Removes entrained air from pressurized water systems to
minimize water hammer
Air release valves automatically exhaust small amounts of air
that collect in system high points once the system is filled and
Air bubbles enter the top of the chamber and eventually displace
liquid within the valve and lower its level to where the
float is no longer buoyant. The float drops, which opens the
valve seat and allows accumulated air to be exhausted to atmosphere.
The liquid level then rises, raises the float, which, in
turn, closes the valve seat.
Valves listed below have cast iron bodies with stainless steel
internals and are rated 150 psi working pressure. Valve sizes
through 1" have 3/32" orifices with 1/4" FNPT outlets and the
2" has a 3/16" orifice with a 1/2" FNPT outlet port.
Other sizes are available through 6" and 300 psi working pressure.