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Steam Generators Synopsis

Superheated Steam Generators


 Steam Technology for Significant Energy and Water Savings.  

One Atmosphere Boiler (OAB)®

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Steam Generator Models

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High Temperature Steam Generator

Steam Output in kg/hr

Maximum Steam Temperature from MHI Steam Generators

Very High Temperature Steam

1 kg/hr. HGA Models:

Pure Steam


Steam Rate Flow Adjustment: Discrete and Continuous Mode is Available

MHI OAB Generator

4-12 kg/hr. OAB® Models

Models (4kg/hr, 12kg/hr) 

Single phase 208-240V.

Pure Steam.


Steam Rate Flow Adjustment: Discrete and Continuous Mode is Available

High Output Superheated Steam








36 Kg/hr

36-108kg/hr. OAB® Models

Models (36kg/hr, 72kg/hr, 108 kg/hr or custom). 

Pure Steam.
Please specify the incoming three-phase line voltage

300°C, 500°C, 800°C and Custom

Steam Rate Flow Adjustment: Discrete and Continuous Mode is Available



Versatile Hybrid for Air Steam



Air-Steam Mixture High Temperature Models

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High Specific Humidity Devices

Several New Models

Hybrid Steam Air

Choose Temperature, Pressure, Air Flow and Amount of Steam

MHI will quote a proper premix integrated system




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HGA-M or Custom

Steam Rate Flow Adjustment: Discrete and Continuous Mode is Available


Hybrid Steam Air cN-BPE Required


New Hi P Continuous Flow Steam Generator Mobile Pure Steam Generator

High Temperature and High Pressure Special Units

Steam Generators with Instant Steam Feature

High Pressure and Temperature Steam Genrators

Steam Rate Flow Adjustment: Discrete and Continuous Mode is Available



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What is superheated steam? What is saturated steam?  When water molecules exist in a gaseous-state at a temperature above the boiling temperature of water, it is called the superheated steam-state. When at the boiling-temperature, the steam is called saturated steam.  The boiling temperature depends on the pressure (e.g. 100°C for 1 atmosphere, or 134°C for 3 atmosphere and so on).  What is the difference between saturated steam and superheated steam?  Saturated steam is steam at the boiling point whereas superheated steam is at a higher temperature.  The main difference between saturated and superheated steam is that saturated steam is a two phase temperature and so could contain water droplets whereas the higher-temperature superheated steam is a high enthalpy gas with considerably more work potential. Work potential enables mechanical work and chemical reactions. Saturated steam is often classified as a low quality steam.

What is high-temperature superheated steam? Steam at 300°C and above the boiling point is broadly classified as high-temperature superheated steam*.  For many modern applications of steam, the steam temperature has to be much higher than the boiling temperature (well into the superheated steam temperature range).   How is it made?  In rapid steam-generators whereas saturated steam is made in slow-boilers. Modern steam generators avoid the requirement of requiring high pressures unlike traditional-boilers. Instantly made high quality-clean steam with high temperatures ranging from 300°C to 1300°C is now available for many beneficially steam applications.  The temperature for most combinatory-steam applications should be higher than the inversion temperature (typically above 260°C) for reaping the benefits of a superheated-steam enabled processes like drying, bio-energy, high level cleaning, energy production, antimicrobial, bio-digestion, chemical reactions and many others become possible where work potential is required.  A new area of research is the combinatory steam area for energy reduction.  * MHI definition is invoked.  The temperature of good superheated steam is above any inversion temperature and much higher than the equilibrium saturation temperature.  The equilibrium saturation temperature is the temperature (at a given pressure) where water or water droplets can coexist with steam-gas egg the boiling point 100°C at 1 Bar or 121°C at 2 bar and so on. 4DSintering is a registered MHI Trademark.


Where is high temperature steam typically used? Antimicrobial Use, Oxidation and Erosion Studies, Food Industry, Packaging, Chemicals, Materials. Bio-processes, Energy, Hydrolysis, Process Heating, Flavors, Drying,Textiles and even for the Simulation of Martian Atmospheres (Nature, December 2017).


What superheated-steam is not?  It  is not mist nor fog. Mist and fog have some water droplets in the gas, and thus the name fog.  View comparison pictures of  the difference between mist/fog-steam and a high temperature steam-gas even when produced such that the nozzle area has no mist.. In the picture please note that MHI steam generators produce mist free gas.


How is good high temperature steam superheated steam made?  Such steam is often produced efficiently by special patent protected steam generators without the need for any pressure requirement during the generation process.  When the steam is at a high temperature, especially above the inversion temperature, key-applications like continuous rapid drying, rapid heat transfer, reforming type reactions, cleaning at many levels,or bio-energy and other rapid reactions become feasible. Steam generators are very rapid acting (produce steam within seconds). Superheated steam often leads to a reduction in the number of boilers, a reduction in the feed water usage, reduction in  boiler load, improvement in the process timing, a reduction in the reagents, and emulsification with a overall better yield.  Inquire about 3DPrinting and 4DSintering with steam.


Why are these devices only possible from MHI?  MHI uses patented nano-structured surfaces and other novel materials which have only recently become available commercially for use with active steam.  MHI combines decades of thermal know-how and recent patented technologies with with the well accepted/reliable MHI control systems for high power and high-temperature delivery of steam. It is a part of MHI's overall development scheme of smart power for modern thermal applications.  Substantial energy savings result from OAB® steam use.


Please Request Catalogs and Information.


High-grade, high-quality superheated steam offers a good multiplier to process efficiencies - i.e. it is SmartSteam™.   The temperature of the MHI steam models reflect the actual steam temperature. The savings efficiencies reported are from On to Off condition.  No requirement to heat any tubes or nozzles to produce steam.  Several US and International Patents protect MHI steam generators. MHI Steam generators are influencing the ease of use, and ease of installation of steam devices because of the availability of the higher temperatures from them. In contrast to conventional pressure-boilers, steam generators produce steam quickly on start-up, produce high-quality steam and have less restrictions for piping.  Steam Energy CalculatorVideos and Media Gallery

Some key features of the High Steam Flow OAB®and HGA Generators include:

  1. No Pressure-Vessel Certifications Required for Atmospheric High Temperature Steam.   Very high velocity exit steam flows.  Unique Applications.
  2. Always Stainless Steel.  Unlimited capacity continuous steam generators. Heat up within seconds. Very Low to No moisture. SmartSteam™.
  3. Improved safety over boilers and autoclaves. (See e.g. reported rupture problems with pressure vessel type autoclaves/boilers).  
  4. Please contact MHI as several control features in addition to the power controller are feasible for the temperature and flow rate.
  1. On-Off:  Rapid steam production (almost instantaneous) with no moisture. Comparisons with Boilers
  2. Very Low to No Moisture even during start-up in the OAB.  MHI BoilerFree™ Technology allows for continuous superheated steam generation unlike a boiler which has to fill up a steam chamber then discharge the steam in a batch mode. 
  3. Energy efficient is reported socket to output.  Nearly 90-99% Outlet to Output Efficiency, MHI Rating.
  4. Zero Combustion or No High-Frequency Processes.  No High Frequency Disruption, Zero Device NOX Emissions, No Ventilation Needed for combustion gasses.  Offers multiple hot exit choices.  More Information

Steam Generation Systems

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Pure Steam Generator 1300C steam

OAB® Single Phase. Pure Steam

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HGA-S-CX-1300 Systems. Pure Steam

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High Temperature Steam Superheated High Volume

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Superheated 1 Kg/hr steam

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Steam Air Mixer.  High Specific Humidity at High Temperatures.

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 OAB® Three Phase

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HGA-S and HGA-S-P Models HGA-M High Specific Humidity Device

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MightySteam Link

Power Steam Jet.  A must for cleaning. Mobile Platform.

Check out prices and utility.

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Steam Chamber Continuous

Discover Steam Tunnels for Continuous use

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Easy Fit to Industrial Production Machines and Tunnels

Superheated Steam Use Industries:  Energy, Cleaning, Textile Processing, Pulp and Paper, Cooking, Drying, Disinfection and Sterilization, Cleaning and Recycling, Drying Paint, Drying Machine Parts, Re-forming Surfaces.  Food and storage products, Tobacco Products, Textile Mill Products, Apparel and Other Textile Products, Lumber and Wood Products, Bio mass energy, Bio Pharma, Oxidation studies (inorganic and organic), Paper and Allied Products, Steam spray in hospital uses, green house, soil, Printing and Publishing, Chemicals and Allied Products, Petroleum and Coal Products, Petroleum Refining, Rubber and polymers, steam injection, emulsification, Plastics Products, Leather and Leather Products, Stone, Clay and Glass Products, Cement, Hydraulic, Primary Metal Industries, Blast Furnace and Basic Steel Products, Fabricated Metal Products, Industrial Machinery and Equipment, Electronic and Other Electric Equipment, Transportation Equipment, Instruments and Related Products, Chemicals/Petrochemicals, Electronics, Oil and Gas, Ethanol, pre-treatment of biomass, Pyrolisis, Oil, herbs, Steam Reforming, Complex Methane Ammonia Producing Reactions, Hydrogen reforming, Biodiesel fuels, Finishing, Food, Packaging, Printing, Paper, Pulp, Converting, Forest Products, Pharmaceuticals, Plastics, Rubber, Batteries, Electrode drying, Vinyl, Bio-solids, Sanitation, Disinfection, WGSR reactions, Low oxygen content H2O gas, so dry and could sometimes even be for sterilization, Soil remediation, steam stripping of Volatiles, Pulp, hog/animal-fuel, clean or emulsify bark sludges,Reverse water gas-shift reactions and flavor reactions, Lumber and/or efficient Paper-drying, peat/jute drying, Gasification-reactor, Textile-drying, Drying. 

While several applications offer down the line significant-efficiencies with high temperature superheated steam use, one typical application is to make hydrogen with steam reforming of methane or organic materials, here the higher temperatures give rise to considerably better efficiencies of reactions.  Food Safety Use. Dryer Configurations: Batch/Cabinet, Can/Drum, Continuous/Conveyor, Deck, Loop, Loft, Paddle, Ring, Roll/Cylinder, Rotary, Shelf/Tray/Truck, Skin, Tensionless, Frame, Tower, Tunnel, Warp, Web, Wicket.  Dryer Types Possible: Centrifugal, Combination Infrared/Convection, Attenuate CFC and HCFC Conduction, Convection – Counter flow, Convection – Impingement, Convection -Flotation, Convection, -Through-Air, Dehumidifying, Flash, Fluid-Bed, Infrared – catalytic, Infrared - Long -wave, Infrared - Medium-wave, Infrared - Short -wave, Microwave, Radio Frequency, Spray, Steam, Vacuum.  Energy Source: Dual Fuel, Electricity, Steam.  Materials Dried, Food, Paste/Mixes, Powders, Slurries, Solids, Solvent-based Materials, Water-based Materials.  Manufacturing Process:  Calcining, Curing, Dehydrating, Drying, Dry sand and investment molds, Finishing, Fusing, Granulating, Heat Setting, Acoustics, Research, Heat Shrinking, Laminating, Moisture Profiling, Pasteurizing, Pre-and Post-Drying. Industries Served: Chemicals/Petrochemicals, Electronics, Oil and Gas, Ethanol, Biodiesel Fuels, Hydrolysis, Finishing, Food, Packaging, Printing, Paper, Pulp, Converting, Forest Products, Pharmaceuticals, Plastics, Rubber, functionalize graphite, graphine, Boron nitride, Vinyl. Biosolids, includes Sterilization, Soil remediation-steam stripping of volatile, pulp, hog-fuel, bark sludges, Paper Drying, Peat/Jute Drying  gasification reactor, Textile drying, salt drying and reclamation.




MHI offers patented superheaters for the OAB as well as for existing boilers


OAB®  Superheaters.

Superheaters for MHI

Steam generators.

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MHI also offers superheaters for traditional boilers.

Superheaters for Pressure Boilers.

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High Temperature steam generator SC-12  Electrical Superheater for Boiler

                                                                                                       Click for examples of applications

All MHI's steam devices feature high scalability, reliability, and versatility.

  1. OAB® and other MHI steam generators feature BoilerFree™ technology. One atmosphere steam generators do not have high pressure personnel training requirements. Steam output is in the order of 40m/s. Additionally, steam is self-propelling in most instances. Superheating the steam is an advantage.
  2. Steam Generators can be used for chemical (process and labeling), mechanical or heating purposes with an enhanced energy efficiency, enhanced control system provided by MHI and enhanced pressure line where required no pressure (one atmosphere) to high pressures.
  3. Online help is available for design. High temperature steam generators are simple to install, and easy to use. The OAB's can normally be installed immediately adjacent to the application.
  4. OAB® steam generators features On-demand steam from a cold start within seconds to minutes (for OAB 4 and 12 about ten seconds even for the first run),. No CO/CO2 toxic gas by-products are produced at the device..
  5. Enjoy dry and clean steam of high quality.
  6. Experience significant cost savings in energy, a better product and significant operational ease with the on-off type feature. Relocate or change the layout at will.
  7. MHI is an experienced company in small to large Power Control Panels. Also an experienced company in modular design with manifolds.
  8. MHI steam solutions are provided with units that are designed to simultaneously offer the high temperature-high enthalpy steam of the traditional OAB®, and additionally carry an add-on steam output for a high-pressure steam-line when required.   This feature offers considerable universality. The high pressure attachment can be added to one line of the BPE attachment. Please contact MHI to discuss the add on price. The high temperature steam (up to 1300°C when chosen ) and high pressure steam (up to 4 bar) and hot-water lines operate simultaneously when required. Most applications need only the continuously produced high temperature one atmosphere steam, and not the pressure, because OAB steam exits at a high velocity up to 4-40m/s. The OAB® or HGA can be turned on and off on demand, unlike a boiler. For product finishing processes with steam, please use SaniZap or HGA-M (steam/air/gas mixture).   For oxidation studies please consider the HGA-S-01-superheated-steam-generator or the OAB-4 (from 300C to 1300C).
  9. Solutions and models range from modern industrial OAB-class models (4-36+ kg/hr.) to smaller HGA-class models (1 kg/hr. Voltage 120/220V).  

    MHI OAB Supercharger 550Replace a 80kW conventional boiler with a better performing 4kW in certain applications with Steam Tunnels. See ROI (Savings).

  10. Instant On-Demand Steam Generation.  InstaBoiler™ Technology


  11. Patent Protected

    1. High quality steam or steam/gas mix available if required or pure steam. Varies by model. 

    2. Standard output nozzles connect to standard existing piping.  Use of standard BPE allowed.  Delivery tubes called Vittori tubes provided.

    3. Compact designs are easily adaptable. Industrially required very high-flow systems are available.  Exit velocity is several m/s depending on model.

    4. From heating to cleaning at several levels. Easy applications.   

    5. High temperature without pressure.  Adjust temperature by power and distance.

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    7. Energy efficiency extends to a myriad of important steam applications

    8. Now offering 5 Bar discharge velocity on special models up to 550C

    9. Steam temperatures from 100°C to 1300°C.   Patent Protected.

    10. No moisture in OAB® steam.  From start-up conditions.

    11. Assortment of extender pipes and insulation. 

    12. and easy to install... thermal fluid heating...easy to operate..multiple streams...modern controls, industry tested... innovate Videos and Media Gallery

    What is superheated steam?  Steam can be saturated or superheated. When at the boiling temperature (which depends on the pressure) the steam is called saturated.  When above this temperature it is called superheated.  At sea level and one atmosphere pressure (101KPa) steam boils at 100C (212F) which is then the saturated steam temperature for this pressure.  Above this temperature it will be superheated.  Steam Calculator.  Good high quality steam is dry steam with no water droplets in it.

    New steam from a conventional boiler is rarely 100% dry.  In contrast the OAB steam is 100% dry.    In conventional boilers heat loss causes the steam to condense and become more wet as it travels down the steam-line. A decrease in the steam dryness hinders heat transfer. It is therefore important to monitor steam dryness in order to provide optimum heating efficiency for your system.  OAB steam generators produces dry steam.  OAB locations can be close to the use device.  MHI's steam devices provide high scalability, reliability, and versatility pure steam for high and very high temperatures.  Such steam can be used for chemical (labeling or food), or heating purposes or for general steam use. The OAB® generators provide steam with enhanced energy efficiency with features that encompass no pressure (one atmosphere) to high pressures.  Unlike many Boilers, the OAB Steam Generators may be re-located even after the first installation.  Very small foot-prints.  In several applications ranging from heating vats, reforming, biomass conversion, antibacterial, packaging, paint and epoxy removal, textiles, regeneration of chemicals and powders, steam oxidation, making the most appealing packaging, and other common steam uses like textile, bio-pharma, biofuels or for testing, the energy savings from OAB® pure steam offers an energy savings of up to 95% and a concomitant water savings. Each use is different, Please Request Information for your specific use. Steam Energy Calculator.

 Use of higher temperature steam leads to energy-efficient applications. This is smart power.  Higher temperatures equals higher productivity for most applications of steam. 

This Steam Applications page discusses many examples of the benefits of high temperature steam - smartsuperheated steam.  A significant growth in the steam market is predicted.  Making a switch to innovative OAB continuous steam is warranted.  Please contact MHI.

Continuous Chamber for Packaging Drying and Steam Based AntimicrobialSuperheated steam carries more enthalpy, or total energy, than air at the same temperature and pressure.  For example, air at 1 atmosphere and 300°C has an enthalpy difference of 575 kJ/kg when compared to air at STP.  Superheated steam, at the same conditions, has an enthalpy difference of 2495 kJ/kg* (numbers are approximate). Thus, superheated steam carries over five times the total energy of air when comparing for the same initial and final conditions. This gives superheated steam a much larger capability to do work or perform effectively for chemical (packaging) or food processing needs compared to other gases. Consider use in Brewing & Distillation, Chemical Processing, Clean Steam & Humidification, Commercial Packaging, Dry Cleaning & Industrial, Laundries,  Asphalt Heating & Liquid Terminal Facilities,  Food Processing, Gas & Oil Processing, Paper Processing, Pharmaceutical Processing, Textiles.

Safe high temperature steam

Unlike a traditional steam boiler system, the high temperature steam output for the MHI Superheated Steam Generators is at a safe standard atmospheric pressure (room pressure).  Compare this feature to boiler systems that must induce high pressure to produce steam at temperatures, yet not significantly higher than about 100°C-134°C (1bar - 3 bar) is possible with common boilers/autoclaves. Consider the HGA or OAB for for a much safer high temperature steam solution.

Please do note that the steam is still very hot and requires all the safety feature used for hot gas handling.

OAB Single Phase (Models for 4 kg/hr, 12 kg/hr High-temperature Superheated Steam)

New OAB Single Phase Models 4 and 13 Kg/hr upto 4 Bar.

One Atmosphere Boiler - Electric Superheated Steam Generator

Pure Steam. Clean Steam. One Atmosphere Boilers generate superheated steam that is free of contaminants. The OAB's steam is ideal for pharmaceutical, cosmetics and other industries requiring the highest quality steam. OAB® steam is also suitable for use as utility steam in many applications due to its high energy content.

MHI's One Atmosphere Boiler superheated steam boiler features patented InstaSteam™ technology, allowing for rapid startup times, unparalleled efficiencies and up to 1300°C temperatures. BoilerFree™ technology allows most OAB® units to be installed without the need for traditional boiler certifications. The OAB® is ideal for use as an industrial steam generator, for dewrinkling operations, superheated steam drying and dozens of other specific applications requiring a high efficiency boiler that does not require boiler certifications.  So many great uses in packaging, textiles, drying and more. Steam Applications.

Highly Scalable. Available in 4 or 12Kg/hr very high temperature steam. Smart steam. Modular design allows for easy upgrades and utilizing the unit where it is needed, all without routing steam or venting pipes. MHI is well known for high electronic power and temperature quality control panels

Compare Efficiency. Three types of efficiencies are important to consider. (1) the efficiency of the steam generation device where the OAB® and MightySteam® excel; (2) the efficiency of the downstream process that the steam is used for; and (3) the overall water usage efficiency and propensity to recycle the water. The one atmosphere steam-gas generator/boiler performs well in all three categories.

Controls:  Please check with MHI as several control features in addition to the power controller are feasible for the temperature and flow rate.

Plug N Play - The OAB® devices are very user friendly. Standard 1.5" NPT Nozzle, easy connectors in the back, for power source and OAB® Control Panels.


Transforming Steam Technology For Significant Energy and Water Savings. Savings efficiencies reported are from On to Off condition. No requirement to heat any tubes or nozzles to produce steam.
Conventional boilers are never 100% dry. The old conventional boilers heat loss causes steam to condense and become wet as it travels down the steam line. A decrease in steam dryness hinders heat transfer; it is, therefore, important to monitor steam dryness in order to provide optimum heating efficiency for your system.

Micropyretics Heaters International One Atmosphere Boiler (OAB) is 100% dry.

Simple to use steam production and controls

Pure Steam Generator

Please visit our OAB® section for detail information about the One Atmosphere Boiler


MHI OAB System

Steam Rate Flow Adjustment: Discrete and Continuous Mode is Available

OAB® 4 Models

Typical Applications

Steam Produced


Total Electric Power
Exit Temperature (nominal values)


New PV Models with above

Steam Applications
Steam Comparisons
Request Information

4 Kg/hr Steam

5 Kg/hr Steam

~ 4-6 kW Single Phase Model depends on options chosen.

300°C-1300°C Custom Fit to Application


OAB® 12 Models

Typical Applications

Steam Produced (nominal)

Total Electric Power
Exit Temperature (nominal values)



(800 to 900C)

Steam Applications
Steam Comparisons
Request Information

12 Kg/hr Steam

~12-15 KW Single Phase Model

300°C-1300°C Custom Fit to Application


Supercharge existing boilers MHI SC-12
Plug-n-Play, Easy Piping and Connectors

Easy clamp connector for MHI steam  Bend and pipe easy with OAB steam

Easy to attach pipes or superchargers (economisers).  Uniquely configured K type clamp connectors make it easy to attach the steam pipe to any chamber or device.


How does one increase the rate of production?

  1. Short Answer: Increase the temperature of the process gas or steam.
  2. Long Answer: Please click to Steam Calculator page.

    MHI OAB Generator

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Better conversion factors allow the OAB® units to use less resources to produce more steam. A standard OAB® steam output at 350°C, is almost at the theoretical efficiency of power conversion for the OAB® steam generation! The OAB's rapid start-up (generally with a minute from cold start) also adds considerably to the overall lowering of energy usage.  No moisture is noted even at start-up. 

The benefit of pure superheated steam comes from the temperature without the energy consumption sacrifice.  This is in a way replacement of a large amount of low grade (low temperature steam) by high grade steam.  Kindly read the tutorial information for SmartSteam(TM) on this page

Very High Temperature Steam

Please click to the applications page to compare superheated steam and boiler steam.  For a comparison table for saturated steam and superheated steam please click here.

Water Flow Indicators on OAB Superchargers and Special Outlet Nozzle/BPE

Water flow and steam flow indicator


Quad 4 BPE from supercharger
High Temperature steam pipe connections

Several indicators including water flow (analog and digital) are provided.

Contact MHI

When individual streams of steam are needed a quad BPE is used.  

Vittori Tubes for Steam Discharge also shown


Getting to temperature quickly and faster results in lower operational wear and related costs i.e. an overall higher productivity with corresponding higher kinetics. The output velocity of the 550°C OAB® steam is very high - almost 40m/s or more. This feature is used for the uniform heating of kettles/heat exchangers and for reaching large piping distances without significant loss of temperature. For industrial vats and kettles, the heating rate makes a considerable difference to the overall process economics. A general rule of thumb of productivity from traditional pressure boilers is - (0.35 Gallons of heated product like water)/kWhr. For the OAB-4® it is closer to - (1 Gallon/kWhr) i.e. almost three times (numbers may be lower or higher as they are situational dependent and one needs to evaluate on a case by case basis).   Industries served for during.  Please also see Single Phase OAB and Airtorch.

The OAB® offers a scalable design and because of the small foot-print qualifies for the MHI Never-Down policy. The scalable design allows the user to choose what fraction of the boiler needs to be turned on on a given day or hour and changed at will. MHI electronics provide full data logging, on-screen data acquisition display and a repertoire of 100 programs - all in the small sophisticated control panel. How do Temperature and Pressure Impact a Steam Reaction? OAB® Compared to Traditional Boilers.

Learn more about OAB® and it's applications

How do Temperature and Pressure Impact a Steam Reaction?

OAB® Compared to Traditional Boilers

Steam Calculator, Productivity Enhancement and FAQ's |Physical Properties of Moist Air/Gas | What are Steam and Humidity?


OAB® Three Phase ( 36 kg/hr or more High-temperature Superheated Steam)

OAB-36 Scalable Superheated Steam Platform

OAB® steam system will change the way you think of superheated steam in regards to installation, safety, size and energy cost.


Shown above is a three-phase scalable platforms for the OAB-36 system and OAB®-72 in two different configurations. Each platform is individually controlled with a modern TRIPAN power-panel, allowing significant flexibility of use.

Please contact MHI for details.

Highly Scalable® units can produce from 1kg/hr to over 1000kg/hr. The modular design allows for easy upgrades and utilizing the unit where it is needed, all without routing steam or venting pipes. MHI is well known for high quality electronic power - temperature control panels.

OAB® Scalable Platforms Key Features
  1. On-Demand Steam
  2. Instant super heated steam generation (instant implies within a minute or much lower)
  3. 300°C (Discuss with MHI for up to 1300°C exit temperature)
  4. Scalable volume output starting at 4kh/hr
  5. No Certification required for pressure rating or inspection
  6. Built for energy efficiency and high productivity
  7. Small foot print.  Easy to relocate as required.
  8. Discrete BPE or Continuous Steam Side amount variation.
  9. New PV Models with above


Typical Applications

Steam Produced (nominal)

Total Electric Power / Exit Temperature (nominal values)

Approximate financed monthly price


Boiler Heat Exchanger Inputs Heavy Duty Steam, Heavy Drying

36 Kg/hr Steam

About 39kW and higher depending on Temperature Models  300C-800C

Contact MHI


Boiler Heat Exchanger Inputs Heavy Duty Steam, Heavy Drying

72 Kg/hr Steam

About 75kW and higher depending on Temperature Model  300C-800C

Contact MHI


Boiler Heat Exchanger Inputs Heavy Duty Steam, Heavy Drying

108 Kg/hr Steam


Contact MHI

Custom Solutions

Custom Videos and Media Gallery


As required with high pressure and hot water line and superheated steam

Contact MHI


Special 3 Phase for OAB-15-300.  Please contact MHI.

HGA-S (1 kg/hr High-temperature Superheated Steam)

HGA-S Devices

MHI's steam devices feature high scalability, reliability, and versatility. The OAB steam generators feature BoilerFree™ technology. 

Steam Generators can be used for chemical, mechanical or heating purposes with enhanced energy efficiency,.

No moisture, quick start up and shut down. Online help available for design. 

No CO/CO2 toxic gas by-products (electrical generation).

Some government surveys show that steam may account for one-third of all the energy used in process plants - so optimization with a high efficency generator will pay-off.

A safe optimized OAB® system may lower the cost of your steam system and yield large returns.

Please contact MHI for ROI calculators.

  1. Direct plug-in, self contained system
  2. High Quality Steam (quality of steam is a industry-used technical phrase that indicates water content in steam). True HGA steam is 100% quality.
  3. Integrated Thermocouple
  4. Includes Flow Rate Control with Pump Offerings that Provide Different Levels of Flow-Sensitivity and Display
  5. Vittori Flexible Tube available for flexible connection from generator to process chamber
  6. Other options include flow deflectors and back pressure tolerance enhancers (BPE)

General Specifications

Exit Temperature


Steam Output


HGA-S Control Panel


HGA-M  (High Humidity Steam Generator)

HGA-M-01 Superheated Steam/Gas Generator 1kW

HGA-M-12 Superheated Steam/Gas Generator 12 kW


Specifications for 1 KW

High temperature superheated steam-air or steam-gas output. Superheated steam is a odorless high temperature gas (not to be confused with hot water mist).  Several options available and recommended.

  1. Voltage: 110VAC

    Frequency: 50/60 HZ

    Current: Approx. 9 Amps @ 110VAC

    Power Consumption: ~1000 Watts

Potential uses:  For drying, cleaning, layering, epoxy drying and other film uses where superheated steam is required at one atmospheric pressure. Ideal for steam drying or steam oxidation.  Product has uses in surface technologies, cleaning technologies, drying technologies, curing technologies, nano technologies.  Attempt use also for precipitating crystals of several small sizes including nano crystals from solutions.  Precipitation droplet sizes may be controlled by controlling rate of cooling, impingement conditions and type of surface. 

High Humidity Control: Steam temperature and the relative mass of moisture in steam-air mixture (specific humidity) depends on water valve setting and air inflow setting.  This unique device can give more than 40% specific humidity at temperatures greater than 100C (compare with a specific humidity of less than 3% in fully saturated air at room temperature i.e. air with RH=100%).  

Typical settings: (Full power of 1 kW): Air 1.45 CFM (inlet at ~30C) and water 330ml in 45 mins (inlet ~30C) yields steam-air temperature of about 350C. Air 1.4CFM (inlet at ~30C) and water 200ml in 20 mins (inlet ~30C) yields steam-air temperature of about 250C. Air 1.8CFM (inlet at ~30C) and water 200ml in 20 mins (inlet ~30C) yields steam-air temperature of about 150C.  The values above should be considered as approximate. Your results may vary with unit and the type of use.  The unit come with a manual which has comprehensive valve setting data (manual available only with purchase).

Safety precautions must be taken when dealing with hot gasses.  Please write or visit MHI website a free manuscript on superheated steam or refer to any standard book on steam thermodynamics.


Installation: Installation and use manual provided with product.

Options: Control thermocouple for the hot air generator part is included. Steam output temperature thermocouple and bracket is sold separately or user may provide their own on their part. Electrical 110-120V 50/60Hz supply required for this unit. 1KW system requires compressed air input.

HGA-S-CX1300 (1300C Superheated Steam)

HGA-S-CX1300 High Temperature Steam Generator

HGA-S models are our small scale superheated steam generator line. It features a small device footprint and standard output ratings of under 2Kg/hr of 400-550°C steam.

HGA-S-CX models for 1 Kg/hr of 1300°C steam. Standard HGA-S-CX models are optimized for laboratory scale steam generation, as well as small scale industrial production applications.

  1. HGA-S - 1-2 kg/hr of steam at 400-550°C
  2. HGA-S-CX - 1- 2 kg/hr of steam at 1300°C
  3. HGA-S CX1300 Details

    1. Dry steam up to 1300°C
    2. 1 atmosphere pressure standard, higher pressures available
    3. Plug-and-play system
    4. 1/4" NPT outlet for easy connection to existing piping
    5. Quick-disconnect water inlet
    6. Standard integrated K-type process thermocouples
    7. 120V/220V AC outlet compatible
    8. High temperature steam chamber available
    9. Use as steam reaction chamber or pass-through steam enhancer
    10. Optional MHI BPAN-O controller provides enhanced closed-loop feedback process control. MHI-DACS compatible
    11. Integrated over-temperature thermocouple protects against overheating
    12. Standard peristaltic pump allows metered water input. Adjustable range from 0-32mL/minute, higher flows available
    13. Integrated pressure relief valve for safe operation
    14. Approximately 2kW+ total system power for research use (this model). Higher power industrial units available
    15. Compact design
    16. All stainless steel construction
    17. Highly efficient

MightySteam (Superheated Steam Jet 400°C)

MS-400 (MightySteam®)

What is MightySteam®?

MightySteam® is a portable steam generator ideal for many cleaning applications. MightySteam® offers standard high temperature cleaning steam, as well as high temperature non-condensing steam, often ideal for many levels of cleaning. All MightySteam® devices feature SaniZap® technology, allowing for fast, effective cleaning of surfaces. The MightySteam® unit consists of two primary parts, the ergonomically designed steam generator, which features the steam output nozzle, and the water tank.  Models are available with convenient backpack containers as well as those meant for bench or tabletop static use.  Once plugged in, the MightySteam® begins to generate superheated steam within seconds.

Request information.

Easy to Use Superheated Steam Cleaner                       Bayzi - Steam Cleaning Solutions

Now offering MS400-4 a high power superheated steam jet cleaner for HVAC systems.

  1. The MightySteam® is highly portable, quiet and produces steam very quickly.
  2. No boiler certifications or intensive training is needed for steam generation.
  3. The MightySteam® features truly plug and play operations up to an unmatched 752°F in some models or custom higher superheated steam in an easy to use, compact profile.
  4. Steam is a penetrative gas and a known agent against microbes.  Must be used in the proper fashion for the best residence time.

Industrial Strength Pure Superheated Steam

  1. MightySteam® produces a highly effective 752°F or hotter superheated steam, allowing for faster and more effective cleaning.
  2. Dual output conditions allow MightySteam® units to produce high temperature cleaning steam as well as superheated steam ideal for disinfection.
  3. MightySteam's small profile allows it to be easily stowed away when not in use. Included storage box keeps MightySteam® unit safe from damage and also doubles as a convenient water reservoir.
  4. Laboratory tests have shown that within seconds high temperature steam will de-nature many bacteria and microbes. Higher temperature steam will need less time to be equally if not more effective. The quality of steam is important. Steam is a known antimicrobial agent. All disinfecting chemicals or steam are agents, and high temperature steam is a very powerful non-toxic agent. Periodic treatment with high temperature steam is recommended (when used properly) to achieve maximum benefits. Steam quality can sometimes be checked with the proper steam chemical indicators. For bacterial testing please begin with commonly available test kits (Read this Blog Post for more information on how to determine the cleanliness). When possible always please check with a professional microbiologist.


This product is for use by Professionals only.

Great care must be exercised with the use of steam producing devices that are used to create and/or direct steam on to any object or surface. MightySteam® is capable of inflicting steam burns if exposed to skin, so always use the proper personal protective equipment to ensure the operator's safety. Never operate the MightySteam® around small children or animals who may be curious of the steam. Never attempt to "feel" how hot the steam is, you will get burned. Surfaces treated by the MightySteam® may also become hot to the touch, so use caution when touching impacted surfaces.

Learn More 

HGA-4P-750 (High  Temperature and Pressure Devices)


Steam Tunnels Steam Jet Plug-n-Play to Vats BPE/CPG
Steam Chamber Continuous Best Cleaner Vat heating for juice, chilli, heatsetting

Saving Milk from Curdling

Food Safety

Consumer Packaged Goods 
Smart Continuous Steam Chamber for Packaging Drying and Steam Based Antimicrobial

~90% energy and water conservation, even for the most complex-shape glass bottles.

Antimicrobial Steam/Paint Removal Made Easy

What is anti-microbial cleaning?

Portable steam generator. 

Cleanliness at several levels

Continuous Steam Vats

Rapid Packaging With Energy Benefits

Food and Brewery Industry. 


Contact MHI for Textile Applications with Smart Steam

Innovate, take the smart risk to save energy.





Typical Applications of Superheated Steam (Drying to Reacting)
to Improve Productivity

Bring your designs to life with beautiful colors and creative shapes


The basis for the steam applications is discussed below:

Heating:  Steam offers heat transfer coefficients that are very high.  The heat content is also very high.  Steam dries faster than air above the inversion point.

Antimicrobial:  Dry high quality low-oxygen steam is a known antimicrobial agent without any organic residue.

Chemical:  Many steam reactions are beneficial for energy production and biomass. Superheated steam offers high kinetics.

Penetration: Steam as it condenses, continues to wick.

Additive:  Add to Gas Or Plasma Streams

Low Pressure Steam: Check out the options.


Industrial Sector
Biomass (for electricity generation) Sawdust, wood fiber, pulverized coal, wood chips, wood pulp, spruce and birch bark, milled peat, peat for briquettes
Chemical industry Washing powder, pigment, potassium salt, powdery chemicals, catalysts, coloring agents, regeneration (chemical), carbon activation.
Food industry (sugar) Sugar beet pulp, dietary fiber from sugar beat
Food industry (base materials) Hog fuel, corn fibres, protein containing base materials (soy beans, rape seed, sunflower seed, soy meal, okra, etc.).  Peel vegetables like potato or tomato or dry vegetables, essential oils, organic compounds
Food industry Shrimp, pork, bamboo shoot, paddy / rice, herbs, cacao beans, corn gluten, tobacco (drying, expansion).  From cooking to cleaning.  Videos and Media Gallery.
Food industry (starch) Starch, potato, vegetable, wheat flour, distillers grain and other staples. From cooking to cleaning.  reported to much better than vacuum drying.
Food industry (meat) Pork, bone meal.  Clean meat tables and study tables.   Food laboratory.   Review a study.
Epoxy. Mold Curing and drying. Polymer curing, reactions, coagulation.  Drying of sand molds and investment molds.
Chemical processing Reaction kinetics manipulation, water-shift and WGSR, reverse water gas-shift reaction, flavor reactions, photosynthesis
Paper & pulp applications Paper, fibre/fiber sludge from waste water treatment, drying
Textile applications (Coated) textile, drying, cotton fibers, improve water uptake, improve quality of fiber yarn for cotton
Waste materials Industrial wastes, filter cakes, sludges from water purification, municipal sludge
Vegetables & fruit Vegetables, Tea, Coffe, herbs
Dairy industry Milk powder, flash drying
Potato Potato products, fries (pre-drying)
Metal finishing For antimicrobial and other types of cleaning/finishing metals, semiconductors, silicone/plastics, rubber, composites and ceramics.
Building materials Wood, lime mud (before calcination), paint, adhesive, mineral wool, fibres, lumber, cement curing, Shrink wrap packaging, quick energy efficient use.
Laundry industry/ General to special cleaning Laundry, dry cleaning, cleaning (several levels including microbial).  Clean bio-mplants and textiles.
Textile fiber enhancement Improved torsion strength of the fiber
HVAC cleaning please click to cleaning

Videos and Media Gallery

MHI holds several key patents for steam generation, sterilization, packaging, uses like soil steaming and more....

Superheated Steam Generators - 1kW   |  High Efficiency Steam Recirculating Ovens

One Atmosphere Boiler OAB® Other Suggested Applications

Why use an autoclave if your need is high temperature steam?   

Calculate the energy used in pressurization/vacuum and compare foot-print with the OAB. 

Foot print of steam generators.  Boilers are not for continuous steam, Save wasted energy from vacuuum or pressure

Commonly Asked Question:  Does one need high pressures or vacuum for steam to penetrate textiles or cloth packs?  

Answer:  Most often no provided the steam is superheated properly.  Steam self-propels as a gas.   Use the unlimited capacity for continuous steam generators.

For a more detailed answer......please inquire here for pack penetration.

Calculations of Savings from Smart Lower Power Consumption Technologies

Efficient steam tunnels for packaging, shrink wrap, antimicrobial and textile

The examples below are provided only for ideation.  Please contact MHI for specific details.  No result is guaranteed.

Use the OAB® for Oil Softening of Heavy Oil in Wells and Tanks.  Transition towards smart capital expenditure (CAPEX) and innovative operational expenditure (OPEX) are imminent in the oil and gas industry, especially with highly unstable barrel prices. Reduce foot print.  Easy to carry.  Reduced use of electric and water.  Use for Oil Mud.  Most Compact.  

Pilot Plant Steam Generator for Possible Pharmaceutical Applications


Safer because no pressure leaks, high temperature kinetics and energy efficiency.

Simple SaniZAP Clean dirt and grime in difficult to reach places.  First soften and clean with handheld superheated steam then power-blow with hot air.  Need more steam - the OAB models are ideal. Steam-soften with the proper superheated MightySteam.  Then VTA hot air blow with the powerful VTA-1GC  hot air powerblower unit.  Simple.  No water mess and use of the highest temperature steam.  Use for restorative cleaning and degreasing

Pilot Plant Steam Generator for possible steam reforming, with carbon, bioproducts or methane and nitrogen for ammonia applications.  MHI OAB and HGA devices are very efficient, controllable and clean. For example the reaction 2N2(g) + 2CH4(g) + 2H2O(g) + O2(g) = 4NH3(g) + carbon oxide by products  is a negative free energy feasible reaction at 400C.  Or use for biodiesel,or with carbon to produce hydrogen or other clean fuels.

Electric Steam Generator. Foam cutting high speed, low power, no mess with thermal steam cutter.  Use best steam that evaporates on cutting.  Ultra High Purity Steam. Also called UHP or UHT steam.  Textile, continuous heat setting and laundry steam chamber use.

Superheated Steam Generator for use in steam oxidation studies.  Use HGA-S or HGA-M.

Continuous steam.  Unlimited capacity.

Save big on easy paint removal techniques with MHI steam from enamels to hard paints  (view powerpoint  -   inquire or rapid buy).  Can you find a better paint remover?   Foam cutting.  Thick foam cutting speeds ~1"/s.

Save 90% energy for cleaning (example for bird droppings).  Consumer packaging labels.  Improved energy, less water use, improved speed and quality.

Energy Saved for Laundry or Garment pressing.  Car seat Pressing.  Laundry Use.  The energy requirement is approximately 0.15 – 0.30 kWh / kg of linen (source This is a good number for dry-cleaning but for full steam drying it may be best to use a number like ~1kWh per /kg.    If you are using and paying operationally for a 300kW boiler (1,024,327 BTU/hr) (or 30BP); are you dry-cleaning 900 kg (close to a ton of linen) of laundry in an hour? If this is not so please consider OAB instead to save energy. The cost of energy is similar whether gas or electric. Click here for savings from energy efficiency.  Garment dewrinkle, heatsetting and textile conditioning in a raoid energy efficient manner.

 Energy saver for heat set of textiles (dye drying).  Choose OAB-4-300 Model.


Drying of silicates, sand, porcelain and investment molds during casting.


Drying with steam- ceramics to textiles.  Choose steam higher than 250C.  Non condensing. Note OAB steam generators may be turned off and on quickly unlike most pressure vessel type boilers. Continuous steam without pressure drop again best for quality control.  Most often neither pressure or vacuum is required in an applications.  Pressure is often just a way for traditional boilers to achieve high temperature-  not required for the specific application.  See also Steam Energy Calculator and steam kinetics.

Seats pressing in rapid demand operations like automobile seats manufacture.  At 10 cents per kWh a 300 kW boiler operational cost could be as high as $30 an hour.  A 10 kW OAB machine reduces this payment to ~ $1 per hour.  Many electric companies offer grants to make capital changes with energy efficient new machinery.  Whether a 12 kW OAB may substitute for a 300 kW boiler depends on the application.  Most applications where a high velocity jet is required can be met by the OAB.  Please see video in Videos and Media Gallery section.

Improving starterter oxidation  for copper tubes.

Steam Copper-tubes for water delivery to start protective oxide (Malakite) barrier in them.  Reduces copper contamination and other contaminants from pipes that do not have this starter oxide.  Do internal pipes.   Please contact MHI for known technical results and referal to the proper EPA laboratories for your carification..  User may need to call government agency for proof of results.   Please contact MHI for details.

High Pressure Steam Boiler can be avoidedLaundry boilers, tunnels and other energy improvement uses are possible in the garment and laundry industry.  Several levels of efficient cleaning and de-wrinkling  Higher temperatures de-wrinkle leather more easily.  E.g.  Clean  fifty pound loads with an OAB® and canopy.  The canopy does not need to be a heat dissipating rigid surface!


Choose your own steam bluing/blackening for attractive surfacing.  Use steam generator for steam oxidation studies. 

Use Process Steam for oil (normal and heavy oil) and natural gas to reduce viscosity.

Commercial Steam Boiler and OAB.   Cheese Making.

Heat Processing to make cheese is varied the type of technologies used in practice. The time and temperature programme for heating is determined by the method of heating and the type of cheese. Some cheeses require heating to temperatures above 40°C-56°C (133°F) Normally at 37 – 38°C the activity of the mesophilic lactic acid bacteria is retarded.  Time is taken check the acidity, Above 44°C or more the mesophilic bacteria are deactivated, and they are killed if held at 52°C between 10 and 20 minutes. Heating beyond 44°C is typically called scalding. Some types of cheese, such as Emmenthal, Gruyère, Parmesan and Grana, are scalded at temperatures as high as 56°C (133°F) . Some of the most heat-resistant lactic-acid-producing bacteria survive this treatment e.g. Propionibacterium freudenreichii ssp. shermanii". Credit to is acknowledged for the above information.

Pure Steam Generator.  Milk and Cottage Cheese.  Augmentaion of process.  Significant reduction of energy from unweildy and high Btu/hr (kW) boilers currentlysee use. 

A frequently asked question is:  I do understand that milk products have increased considerable resistance to deterioation when UHT steam is used.  However will this denature protein in any way that is bad for me?  The answer can be found on many web sites like   Bakery Operation with on demand (on-off) steam.  Food processing humidification.Benefits that may also follow from SW-OAB® Steam in addition to savingconsiderable energy for shrink labeling activities. — OAB® and MightySteam®'s patented heating system
and service allows for an industrial strength steam output.


Continuous Superheated Process Steam for Odor Removal and Other Uses.  Carbon Activation.  Superheated steam can be used for physical/chemical activation of carbon resulting in enhanced naoporous and porous structures  of carbon ( about 10-(50-80) nm). The resultant carbon is called activated.  It is higly porous and activated.  This nanoporous/mesoporous microporous structure is expected to enhance the removal of toxic hydro-carbons and other dangers from waste water/water works and from gas.  Continuous steam temperature that is required is greater than ~800°C and dry.   Please consult MHI for known techniques for start-up of carbon containing canopies or drums.  One important requirement for this is the availability of instantaneous steam, within minutes because moisture if present tends to clog pores.  The OAB-4 system or the OAB-12 system makes instantaneous steam.   Please see video on Videos and Media Gallery.


Electric Superheated Steam.  What is the difference between Disinfection and Sterilization?   See box below.  Steam temperatures greater up to 1300C.
Steam Sanitation: Studies have shown that even 1 second of residency time of 248°F (120°C) steam is roughly 97% effective against common strains of bacteria1. In controlled experiments, higher temperature steam requires lower residency times to achieve effectiveness. This result most likely follows the common law of chemical kinetics where speed increases exponentially with temperature.

What is the difference between Disinfection, Sanitizing and Sterilization?  Sterilization vs. Disinfection vs. Sanitization
There are 3 fairly commonly accepted levels of "clean" in many industries. Sterilization refers to the statistical destruction and removal of all living organisms. Disinfection generally refers to inanimate objects and all vegetative cells, but not spores. Sanitization refers to the reduction of microorganisms to levels considered safe from a public health viewpoint. The official definition of sanitization, according to the Association of Official Analytical Chemists, for food product contact surfaces is a 99.999% (5-log) reduction of contaminants in a 30 second period. For non-product contact surfaces, a 99.9% (3-log) reduction in contamination is necessary. What is anti-microbial cleaning?

Sterilization requires 6 to 12 log or more cleaning potency mostly done in steam sterilizers that are approved for this purpose.  the antimicrobial market has been largely comprised of chlorine (bleach), ozone, quaternary ammonium compounds (quats), peracetic acid (PAA), formaldehyde and glutaraldehyde (aldehydes), and hydrogen peroxide. All of these technologies have limitations in addressing sanitization and disinfection needs.


Steam is powerful.  Se Patents Other published patents have shown superheated steam can clean upto sterilization levels. Patent numbers 8,940,245, 8,945,468, 8,652,403, 8,435,459  and many others that are available.  See also

Steam Boiler for Steam Kettles, Processing Mash with Steam, Saving Energy and Materials.  Save considerable energy and time.  Generally from cold start cut up to 1/3 the time.  Will preservatives be reduced by steaming - most likely not?

Commercial Steam Generator for packaging

View efficient steam tunnels for packaging, shrink wrap, antimicrobial and textile

Industrial Steam Generator and Tunnel for cotton fiber mositure doubling.  Moisture in cotton yarn fiber is able to make the fibre more abrasion resistant as well as more fatigue resistant.  Use for heat-set and save considerable energy.  No need to use vacuuum or pressure chambers. Review amazing ROI.

SaniZap® technology is employed in the MightySteam™ line of steam cleaning products and also by the MightySteam™ service which represents a service that provides for the cleaning of interior and exterior surfaces utilizing concentrated superheated steam for residential, commercial and industrial purposes.


Tankless Instant Steam Generator

Steam  and continuous steam chamber for curing rubber or plastic and improving fibers for textiles (cotton)

Type of Cotton (Treatment)

Moisture Meter Reading on a low humidity day (Base 35 %RH in Cincinnati)

Moisture Meter Reading on a very high humidity day.  (Base 70 %RH in Cincinnati)

Torsion abrasion comparative test.

Relative Scale


3 - 5.2

4.9 - 5.8

2-4  Low

Vacuum Steam Treated by Conventional Process  


6 - 8.5

9-12  Medium

MHI steam (tested after about 4-6 days post treatment)

8 – 9.5


10-20  High


Endotoxin Free Steam

Industrial Steam Boiler

Laboratory Superheated Steam

Low Pressure Steam Boilers

Electric Superheated Steam Generator

High Pressure Steam Boilers

High Temperature Steam

Low Pressure Steam

Low Pressure Steam Boiler

Steam Generator Boiler

Steam Roasting.  Activated carbon by steam both Stage 1 and Stage 2 (Steam of 700C and 1100C)

Electric Steam Boiler

Electric Steam Superheater

Steam Boilers

Steam Reforming Hydrogen

Wine barrel conditioning and reconditioning.   See also hybrid.

Heavy Oil recovery with low energy and water input.

Use in Oil storage and Oil tanker applications.

Wood Conditioning for utility, packaging and hobby use.

Safe kettle-heating for Breweries, Flavors and other such use Industries. 

Energy efficient kettle heating for Breweries, Flavors and other such uses.

Superheated Steam Drying

Instant Steam Generator

Superheated Steam Boiler

Touch-up steam MS400-01 - 1Kg/hr of steam up to 400°C. Use for steam spray purposes only.
Request OAB Information

How much money savings from energy savings with smart steam power technology

Lower power consumption by :




Approximate savings per year of :




Assumptions include 1kWhr-10 US cents.  Continuous use for the year.


Compare the OAB to:
Fire Tube Boilers Water Tube Boiler
Industrial Boiler Gas Steam Boiler

Traditional boilers yield saturated steam (Tsat and Psat are linked). Boiler efficiencies increase with lower pressures. At 10 Bar the saturation temperature is only 180°C.   This temperature can almost instantly be achieved with the OAB and other MHI steam generators at a safer 1 bar pressure.  If the steam is for heating purposes, please compare the enthalpy.  If the steam is for work purposes please use the work potential row below, the work potential increases with both temperature and pressure.  Work potential is measured from 25°C base temperature.  The cost of boilers increases for very high pressure ratings.  However even at 100 Bars the  saturation temperature is only 311°C.  Again a fairly easy and routine temperature from the OAB.

1 Bar =100000 Pa = 14.5 psi,  10 Bar =1000000 Pa =145 psi, 100 Bar = 107 Pa = 1450.3 psi


Steam Solutions Comparison

What is the difference between an industrial boiler and a steam generator?   Steam generators are modern devices with instant on-off, steam velocity control and significant temperature exit capabilities all without having to use up energy to create pressure.

Industrial boilers have worked well but they are 19th and 20th century type technology machines with low efficiencies. They can reach 85% efficiency in many configurations, but they still have significant drawbacks in temperature capability.

  1. Temperature Limitations - Industrial boilers are temperature limited by pressure. To obtain higher temperatures, higher pressures are required. Not so for steam generators.
  2.  To operate at lower temperatures than rated, boilers typically sacrifice efficiency or safety.  Not so for steam generators.
  3. Combustion Process - Nearly all industrial boilers utilize the combustion process. This leads to Co2 and NOX production as well as fossil fuel consumption.  Combustion processes typically result in low efficiencies and high energy losses.
  4. Safety - Pressure vessels can fail and explode. Low water levels can result in boiler overheating and potentially explode. Gas leaks pose an inhalation danger as well as an explosion risk.
  5. Certifications  - Any boiler or pressure vessels require certifications and inspections.  Review the boiler regulations for your state
  6. Difficult to Use Boilers - Boiler operation is typically dependent on specific, trained individuals who are trained to read dials and follow numerous safety measures as per local code. Boilers are complicated.

Steam Generators use 21st century technology. No combustion or pressure vessels. OAB and HGA patented technologies allow steam generators to operate with unparalleled efficiencies, saving you time, money and improving your process.

Steam Without the Wait

BoilerFreeTM technology allows nearly instant steam production. Most MHI steam generators produce superheated in under a minute from a cold start. With a variety of outputs and configurations available, MHI likely has an energy efficient high-productivity solution for your steam application.



One Atmosphere (OAB) Steam

Water Tube Steam Boilers

Electric High Pressure Steam Boilers

Maximum Steam Temperature1

300-1300°C Standard. Choice of Models. Always high flow. No moisture. High performance.

Sometimes up to 600°C with Economizer and Superheater.

134°C for 3 bar steam.

Delivery to Initial Start up.

Models are easily installed in a day and there is no anticipated wait for certifications to start.


Small units could be plug and play.  Large units may require certification time





Idle Energy Waste

Low (Choice of Continuos or On-Off steady-state steam)



Non Steam Producing Energy Usage Time
(Start Up Time2)

Nearly Instant.  Generally within a minute.

60+ Minutes. Becomes slower with higher pressures and volume requirements

~60 Minutes. Becomes slower with higher pressures and volumes. (Not including cool down and pressure release for autoclaves)

Suggested Inlet Temperature3




Capital Cost per Kg of Steam3

Low.  Financing available when qualified.


Moderate. Depends on temperature/pressure required.

Operational Costs4

Low even up to 1300°C.



Unit Footprint

Starting at 1'x1'x1'.  Small and remotely locatable power panels.


Depends on size and pressure requirements.

Plug & Play Operations




Requires Boiler Certifications5





Low (Unit can be used for continuous steady-state steam).  On account of the low foot print and modular designs the MHI-Never-Down Service™ is available for all steam units as applicable.



Utilizes Combustion7 (Requires Ventilation)




Energy Needed to produce 100 Kg/hr steam from cold start

~100 kWh @~350°C.  Water at Room Temperature to Steam.

~150-200 kWh Equivalent (Including start up time consumption).  Not always reported from room temperature water.

~150kWh Equivalent (Including start up time consumption). Not always reported from room temperature water.

Power Weight [Kg Equipment/(Kg/hr) of steam] for a 100kW Generator

~2 Kg per Kg/hr of steam.

~5Kg per Kg/hr of steam (Weight increases with temperature/pressure)

Maximum Work Potential (Based on second law limitation) Base is 1 Bar 100C liquid water for all.

672 kJ/Kg for 500°C superheated steam
1973 kJ/Kg for 1300°C superheated steam

755 kJ/Kg for 10 Bar saturated steam
1169 kJ/Kg at 100 Bar saturated steam

Generally not used for creating work.

Enthalpy (heat) Content

3489 kJ/Kg for 500°C superheated steam at 1 Bar

2777 kJ/Kg for 10 Bar saturated steam
Saturation steam temperature 180°C

2725 kJ/Kg for 3 Bar saturated steam
Saturation steam temperature 134°C

Running at Partial Capacity

With MHI Electronic Controls, No loss of efficiency

Significantly lower efficiencies, if model is capable

Lower efficiencies

Air Contamination Effects

Extremely high operation temperatures diminish effects of air

Air contamination harms output

No air contamination is allowed (strict)

Piping Losses

Discrete, locatable units reduce necessary piping. The one atmosphere pipe can be better insulated and lighter.

High pipeline pressure combined with long piping distances leads to heat loss and dangerous conditions in the event of pipe failure. Pipes can be heavy.

High pipeline pressure combined with long piping distances leads to heat loss and dangerous conditions in the event of pipe failure. Pipes can be heavy.

How far can I run my pipe?  Infographic.

Typical Improved Efficiencies (Energy)

Application dependent - sometimes over 50%

Improved Water Efficiency

Application dependent - sometimes over 50%

- -

Request OAB Quote

Contact Information









If you know the HGA or OAB model for your request please ignore the rest of the form and simply add the model nuber to the comments box below.

For an OAB® or a HGA quote request, please indicate the temperature and amount of steam per hour.

Desired output:

   Please use the remarks box below tfor additional information.

If other gas involved, please specify gas and flow rate. Leave blank if unknown. 

Steam flow-rate in kg/hr


Model number if already known


Required steam ouput temperature

  °F  °C



Please indicate supercharger steam flow rate (SCFM) for the existing boiler or generator if requesting information on a supercharger


Required steam ouput temperature

  °F  °C

Remarks and Comments


Please leave this box empty:


If replacing an old boiler with the new generation OAB® please note that many older style Boilers are sometimes rated in BHP which stands for Boiler Horse Power (1 BHP = 9.8 kW = 33,500 BTU/hr).

OAB® steam generators may use much lesser power than most conventional pressure, or vacuum, steam boilers for the same objective.   Examples are shown on the steam applications page.   For superheater-only requests, please indicate the SCFM required.  A MHI representative can assist with this information if required. Please indicate additional details of the attachment boiler (such as electric, gas, quality (water content) of the boiler steam) in the remarks box.  Thank you.