The principle of this Air Cushion Valves is to allow large quantities of air in the pumping main during separation, entrap the air, compressed it with the returning air column and expel the air under controlled pressure so as to dissipate the energy of the returning water column. An air cushion valve is thus provided. The valve mounted on TEE joint on the rising main at locations where water column separation is likely. The valve has a spring loaded air inlet port, an outlet normally closed by float, a spring loaded outlet poppet valve and an adjustable middle valve control orifice.
When there is sudden stoppage of pump due to power failure, partial vacuum is created in the main. With deferential pressure, the spring-loaded port opens and admits outside air into the main. When pressure in the main becomes near atmospheric. The inlet valve closes under spring pressure. The entrapped air is than compressed by returning water column till the poppet valve opens with float is dropped position, the air is expelled through poppet valve and controlled orifice under predetermined pressure thus dissipating the energy of the returning water column.
|Parent/Basic Material||Cast Iron, S.G. Iron, Cast Steel Stainless Steel|
|General Fluid Application||Clear Water Raw Water Irrigation Water|
|End Flange Standard||IS : 1538, IS : 6392, BS : 10, ANSI B 16.1, ANSI B 16.5, BS : 4504, AWWA C 207 Or Any Other Standard.|
|Manufacturing Range Of Size||NB 80 MM TO 300 MM|
|Rating||PN - 2, PN - 4, PN - 6 & PN -10|
- Leak Proof Sealing
- Robust Construction
- Trouble Free Service
- Inter Changeable Parts
- Easy Installation
- Long Life Service
- Low Maintenance
- Easy Maintenance
- No Throttling Effect