Ductile Iron DIN3352 flanged Double Orifice Air Valve

Ductile Iron DIN3352 flanged Double Orifice Air Valve also name air release valve,air relief valve 

Air valve body materials:ductile iron

Air Valve Design standard:DIN3352
Flange standard:DIN 2501
Test standard:BS6755

Work temperature:NBR≤80°C,EPDM≤120°C

Air valve DN size:DN40 to DN250 mm

Double orifice air valve that combines both large orifice & small orifice functions within one unit. The large orifice allows air to be expelled from the system during filling of a pipeline and admit air back into the system whenever sub-atmospheric pressure occurs. Air is vented from the system until water enters the valve and lifts the float against its seat, ensuring a tight seal. In the event of sub-atmospheric pressure in the system, the water level drops causing the float to fall from its seat and allow the admission of air.

During normal working of the main the small orifice releases the air which accumulates under pressure. With the main in operation, the float is normally against its seat. As air enters the chamber body the water level is depressed until a level is reached when the float drops from its seat, which allows air to escape. The consequent rise in water level returns the float to its seat.

Drawing

Air Valve Dimension and Weight

We are a pressessional manufacturer of ductile iron resilient seated gate valve,check valve,butteffly valve,air valve,and Y strainer.etc.in Fujian,China.

we manufacture DIN3352 F4 and DIN3352 F5 gate valve,and BS5163 gate valve,flanged gate valve and socketed gate valve for pvc pipe, Lug type butterfly valve,wafer type butterfly valve,and double eccentric butterfly valve,single orifice air valve and double orifice air valve,swing check valve,silient check valve and Y strainer etc.

We are China double orifice air valve(air release valve) manufacturer and supplier,welcome to contact us.