SERIES 6600 is a single chamber sewage air valve, which designed to prevent dynamic closure under higher air velocity. Valves has double orifice and perform three functions. The three function of the valve shall include:
(1) Valves exhaust large quantities of air during the filling of a piping system and close upon liquid entry.
(2) Valve open to admit air during draining pipeline draining or in negative pressure conditions.
(3) valve releases accumulated air from a piping system while the system is in operation and under pressure.