Description
LTA750-04 Airtorch® Heavy-Duty Industrial Air Heater System
Overview
The LTA750-04 Airtorch® is a 4 kW cartridge-style industrial hot air generator designed for high-temperature process heating applications requiring continuous hot air discharge up to 925°C, with intermittent operation reaching 950°C. Its rugged steel-shell design provides efficient heat recovery, reduced radiant heat loss, and enhanced thermal performance.
Designed for operation with compressed air and compatible gases at approximately atmospheric pressure, the LTA750-04 is ideal for industrial heating, drying, plastic processing, heat treatment, and other demanding thermal applications.
Important Safety Notice:
Portions of the heater surface may exceed 50°C during operation and can become significantly hotter at elevated temperatures. Do not touch heated surfaces during operation. Users should wear appropriate heat-resistant gloves, eye protection, and other required personal protective equipment (PPE).
Key Features
- Heavy-duty cartridge-style hot air generator
- Continuous operation up to 925°C
- Intermittent operation up to 950°C
- Nominal 4 kW power output at 240 VAC
- Built-in Type K thermocouple on select models
- Recuperative steel-shell design for improved efficiency
- Reduced radiant heat loss
- Suitable for industrial process heating applications
- Compatible with compressed air and non-reactive gases
- Designed for approximately atmospheric pressure operation
Temperature Performance
Operating Temperature Range
- Outlet temperature range: 40°C to 950°C
- Typical continuous operation: Up to 925°C
- Maximum intermittent operation: 950°C
- Temperature varies based on airflow rate and available electrical power
High-Temperature Operation
For temperatures above 870°C, MHI strongly recommends:
- BPAN-O-PLUS precision power controller
- High-accuracy mass flow meter
- Continuous temperature monitoring
Accurate flow control is essential to maintain safe and stable operation near maximum temperature limits.
Power Specifications
Model
LTA750-04
Electrical Requirements
- Single Phase
- 50/60 Hz
- 220V / 230V / 240V operation
- Nominal power rating: 4 kW @ 240 VAC
Power Output by Supply Voltage
| Supply Voltage | Approximate Power Output |
|---|---|
| 208 VAC | ~3.3 kW |
| 230 VAC | ~3.9 kW |
| 240 VAC | 4.0 kW (Nominal) |
| 277 VAC | Restricted to approximately 500°C output with BPAN-O-PLUS controller |
For operation at 277 VAC, use of the BPAN-O-PLUS controller is required and maximum discharge temperature is limited to approximately 500°C.
Connections
Air/Gas Inlet
- 1/2″ NPT Male (NPTM)
- Maximum inlet gas temperature: 75°C
Outlet
- 2″ NPT connection
Airflow Requirements
Proper airflow must always be maintained to protect the heater and achieve target temperatures.
Minimum Recommended Airflow
- Approximately 8 SCFM minimum at full power
When operating near the maximum temperature range:
- Continuously monitor process temperature
- Ensure airflow remains above the minimum recommended value whenever power is applied
- Avoid low-flow conditions that may result in overheating
Typical System Configuration
A common installation includes:
- Compressed air or compatible gas source
- Flow meter for precise airflow adjustment
- Airtorch® heater (LTA or MTA series)
- Optional BPAN-O-PLUS controller for temperature and power regulation
Both LTA and MTA products require a properly sized flow meter to establish and maintain correct operating conditions.
Construction and Design
The LTA750 series incorporates a specialized steel-shell construction that improves thermal efficiency through heat recuperation.
Benefits Include
- Improved heat recovery
- Reduced radiant heat loss
- Enhanced thermal efficiency
- Improved temperature uniformity
- Cooler outer shell temperatures compared with conventional designs
While the outer shell is cooler than many traditional heater designs, portions of the unit will still become hot during operation and require suitable precautions.
Applications
The LTA750-04 is suitable for a wide range of industrial heating processes, including:
- Combustion and burner support
- Plastic welding
- Heat shrinking of thermoplastics
- Plastic forming
- Ceramic drying
- On-site heat treatment
- Industrial drying processes
- Laboratory and pilot plant testing
- General process heating applications
Instrumentation and Controls
Integrated Thermocouple
Many LTA750-04 models include an integrated:
- Type K thermocouple
- Process temperature monitoring capability
Recommended Control Option
BPAN-O-PLUS Controller
For optimum performance, especially above 870°C, MHI recommends the BPAN-O-PLUS for:
- Precision power control
- Temperature regulation
- Process stability
- High-temperature operation
- Over-temperature protection
Product Availability Notice
Due to inventory, customer requirements, electrical considerations, or supply conditions, MHI may substitute the LTA750-04 with the higher-performance MTA925-04 Sealed Process Heater when appropriate.
The MTA925-04 offers:
- Similar 4 kW power rating
- Enhanced performance characteristics
- Sealed process heater design
- Higher-value industrial heating solution
Substitutions will be made only when necessary to satisfy order requirements and product availability.
Safety Information
Hot Surface Warning
During operation:
- Exterior surfaces may exceed 50°C
- Areas near heated zones can become significantly hotter
- Direct contact may cause burns
Always use:
- Heat-resistant gloves
- Safety glasses
- Appropriate PPE
- Proper equipment guarding where required
Operating Limits
- Maximum inlet gas temperature: 75°C
- Atmospheric-pressure operation only
- Stable airflow required during operation
- Flow must be matched to heater power input
Additional Notes
- Product images are for illustration purposes only and may not represent the exact configuration supplied.
- Actual operating temperatures depend on airflow rate, inlet conditions, electrical supply voltage, and process environment.
- Accurate flow measurement becomes increasingly important as operating temperatures approach the maximum rated range.
Summary
The LTA750-04 Airtorch® Heavy-Duty Industrial Air Heater System is a rugged 4 kW cartridge-style process heater capable of delivering continuous hot air temperatures up to 925°C and intermittent temperatures up to 950°C. Featuring efficient heat recovery, flexible voltage options, integrated process temperature sensing, and compatibility with advanced BPAN-O-PLUS controls, it is an excellent solution for demanding industrial heating, drying, and thermal processing applications.
Unit Features:
- Steel Shell Construction (LTA or MTA versions)
- Built-in Type K thermocouple
- Lightweight with a compact, ergonomic design
- 208/220/230/240V plug-in design
- Rapid heat-up
- Compressed Air/gas compatible
- Outlet 2″ NPT. Inlet 1/2″ NPT male
Specs:
- Dimensions: Unit: 4.0″ dia x 15.5″ L (slightly different for the MTA925-04 when susbstituted)
- Air Inlet: Compressed Air or Gas (DO NOT USE COMBUSTIBLE GASES) Air Outlet 2″ NPT fitting. Inlet 1/2″ NPT male.
- Weight: Lightweight with a compact, ergonomic design
- Temperature: ~900°C continuous or sometimes even 950°C with intermittent use for the MTA925. If an MTA is substituted for an LTA, the unit will be rated to the LTA temperature.
- Airflow: ~6.5 to 8 SCFM for 900C (maintain minimum otherwise Airtorch™ may burn). For temperatures above 850 °C, please use the BPAN-O-PLUS temperature and power control; – for high temperatures, please consider using the MTA925-04.
- Voltage: 208/220/230/240VAC Frequency: 50/60 Hz
- Current: ~ 18 Amps @ 208/220/230/240VAC 4 kW Total Power (Nominal @ 240V). 4 KW is the power at 240 V. If the supply is 208 V, please note you will only obtain a maximum of ~3.3 KW. For 230V, the power draw will be 3.9 KW.
- Power Consumption: ~ 4000 Watts Output Nominal at 240V Single Phase.
- Optional Power Control: The optional BPAN-O-PLUS allows you to vary the output temperature by changing the airflow or the output power.
- The flowmeter is not included.
- Standard Accessories:
- Display – Not included
- Built-in thermocouples can be linked for external display.
- If a Control Panel is required. The BPAN-O-PLUS is recommended. Please click here.
MHI Inc. USA
MHI Inc
MHI Inc., USA
MHI Inc.,, USA
