Ductile iron double orifice air valve, with GGG40 or GGG50 body, and ABS/wooden+EPDM ball or stainless steel ball, manufactured for use in water, waste water, sewage, steam and oil, being coated with epoxy power, the coated is make sure bigger than 250μm. The air valves all guarantee with zero leakage ( Class A), all valves are 100% testing before packing and delivery.

Main parts materials:

· Body: GGG40/GGG50

· Bonnet: GGG40/GGG50

· Stem: 2Cr13/SS304/SS316/Brass

· Ball: Wooden/ABS+EPDM/Stainless Steel