Hoffman
Hoffman Air Valve 401429 74, 1/2" x 3/4" Straight Steam Unit Heater Air Valve
Quantity:
Steam Unit Heater Air Valve
Float-type thermostatic vent
Single non-adjustable port
1„2" NPT female and 3„4" NPT male straight shank
Install 6-10" (150-250mm) above horizontal returnand 18" (450mm) above the boiler water line
Maximum operating pressure 35 psig (2.4 bar)*(Drop away pressure - maximum pressure against which the ventcan open).
Maximum pressure 35 psig (2.4 bar)