Description
MHI MTA925-04 Airtorch® Process Air/Gas Heater
Overview
The MHI MTA925-04 Airtorch® is a 4 kW Process Air/Gas Heater designed for heating a variety of non-combustible and non-reactive gases in a sealed, near-atmospheric pressure system. This long-life model delivers continuous hot gas temperatures up to 925°C, making it ideal for industrial heating, process applications, and decarbonization initiatives.
Key Features
- Continuous hot air/gas discharge temperatures up to 925°C
- Maximum temperature limit of 950°C
- 4 kW nominal power at 240 VAC
- Stainless steel shell construction
- Built-in Type K process thermocouple
- Plug-in design for quick installation
- Suitable for Air, Nitrogen, Argon, and other non-reactive gas mixtures
- Approximately 18 in. long × 5.5 in. diameter
- Designed for operation at approximately 1 atmosphere pressure
Specifications
Temperature Range
- Operating temperature: 200°C to 950°C
- Continuous discharge temperature: Up to 925°C
- Based on air with approximately 60°C inlet temperature at maximum power
Gas Compatibility
Approved for:
- Air
- Nitrogen
- Argon
- Non-reactive gas mixtures
Not approved for:
- Combustible gases
- Ignitable gases
- Reactive gases
- Pressurized applications
Steam Applications:
If used with steam or steam mixtures, indicate this in the remarks section during checkout. Only dry, non-condensing input steam is permitted.
Power Requirements
| Supply Voltage | Approximate Maximum Power |
|---|---|
| 208 VAC | ~3.3 kW |
| 230 VAC | ~3.9 kW |
| 240 VAC | 4.0 kW (Nominal) |
Electrical Specifications
- 208/220/230/240 VAC
- 50/60 Hz
- Wiring to unit provided
- Wall connection plug supplied by customer
Gas Flow Performance
At 4 kW power:
- Air or Nitrogen flow: approximately 6.5 SCFM
- Achieves approximately 925°C outlet temperature
For operation above 850°C, MHI strongly recommends:
- A suitable flow meter
- A BPAN-O-PLUS power controller
Connections
Inlet
- 1/2″ NPT Male threaded connection
Outlet
- 2″ NPT Male threaded connection
Control Options
BPAN-O-PLUS Controller
Recommended for optimal performance and temperature control.
Features:
- Temperature control
- Power control
- Over-temperature protection
Available with the following options:
- UL certification
- cUL certification (Canada)
Independent Control Options
Optional systems are available for:
- Independent power control
- Independent flow control
- Combined power and flow control
Optional Mixer Nozzle
An optional insulated Mixer Nozzle (availability may vary) provides:
- Three-way gas input capability
- Additional gas inlets at the Airtorch® exit
- Insulated nozzle construction
Flow Meter Recommendations
When selecting a flow meter, always specify the gas type in the remarks section.
For Temperatures Above 800°C
Mass flow meters are strongly recommended because they provide greater accuracy than float-type meters.
If using a float-type gas flow meter:
- Ensure it is calibrated for the specific gas
- Use a range accurate between 6.5 and 12 SCFM
- Verify suitability for operation near the heater’s maximum rated temperature
Installation Notes
- No mounting brackets are included
- Horizontal saddle supports or mounting brackets are the customer’s responsibility
- Minimum flow rates must be maintained during operation
- MHI BPAN-O-PLUS controllers may be used to regulate both temperature and power
Safety Information
Surface Temperature
The external shell temperature varies by location:
- Areas near the outlet may become very hot
- Surfaces may be hot to the touch during operation
Appropriate safety measures should always be used, including:
- Thermal protection equipment
- Heat-resistant gloves
- Suitable guarding where required
Operating Limitations
This Airtorch® is intended only for:
- Non-combustible gases
- Non-reactive gases
- Non-pressurized operation
Input gas temperature should not exceed approximately 60°C.
Summary
The MHI MTA925-04 Airtorch® provides reliable, high-temperature gas heating up to 925°C continuous operation with rugged stainless-steel construction, integrated temperature sensing, and optional advanced process controls. It is an ideal solution for process heating applications requiring clean, electric heat for non-combustible gases at atmospheric pressure.
MHI MTA925-04 is a Process Air/Gas Heater (4kW). This is a one-atmosphere sealed system for heating various non-combustible gases. Long Life models. Dimensions are about 18 inches long and 5.5 inches in diameter. Use in the temperature range of 200°C to 950°C.
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• Shipping & Insurance charges are estimated for one (1) Spiral Heater only and do not include additional heaters or selected options. Actual shipping charges and weight will be confirmed with your order confirmation.
• Packaging & Handling charges are estimated for one (1) Spiral Heater only and do not include additional heaters or selected options. If additional Heaters or Options are chosen the Packaging & Handling cost will be adjusted at the time of order.
• Credit Card processing fee: 4% (U.S.), 5% (International)
MHI Inc
MHI Inc. USA
MHI Inc. USA
MHI Inc. USA
MHI Inc. USA