2
Midco
International
Inc.
8471 34
Speci
fi
cations
Speci
fi
cations
*Firing Rate .............................................................. Up to 750,000 Btu/hr/ft
750,000+
Contact
Midco
Burner Manifold Pressure
Natural Gas ................................................. 4.2 to 8 inch W.C.
Propane Gas .............................................. 1.6 to 3 inch W.C.
Pilot Capacity ............................................................ 12,000 Btu/hr
Pilot Manifold Gas Pressure
Natural Gas ................................................. 3.5 inch W.C.
Propane Gas .............................................. 2.0 inch W.C. **
Pressure Drop Across the Burner ............................ 0.05 to 1.4 inch W.C.
Air Velocity Across the Burner ................................... 800 to 4,000 FPM
Burner Turn-down Ratio ........................................... 30 to 1 (based on Btu / ft)
Flame Length ....................See page 5 for
fl
ame length Chart 5, and Tables 2 & 3
* Firing rate is dependent on the pressure across the burner. Please see the included
charts for recommended burner sizing.
** Using a natural gas pilot on propane.
***
See Page 14, Figure 6 for burner con
fi
guration reference.
****
See Page 15, Figure 7 for pilot con
fi
guration reference
Midco International Inc. reserves the right to change the construction or con
fi
guration of its products at any time.
All information is based on laboratory testing. Di
ff
erent unit size and/or con
fi
gurations may a
ff
ect data.
Cast Iron (CI)
Aluminum (AL)
*** Burner Con
fi
gurations
HMA 2
HMA 2A
HMA 2
HMA 2A
2
″
Straight Section (2A only)
-
-
-
1020810
6
″
Straight Section
1050700
1050710
1050800
1050810
6
″
Straight Section with Back Inlet 1230700
1230710
1230800
1230810
12
″
Straight Section
1010700
1010710
1010800
1010810
12
″
Straight Section with Back Inlet 1060700
1060710
1060800
1060810
Elbow Section
1070700
1070710
1070800
1070810
Tee Section
1080700
1080710
1080800
1080810
**** Pilot Con
fi
gurations
Part #
Natural #
Propane #
Brute Pilot Spark Rod and Flame Rod
1190850
1190950
Brute Pilot Spark Rod and UV Mount
1200350
1200450
Brute Pilot Spark Rod
1342-03
Brute Pilot Flame Rod
1360-03
(Direct) Spark Rod and Flame Rod
1190800
1190900
(Direct) Spark Rod and UV Scanner Mount
1200300
1200400
Remote Flame Rod
1220800
Remote UV
1240800
Pilot with Spark Rod only
1210800
1210900
Flame Rod
(Direct Spark, Std + Brute)
1360-03
Spark Rod
(Direct Spark)
1342-06
Table 1
- Burner and Pilot Con
fi
gurations
