Shop Online
Search MHI
  • MHI Search
Temperature Converter

Enter a number
& click on
the "Calculate" button
°F= °C

 

VTA and LTA Airtorch™ Models

Quick Guide

If the flow rate is is of the order of 2-40 scfm please choose from the MTA, VTA or LTA models or the MVTA925 for flanged units

If the flow requirement is higher than 40scfm please choose from MVTA models

Airtorch units are supplied with several safety features like the over temperature cut-off feature and the low flow cut-off feature


36 kW 1000C MVTA DPF 1200C AirtorchMTA 925 MHI Single and 3 Phase High Flow Airtorch Systems 

Airtorch Application Information Page

  • Airtorch Operation:   The flow rate and temperature are related.   The air/gas heater should not be used 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.  
  • 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 fans output large CFM.. Blowers are considered in circumstances where larger pressure drops are present.
  • For LTA and MTA when the inlet flow is pressure driven, the flow rate is often set by an appropriate SCFM flow meter.  Minimum flow rate rated for the should be maintained when powered.  MHI power controllers cmay be used to set the power.

 

 

Flow Temperature Curves

 

4 kW VTA VTA750-4GS with fan

VTA750-4GS

850°C (1562°F) VTA

1kW VTA

600°C VTA

 

Airtorch™ System Introduction

VTA Models

 

VTA models include an integrated Type "K" thermocouple. The VTA models are highly energy efficient, allowing for less energy use and cost savings. VTA models are fully compatible with MHI electronic control panels, allowing for accurate control of flow rates and temperatures for your process. Suggested uses for these models include integration into existing heating systems for cable conveyors, drying, process heating, coatings, production line heat treating and a number of other specific process applications.

Most units are compatible with an optional control panel. Contact us or call us at 513-772-0404.  VTA-BL models have integrated air/gas controls.   VTA models offer low flow cut-off with extendable user interface. Fan control is available with the FANCS, which also includes a temperature controller.


Schematic of Blower, Air Flow Valves and Low Flow Safety Features Provided by MHI are shown in the adjacent picture.

 

 

10kW power Airtorch VTA900-10BL - Uuse up to 900°C
Designed for Energy Efficient Fan/Blower Inlet

Flanged to pipe models including GTA

Typical MHI Blower and Low Flow Cut off Safety System


MHI Airtorch Systems are offered with variable input attachments that suit customer requirements. The blower,valve and low flow attachments are

shown for the VTA900-10BL

 

Model Power Voltage Max Temp Max CFM @ Max Temp Diameter> Height Air Supply Inlet Integrated with Fan or Inlet Accepts Blower Exit
AIR CONNECTION

VTA750-4GS

4kW 208/220/230/240 Call Call 4.0"
(100 mm)
27.5"
(698.5 mm)
Fan model: MK4XL Fan/Blower 2" NPT
VTA900-10BL 10kW 208/220/230/240 900°C Call 7.0"
(177.8 mm)
27.5"
(698.5 mm)
Call Blower call
3-Phase Custom (high kW) 240/440/480

Variable

700 -1100°C

Call/Contact Call/Contact Depends on Model Typical 10-20 inches Diameter and about 50" Length.
** : FANCS: Fan speed controller and temperature indicator

LTA Models

LTA
Up to 850°C
Designed for Compressed Air or Gas Inlet

LTA Models allow for easy idependent control of power and flow-rate. LTA Airtorches™ are to be used with compressed air and power controller.

LTA's are highly energy efficient, but not used where complete sealing is required. For sealed units please click to MVTA and MTA models.    LTA models are fully compatible with electronic control panels, allowing for accurate control of flow rates and temperatures for your process. Suggested uses for these models include integration into existing systems for cable conveyors, drying, process heating, coatings, production line heat treating and a number of other specific process applications.  LTA models are not designed to be as well sealed like MTA and MVTA models so should not be used with all gasses.  Please contact MHI for free die-heating Powerpoint presentation and ROI case studies.

*At full power the minimum flow required is higher. This is also minimum airflow required when fully energized to rated kW.

All LTA models feature an optional Temperature Indicator module.

 All LTA models feature an integrated Type K thermocouple.

Note that dimensions are to be read within a standard tolerance.

Flow Rate vs. Temperature Charts. MHI units feature a nearly 100% power transfer efficiency. 

Compressed Air/Gas Based (LTA) Compared to Blower Based (VTA)
High Pressure Models (GVTA/GTA)

Set the LTA flow with a SCFM flow meter.

1KW LTA

 

 

 

 

LTA750-01

LTA750-02
LTA750-04

 

LTA750-04

Back of LTA750-04 showing air/gas inlet

t/c wire

and power cable

Nominal Power Voltage Maximum Rated Temperature

Nominal SCFM @ Max Temp, 60% Power*, 100% Power

Approximate

Control Panel
(Recommended)
Heat Tube Diameter System Height Air/Gas Supply Inlet Exit
1kW 115/120, Single Phase 850°C 1.4 SCFM, 1.8 SCFM BPAN 2.1"
(53 mm)
15.25" (387 mm) Compressed Air 1/4" NPT 1/4" NPT
2kW 208/220/230/240, Single Phase
(115/120 is Special Order)
850°C ~4.0 SCFM, 5.3 SCFM BPAN 3.3"
(86 mm)  
14.75"
(374mm)
Compressed Air 1/4" NPT 1/2" NPT
4kW 220/230/240, Single Phase 850°C 8.0 SCFM, 11 SCFM BPAN 4.0"
(100 mm)
18.5"
(470 mm)
Compressed Air 1/2" NPT 2" NPT
10 kW 220/230/240, Single Phase 850°C 11 SCFM, 21 SCFM HIPAN Request More information about our VTA Request More information about our VTA Request More information about our VTA Request More information about our VTA Request More information about our VTA
60kW and higher available see MVTA, please call MHI at 513-772-0404 for more information contact us.


Flowmeter 2-23 SCFM
Part # FLM750
  

Call 513-772-0404 to discuss or email us.




 

VTA Accessory


LTA and VTA Accessories
4kW VTA
4kW VTA-4GS
Integral fan
Stainless steel casing

Flow-control Module - Optional with BL Models

1kW VTA
1kW VTA-1GC
Integral fan

 


Minimum Flow detection and cut-off module supplied standard with VTA900-10BL

1KW LTA

1kW LTA
Stainless Steel Casing


4 kW LTA
FANCS Units & Adaptors (required with fan models)
FANCS UNIT
FANCS Control Unit
FANCS UNIT
FANCS Control Unit - Front
Airtorch adaptors
Outlet Adaptor


Flowmeter 2-23 SCFM
Part # FLM750
  

Call 513-772-0404 to discuss or email us.

 

VTA Photos
VTA900-10BL
VTA900-10BL use after months of steady use.  The life can be considerabley high when used carefully especially 100C below the maximum rated temperature.

VTA900-10BL
VTA900-10BL in Use.

For best life, MHI controls are recommended.  Controls provide overtemperature and other safety interlocks when offered.

  VTA Installation
Schematic example of VTA in use for  preheating and continuous heating of a extruder charge. An XPAN control system is shown.

LTA Accessories

LTA Accessories

LTA Airtorch™ Heater Accessories
NPT Nozzle NPT Nozzle with fitting for pipe extension
FS750-A - Adjustable flow rate detection valve and switch
FS750 - Flow rate detection valve and switch
FLM750 - Flowmeter 2-23 SCFM (click for larger images)
FTB750-6 - 6' Air/gas supply tubing
 

Knife Nozzle (Not Available from MHI).  Picture shown only for ideation.

Flat nozzles dissipate more heat than round nozzles.Knife Nozzle

MTAR - Moisture trap ensures dry air to AirtorchTM
Request More information about our VTA
LinkedIn  Twitter  MHI Google Plus  Facebook  YouTube    MHI Certification

©Micropyretics Heaters International Inc. 1995 - 2017
750 Redna Terrace Cincinnati, OH 45215, USA
Telephone: 513-772-0404 | Fax: 513-672-3333