Sewage Combination Air Release Valve-PN

Advanced design with simple mechanism, strong float to prevent cracking during sudden water hammer& quick closure.
Aerokinetic mechanism to resist blow shut under higher air velocity even up to sonic velocity of air.
Bottom rubber buffer for collision prevention, and drain easy with proper holes around the cage during vacuum. Outside screen will be an option for safety and prevent insects or birds in.
No arms or levers to prevent vibrating, bending, direct closure of the float.Smooth cage outside of the float, keep float moving in specified guide rail.
Comply with BS EN 1074-4