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VTA and LTA Airtorch™ Models

This page shows small to medium KW models

Click for 3 Phase Heavy Duty Airtorch Models

If the flow rate is of the order of 2-40 scfm please choose from the MTA, VTA or LTA models or the MVTA925 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 (model dependent).

VTA 600-900C Models

VTA750-4GS, VTA-1GC,


VTA Airtorch models are process air heaters designed for use with fan/blower (maximum back-pressure of 50 w.c./inches of H20 ~ 1.8 psi.). 


VTA-1GC with fan- 120V

VTA-2GC with fan - 208/230/240V


VTA750-4GS with fan

VTA and LTA up to 850C. 10 kW

LTA Airtorch models are process air heaters designed for compressed air/gas input. LTA models offer temperatures up to 850°C. Exit and inlet diameters and threading is described below along with each model number.

LTA750-01, LTA750-02
LTA750-04, LTA-10


VTA900- 10BL


36 kW 1000C MVTA


Please click here Higher Power 3 Phase, High Temperature Models (MVTA and GTA Airtorch)

Please click here or on the adjacent pictures to view or contact for quick information and prices for LTA and MTA.  DPF (1200C)

DPF 1200C Airtorch

DPF (1200C)

MVTA925  MTA925-12 Airtorch


MVTA925-(1-12 KW)

GTA925- (1-12KW)

Flow Temperature Curves / 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.

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.

Request Quote for DPF Airtorch™

10kW power Airtorch VTA900-10BL - Use 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
All dimensions and accessory models are typical only. AIR CONNECTION


4kW 208/220/230/240 Call Call 4.0"
(100 mm)
(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)
(698.5 mm)
Call Blower/Please confirm with MHI the inlet and outlet dimensions of your specific unit 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

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.

Request Quote for DPF Airtorch™





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


Control Panel
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)  
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)
(470 mm)
Compressed Air 1/2" NPT 2" NPT
10 kW 220/230/240, Single Phase 850°C 11 SCFM, 21 SCFM HIPAN        

60kW and higher available see MVTA, please call MHI at 513-772-0404 for more information contact us.

All dimensionsshown above are typical/nominal.  Please contact MHI for specific dimensions relevant to your quotation.

Request More information about our VTA

Flowmeter 2-23 SCFM
Part # FLM750

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


VTA Accessory

LTA and VTA Accessories
Integral fan
Stainless steel casing

Flow-control Module - Optional with BL Models

Integral fan

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


Stainless Steel Casing

4 kW LTA
FANCS Units & Adaptors (required with fan models)
FANCS Control 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 use after months of steady use.  The life can be considerabley high when used carefully especially 100C below the maximum rated temperature.


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
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©Micropyretics Heaters International Inc. 1995 - 2019
750 Redna Terrace Cincinnati, OH 45215, USA
Telephone: 513-772-0404 | Fax: 513-672-3333