MVTA models are process-gas heaters designed for reactive and combustible gas input. MVTA models offer temperatures up to 1000°C. LTA models work with compressed air. Exit and inlet diameters and threading is described below, along with each model number.
For extremely low flows, ~0.5 SCFM up to 1200°C. They are typically used for Fuel Cell Laboratory Demonstrations.
Airtorch® units have several safety features like the over-temperature and low flow cut-off features (model dependent). Please click on the individual model for more information, including price and delivery. If the required exit temperatures are above 925°C, please send a request to MHI with details of the request, and we will offer the most suitable model for you. Please always feel free to contact us.
Why use Electrical Controls? For any Airtorch® with fixed power, there is a flow rate that will give you the maximum temperature or a higher flow rate that will give you a lower temperature. For example, the LTA-10 will provide a 900°C exit temperature with ~20 SCFM. The unit plugs into any voltage between 208 and 240 V single phase.
The XPAN or BPAN-O-PLUS (Electrical Control Panel) can do the following. (1) Set the maximum temperature (or allow programmed temperature) not to be exceeded at any flow rate that is in the flow-temperature envelope, (2) Use the OTC function to not exceed a temperature at any location that you choose, and (3) provide a soft start with the phase-angle-controlled SCR so that the unit operates smoothly, thereby enhancing life.
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 the heater/configuration.
Flow Rate is Important: If using a blower or fan, the airflow will be controlled by the fan’s or blower’s characteristics. 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 more significant pressure drops are present.
When the inlet flow is pressure-driven for LTA and MTA, the flow rate is often set by an appropriate SCFM flow meter. The minimum flow rate rated for the should be maintained when powered. MHI power controllers may be used to set the power and temperature.
Please click on the tabs below for more information
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 several 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 an 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 are provided by MHI are shown in the adjacent picture.
LTA Models allow for easy independent control of power and flow-rate.
LTA Airtorch® models are to be used with compressed air and power controller.
LTA’s are highly energy efficient, but not used where complete sealing of the unit is required 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.