PILOT SYSTEMS
NATURAL GAS FLAMES OF A 4011 PREMIX PILOT SET (4021 Pilot Tip with 4031 Pilot Mixer)
operating with 16 osi air, 7"w.c. mixture pressure (30,000 Btu/hr)
at stoichiometric air/fuel ratio
1 2 3 4 5 6 7 8 9 10 11
with 25% excess air (lean)
1 2 3 4 5 6 7 8 9 10 11
with 15% excess fuel (rich)
1 2 3 4 5 6 7 8 9 10 11
With 3"-4"w.c. mixture pressure (6-8 osi air--all available with 8 osi blower), flames are approximately 2/3 of length scaled, for 7"w.c.
For a 4015 Pilot Set (4025 Pilot Tip and 3065 Aspirator Mixer), flame length is 13"-14" with 16 osi air at the mixer, operating at stoichiometric air/fuel ratio.
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