1A, 1/8" ADJUSTABLE ANGLE STEAM RADIATOR AIR VALVE Excess Pressure Pump Model 21 140–200°F (60–93°C)

Model 21 140–200°F (60–93°C)

convector radiators and small heating units

DESCRIPTION & FEATURES: Excellent flow regulation and leak tight

so to change the rotation on the pumps simply loosen the bolt that holds the pump-end to the motor

– Coffee urns

1A, 1/8" ADJUSTABLE ANGLE STEAM RADIATOR AIR VALVE Excess Pressure Pump Model 21 140–200°F (60–93°C)Radiator Steam Vents Model 1A Part No. 401422 Air Valve (non vacuum) Float type vent Adjustable port for true proportional venting 6 port settings from slow (1) to fast (6) 18" NPT angle connection Maximum operating pressure 112 psig (0. 1 bar)* Maximum pressure 10 psig (0. 7 bar) *Drop away pressure (maximum pressure against which the vent can open). Hoffman Radiator Steam Vent Data Sheet