Airtorch™ Air and Process-Gas Heaters

The Airtorch™ is a highly scalable electric process air heater typically utilized as shown in the Airtorch™ Infographic. Several models available.  Simple 5-step selection guide and flow as a function of temperature for various models.  MHI provides models for 750°C, 925°C, 1000°C, 1100°C and 1200°C.  Prices increase with power and temperature.  New:  Inline-Airtorch™ models for process heat are now offered with input up to 600°C into the Airtorch™. The output is up to 1200°C (~2150°F). Contact MHI for Airtorch™ and Airtorch™-recuperator uses.

Why MHI Airtorch™?

Very low pressure drop-highest temperatures-high efficiency-industry leading quality, price and delivery.  High amounts of pressure-drops can cost the user a lot of wasted expenditure.  See example here.  Please Request Information

  • LTA – Up to 900°C. LTA is a process heater for air which requires a compressed air input.
  • VTA – Up to 900°C. VTA is process gas heater with fan or blower with low flow sensor capability.   New* VTA with fan models for 1100°C.
  • MTA and GTA – Up to 925°C/1100°C.  These are flow or inline sealed process gas heaters which can take compressed air or compressed gas input. New Models for MVTA-DPF-DNA Class.
  • DPF – Up to 1150°C-1250°C/~2200°F. DPF models can take fan or blower input as well as a compressed air/gas input.
  • Large Flow MVTA.  For 1000-1100°C. These are sealed process gas heater (THN or DNA class) with  blower or inline capability. High KW – High Flow.
  • Large Flow GTA – For high pressure vessel Airtorch use. Custom engineering. Please contact us directly for assistance.
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*Unit Life and Safety: MVTA units provide forgiveness for temperature exposures beyond their rated capacity by an extra 100°C.

Ask MHI about efficiency.   Ask about direct flow pressure drop minimization technologies.

High Power MVTA or High Pressure GTA. The typical Airtorch™ model output is up to 1200°C (~2150°F) depending on its rating. They offer high flexibility and good control of for process heaters.  Room temperature is assumed as 25°C for standard input in most models – whereas the (HI) models allow even a 600°C input.   Single Phase Power to Three Phase Choose from 1KW, 3 KW, 4 KW, 12 KW, 24KW, 36KW, 60KW, 120KW, 144 KW, 180KW, 216 KW, 300KW and higher.  Choice of pressure vessels.  Plug in Voltages 120V, 240V, 380V, 400V, 440V, 480V, 600V.

MTA

VTA

GTA

Temperature Lower Power (1-12 kW) High Power (36-400 kW)
600-900°C LTA, VTA, MTA925 MVTA-900-(THN) Models
900-1100°C (Custom), DNA MVTA-1000-(DNA) Models
1000-1200°C DPF Models, DNA-DPF (Custom)

and MVTA-DNA

High Pressure Enclosures Up to 900°C

Introduction to Airtorch™ | Airtorch™ Applications | Calculating Power vs Flow Rate | Easy Design Criterion

Properties of Gases & Moist Air with Temperature.   Why conserve energy.

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Very High Temperature

Operating Temperatures to 1200°C/~2150°F.  DPF models can take fan or blower input as well as a compressed air/gas input.

MHI special technologies allow for:

  • Incredible Warranty.
  • Inlet temperatures can be high on specific models MVTA.
  • Pressure drop: Very Low. MHI offers DirectFlow™ Airtorch.
  • We take advantage of our combined thermal knowledge across diverse equipment offerings to optimize and provide low friction Airtorch systems.
  • Quick Selection Guide: If the flow rate is is of the order of 2-40 scfm please choose MTA, VTA or LTA models or the MVTA925 models with flanges.  If the flow is higher than 40 scfm, please choose from the highly energy efficient MVTA models.
  • If the temperature required is above 1100°C please choose the DPF models.
  • When comparing Airtorch heating to other methods please note that the MHI Airtorch systems do not produce any appreciable sound.

Quick Units-Conversion : (800°C=1472°F) (925°C=1697°F) (1000°C=1832°F), (1100°C=2012°F) (5 Bar=0.5 Mpa)

Need higher temperatures? Please don’t hesitate to give us a call or contact us. The kW required depends on the temperature of the exit gas from the Airtorch™ models and the flow volume required. Please use Easy Design Criterion or please use this formula to calculate approximate temperature vs. flow rate for a fixed power for an Airtorch™ model number. MHI also provides flow rate vs. temperature for TA and DPF models. Request Graphs.

Allowed Air/Gas Inputs: Air/Gas from compressor or blower or fan may be attached (varies by model). Some Airtorch models also accept high temperature feed gas as an input. Airtorch™ models are highly efficient electric process heaters (inline, cross line and independently standing models are offered). DPF models have very low pressure drop associated with them. Inputs such as Gas Cylinders, Compressors, Blowers and even fans may be used depending on the model.

Airtorch Operation: The flow rate and temperature are connected. The heater cannot go beyond its rated temperature or power. The thermocouple is integral to the heater.The principle of an air/gas heater is for flowing gas to heat within the residence time of heater/configuration. The flow temperaturecurve is given on Power Vs Flow Calculator. This is shown for air and can easily be converted for different gasses and supercritical CO2  (sCO2) recuperators used for a Brayton cycle demonstration.

Flow Rate is Important: If using a blower or fan the air flow will be controlled by the characteritics of the fan or blower. Fans are employed when the drop in pressure of the system is no greater than approximately 50 in. w.c. (50 in. w.c./inches of H20 is approximately 1.8psi.) This condition remains true even when the fan output large CFM values. Blowers are considered in circumstances where larger pressure drops are present.

Every MHI Airtorch has a maximum power rating, a maximum temperature and a pressure rating (if rated to higher than 1 atmospheric pressure i.e. the GTA models). Please follow the curve on Easy Design Criterion while operating safely within the device ratings. The power should be fixed close to the rated power. Please observe limits with care. Please maintain a low flow cutoff sensor if used close to the highest rated temperature.  MHI Airtorch models are provided with multiple control and safety thermocouples plus other safety devices.

FAQ?. Whether to use Compressor or Blower?  What are MHI SmartDevices.

Ans: The Air torch units accept all inputs. The most important issue is to not fall below the minimum SCFM rating or temperature for the maximum rated power. Fans are employed when the drop in pressure of the system is no greater than approximately 10-50 in. w.c.

MHI Airtorch uses:  Industrial Equipment, Lab and Analytical Equipment Medical Equipment, Combustion Simulation, Military and Defense, Rubber and Plastics, Pharmaceutical,  Pharmaceutical Equipment, Transportation, Water and Waste Water, Commercial, Adhesive Activation, Food Service Process Heat, Chemical Reactions, Laboratory,  de-soldering Heat Staking,  Melting, Energy Processes, Climate safe benefit, Energy, Soldering, Welding- Brazing, Weld preheat, Semiconductor, Medical, Preheating Gasses High speed heat shrink, Curing adhesives, Hot Air Processor, Powder drying and high temperature high velocity regime, Automotive, Packaging & Sterilization, Paper/Printing, Bio-Fuels, Digestion, Semiconductor processing, Soldering/Brazing, Textiles, Semiconductor, Energy Processes, Nuclear, Bio, Diesel, Process heater, gas heater, powder, gas pre-heater, air-pre-heater, supplemental heater and many other process heating applications. Flow simulation whether combustion or high temperature viscous. wafer processing, metal finishing, Solvent drying, steam and air hybrid process heaters, Flow Air Heating, preheating, Hot Air Processor, Shrink Fitting, Synthetic Fabric Sewing. Pressure vessel, simulate, Baking, Laminating, Metal Working, Packaging, Plastic Welding, Sealing, Soldering and brazing, In-line heaters, Compact heaters, Parts cleaning, Biomass extraction , Bio- reclamation, Photo-resist material, Semiconductor processing equipment, Supercritical fluid heating, Solvent replacement, Test beds, Life Sciences, Air, Steam, sCO2, Photovoltaic, Semiconductor processing, Curing and Drying, Electronics, Efficient Heat Shrinking, Thermoforming/Sealing […]

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