MHI Airtorch® Design Graphs

For flow calculations please contact MHI.

From 2 KW to 16 MW

Energy and Environment Improvement with an MHI Airtorch®.

The  Airtorch® may alsobe be used in a recuperative mode.

MHI can provide an Airtorch® unit for up to greater than 800°C in input temperature, Output up to 1200°C making the MHI DH add-on an ideal component for all large ovens.

Why do hundreds of customers prefer MHI for their best energy-efficient air heating needs? Now offering new and improved with an incredible warranty on heating elements. Please Contact MHI.

When comparing Airtorch® against heat exchangers, please note that the MHI Airtorch® units often save considerable energy because of their low pressure drop. This power loss could be substantial with heat exchangers. For example, if a flow of 0.6 kg/s is driven with a 5 Bar (~90 psi) pressure, then almost ~200 kW of power could be wasted for driving the flow compared to the Airtorch® systems that offer an extremely low-pressure drop (~ 1 PSIG). Or 2000KW if the ultra-low pressure drop Airtorch® models are used for 0.1 psig.

Please contact MHI for details.

Airtorch® Applications

Please review the properties of gases and formulas to use for power calculations.

1kW Savings per year is $876 @10c per kWh

10kW Savings per year is $8760 @10c per kWh

100kW Savings per year is $87600 @10c per kWh

Large Flow MVTA.  For 1000-1100°C. These are sealed process gas heaters (THN or DNA class) with a blower or inline capability. High KW – High Flow.

Large Flow GTA – For high-pressure vessel Airtorch use. Custom engineering. Please contact us directly for assistance.

Typical Conversion of Gas

LTA – Up to 900°C. LTA is a process heater for air that requires a compressed air input.

VTA – Up to 900°C. VTA is a process gas heater with a fan or blower with low flow sensor capability.

MTA925 and GTA – Up to 925°C/1100°C.  These are flow or inline sealed process gas heaters which can take compressed air or compressed gas input. New Models for MVTA-DPF-DNA Class.

DPF – Up to 1150°C-1250°C/~2200°F. DPF models can take fan or blower input as well as a compressed air/gas input.

Request Quote

N2 gas Weight Gas
pounds
(lb)
kilograms
(kg)
cubic feet
(scf)
cu meters
(Nm3)
1 pound 1.0 0.4536 12.83 0.36
1 kilogram 2.205 1.0 28.24 0.8
1 SCF gas 0.07245 0.03286 1.0 0.02832
1 Nm3 gas 2.757 1.2506 35.3 1.0
Scf (Standard cubic foot) gas measured at 1 atmosphere and 70°F.
Nm3 (Normal cubic meter) gas was measured at 1 atmosphere and 0°C.

Quick conversion mm H2O column difference to psi:

1 mm H2O column difference to psi = 0.00142 psi

50 mm H2O column difference to psi = 0.07112 psi

100 mm H2O column difference to psi = 0.14223 psi

Quick Conversion of bar to kPA

bar kPa
1 100
1.2 120
1.4 140
2.0 200

Parameters

Airtorch® Mode.  Heat from cold to hot quickly.

Airtorch® Recuperator Mode. SH models accept inlet up to 800°C.

Example-Air.  Use the blue-black line for steady state and cold start.

Use the purple line only in recuperator mode.

Conversions:

Actual: 1 m³= 35.31467 ft³

_________________________________________

Standard value (approximate Conversion)

1 Nm³/h is ~ 0.6 SCFM

Or

1 SCFM ~1.6 Nm³/hr.

_________________________________________

Power

1 MBH = 0.293 kW

The graphs below are for Air. Please contact MHI for N2, CO2, sCO2, CH4, Ar, He or other gases.
—————————————————————————————————–
1 cu.m = 61023.8 cu.in
For cubic inch to cubic meter for an approximate result, divide the volume in cubic inches by 61023.8

Psst: A very approximate way to theoretically calculate is SCFM = KW x 3193/∆T where ∆T is in °F. Use this method (and a little margin) for temperatures below 1200°F.  For higher than 1200°F Contact MHI.

Ideation

Process Air Heaters

Request for Quote

Airtorch Infographic

New and improved with incredible warranty on heating elements

MTA Low KW

Request Quote https://mhi-inc.com/airtorch-contact-form/

The following table is for converting between different pressure units.

1 psi = 0.068947 bar = 68.947 mbar = 0.068046 atmosphere.

psi bar mbar atm Kg/cm2 Pa kPa MPa ” H20 ft H20 cm H2O m H20 ” Hg mm Hg
(Torr)
cm Hg
1 0.068948 68.948 0.068046 0.070307 6,894.8 6.8948 0.0068948 27.680 2.3067 70.307 0.70307 2.0360 51.715 5.1715
14.504 1 1,000 0.98692 1.0197 100,000 100 0.1 401.46 33.455 1019.7 10.197 29.530 750.06 75.006
0.014504 0.001 1 0.0009869 0.001020 100 0.1 0.0001 0.40146 0.033455 1.0197 0.010197 0.029530 0.75006 0.075006
14.696 1.0132 1013.2 1 1.0332 10132 101.32 0.10132 406.78 33.899 1033.2 10.332 29.921 760.00 76.000
14.223 0.98066 980.66 0.96784 1 98066 98.066 0.098066 393.70 32.808 1,000 10 28.959 735.56 73.556
0.000145 0.00001 0.01 0.0000099 0.00001 1 0.001 0.000001 0.0040146 0.00033455 0.010197 0.00010197 0.000295 0.007501 0.00075
0.14504 0.01 10 0.0098692 0.010197 1,000 1 0.001 4.0146 0.33455 10.197 0.10197 0.29530 7.5006 0.75006
145.04 10 10,000 9.8692 10.197 1,000,000 1,000 1 4014.6 334.55 10197 101.97 295.30 7,500.6 750.06
0.036127 0.0024909 2.4909 0.0024583 0.00254 249.09 0.24909 0.0002491 1 0.083333 2.5400 0.025400 0.073556 1.8683 0.18683
0.43353 0.029891 29.891 0.029500 0.030480 2,989.1 2.9891 0.0029891 12 1 30.480 0.30480 0.88267 22.420 2.2420
0.014223 0.000981 0.98066 0.0009678 0.001 98.066 0.098066 0.0000981 0.39370 0.032808 1 0.010 0.028959 0.73556 0.073556
1.4223 0.098066 98.066 0.096784 0.1 9,806.6 9.8066 0.0098066 39.370 3.2808 100 1 2.8959 73.556 7.356
0.49115 0.033864 33.864 0.033421 0.034532 3,386.4 3.3864 0.0033864 13.595 1.1329 34.532 0.34532 1 25.4 2.54
0.019337 0.0013332 1.3332 0.0013158 0.001360 133.32 0.13332 0.0001333 0.53524 0.044603 1.3595 0.013595 0.039370 1 0.1
0.19337 0.013332 13.332 0.013158 0.013595 1,333.2 1.3332 0.0013332 5.3524 0.44603 13.595 0.13595 0.39370 10 1
New VSH Airtorch® Model

For 500Kw – 6 MW
New VSH Airtorch® Model