Hoffman 1A, 1/8" Adjustable Angle Steam Radiator Air Valve

Features: Air Valve (non-vacuum) Float-type vent Adjustable port for true proportional venting v 6 port settings from slow (1) to fast (6) 1/8" NPT angle connection Maximum operating pressure 1.5 psig (0.1 bar) (Drop away pressure - maximum pressure against which the vent can open). Maximum pressure 10 psig (0.7 bar)