Designed for deep well pump installations
Air/vacuum valves automatically exhaust large volumes of air a system
being filled and also allow air to re-enter the pipe line when
being emptied. In operation, when the system is filled, fluid reaches
the float as the air is discharged and closes the orifice. The
orifi ce will remain closed until the system pressure drops to near
atmospheric pressure and the float is no longer buoyed.
These valves do not release air that accumulates while the system is
fully pressurized and in operation. Use a straight air release valve
for removing air while systems are pressurized. These air/vacuum
valves have 316 stainless steel spherical floats which are designed to
exhaust large amounts up to sonic velocity without blowing shut.
Air vacuum valves with throttling valves are commonly used on
deep well turbine pump installations and are installed between the
pump and the check valve. They purge air at start up prior to the
check valve opening, and they break the vacuum when the pump
shuts down and water drains into the well after the check valve
closes. The throttling valve provides adjustable control of the rate
and pressure at which air is discharged during filling.
Valves listed below have cast iron bodies, stainless steel and a Buna-
N seat. Rated for 300 PSI WOG Additional sizes of air/vacuum
valves are available through 16" as are flanged valves.