REGULATORS
5 D
3 D
wide open when operating
"A"
air
control valve
to other burners
impulse line (cross- connection)
Limiting Orifice
4 pipe dia. (min) 10 pipe dia. (min)
gas
unions for easy removal
"C"
Burner (open or sealed-in type)
"D"
regulator diaphragm must be level
OPERATION OF A CROSS-CONNECTED AIR/GAS RATIO REGULATOR SUPPLYING A NOZZLE-MIX BURNER SYSTEM
The pressure at "A" goes through the impulse line to chamber "B." The regulator's valve then opens until the outlet pressure at "C" (and conveyed through a balancing tube to chamber "D") equals the pressure at "B." The diaphragm and valve then stop moving because pressures at "B" and "D" are balanced. The pressure in the chamber below the regulator diaphragm controls the flow through the regulator. The location and proper installation of the impulse tap is important. See page 9.
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