Sewage Air Valve
VAG-GA Fig 925 Sewage Air Release Valve
The Sewage Air Release Valve shall be float operated and shall incorporate a compound lever mechanism to enable the valve to automatically release accumulated air and gases from a sewage pipeline while the system is pressurized and operating.
The Air Release Valve shall close drop tight, incorporating an adjustable Buna-N orifice button. All internal metal parts shall be of stainless steel. The linkage/lever mechanism shall be able to be removed from the valve without disassembly of the mechanism. The float shall be of stainless steel and be capable of withstanding a 1000 PSIG test pressure.
The body and cover shall be of cast iron conforming to ASTM A126 Class B. Inlet connection shall be 2” or 3” NPT, or 4” FLG, as required. Outlet connection shall be 1/2” NPT.
When specified, the valve shall be supplied with a “Flushing Attachment” consisting of: bronze shut-off valves, quick-connect couplings and rubber hose, for back washing with clear water.
The Sewage Air Release Valves shall be as manufactured by GA Industries, Inc., their Figure 925 (formerly Figure SAR-3 or SAR-5).