REGULATORS
gas flow
balancing diaphragm
balancing tube
gas flow to burner(s)
"A"
"L"
control diaphragm
spring "S"
adjust
ATMOSPHERIC REGULATOR (ZERO GOVERNOR)
This type of regulator is loaded by the controlled air pressure rather than by spring pressure and gives an outlet pressure at "A" equal to the pressure at "L" plus or minus the effect of the spring "S" adjustment. This type of regulator is shipped with spring set "Neutral", just supporting the internals. The balancing diaphragm minimizes the effect of inlet pressure changes on outlet pressure.
Bonded valve, facing
Valve seat
Body plug
Inlet test tap plug
Pressure tube
Balancing diaphragm
Spring
Gas diaphragm
Vent on diaphragm cover (not shown)
Cover plug
Spring adjusting plug
6
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