Capacity | 4011/4021 Pilot
Table 1
4021 Mixture P.
4031 Inlet Air P. "w.c. [osi] (mbar) 2.9"11 [1.7] (7) 5.8"11 [3.4] (14) 12.0"1 [6.9] (30) 22.5" 1 [12.9] (56) 29"11 1 [16.6] (72) 38" 111 [22.2] (95)
4031 Mixer DP
Air Flow
Capacity
Flame Length
"w.c. (mbar)
"w.c. (mbar)
scfh (Nm3/h)
Btu/h HHV (kW LHV) inches (mm)
1" (2.5) 2" (5.0) 4"1 (10) 7"1 (17) 9" (20) 12" (30)
1.9" (5) 3.8" (9)
120 (3.4) 165 (4.7) 245 (6.9) 325 (9.2) 370 (10.5) 425 (12)11
12,000 (3.5) 16,000 (4.7) 24,000 (7.0) 32,000 (9.4) 36,000 (10.5) 42,000 (12.3)
5" (130) 7" (180) 8" (200) 9" (230) 10" (250) 10" (250)
8.0" (20) 15.5" (39) 20" (50) 26" (65)
Table 1 above, and the figures below show pressures and capacity data for all 4011 pilot sets while burning. Note that these pressures, flows and flame lengths will vary depending on air/fuel ratio and burner mounting geometry, For most application set the air pressure into the 4031 mixer to 6-8 osi (10.5-14"w.c.) or mixture pressure to 3-5"w.c.
Maximum Mixture Pressure for stability or lighting with a cold tip firing in the open: 4021-12, 14, 16 (spark ignited) 12"w.c. / 4021-11, 13, 15 (manual) 9"w.c.
4021 PILOT FLAMES
Stoichiometric ratio and 7"w.c. mixture pressure, produced by 16 osi air into 4031 Mixer - - 30,000 Btu/h HHV.
The same 7"w.c. mixture pressure with air/ gas ratio set at 25% excess air.
The same 7"w.c. mixture pressure with air/ gas ratio set at 15% excess fuel.
Stoichiometric ratio and 1"w.c. mixture pressure (12,500 Btu/h HHV).
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Scale : length in inches
Bulletin 4011/4021 Page 2
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