Pump GG25 Ductile Iron Air Release Valve For Vacuum Reliefing

Triple Orifice Air Valve Flange End

1. PRODUCT PROFILE

Triple function air release valve is installed at the pump outlet or in the water supply line to remove a large amount of air from the pipe or dischargea small amount of air collected at a higher level of pipeline into the atmosphere,so as to improve the efficiency of the pipeline and the pimp.Triple function air release valve evacuates air during filling or emptying pipes, suppress obstacles created by air when the pipeline works under pressure and facilitates the flow of water.

2. FEATURES

· Discharge air more flexible

· Preventing of the water hammer

· Discharging a high flow of air during the filling of the pipe.

· Automatic degasing of the air contained in the pipe under pressure.

· Admission of a high air flow for the draining of the pipe.

3. TECHNICAL SPECIFICATION

· Nominal pressure: PN10 / PN16 bar

· Size: 2”~ 8” (DN50 ~ 200mm)

· Materials: cast iron A126 B (GG25), ductile iron A536 65-45-12 (GGG40/50)

4. STANDARD

· Design & manufacturing: BS EN1074-4:2000

· Face to face: BS EN1074-4

· Flanged ends: EN 1092-2:1997, ASME B16.1/B16.42, AS4087

· Inspection & testing: EN 12266-1:2012

· Working temperature: 0 ℃ ~ + 80 ℃

5. APPLICATION

· Water projects

· Real Estate

· Water treatment industry

· Power plant

· Pump station

Working Principle

Pipeline filling During the filling of the pipe,the air evacuates, the float remains in low position. The water fills gradually the air relief valve, under the effect of the Archimedesthrust the edge of the seal ring and the surface of the float allows to have a tightness.The flow of the high orifice pressure being far more weak, it remains a air feeder thatevacuates slowly and allows a slow placement in pressure of the valve avoiding eater hammer. The unit is in under pressure and orifices of evacuation are sealed. Pipeline degassing The air accumulates during the functioning of the pipe.The low pressure float remains in place under the effect of the pressuredespite the decline of the level of the water.The air evacuates by the small orifice with the same mechanism that the precedingparagraph 2. Pipeline emptying In case of emptying of the network or rupture of the pipe,the low pressure float instantaneously allowing the arrivalof air and avoiding the placement in depression of the conduct.