Extraction non-return valve

source：Xiamen, rhett fluid control co., LTD The information has been viewed： 4425 Time：2013-07-03 13:47:25


The series products are mainly used in steam system in 600MW thermal power steam turbine, to prevent the media or the water flow back, to protect the turbine pumps and other important facilities. The performance requirements for medium in pipeline flow, power outages, accidents and other unusual conditions, the valve is closed instantly, closing time less than 0.5 seconds.
Product features:
■ when the forward flow medium, the cylinder cavity inlet, acting together with the hammer, the valve in the open position of balance. When the medium is the reverse flow, the cylinder piston cavity pressure relief valve quickly, quick closing valve in 0.5 seconds
Surfacing Crl3 series stainless steel or cemented carbide, sealing, good abrasion resistance, reliable and stable sealing performance.
■ hammer through an extension rod and a shifting fork on the pin shaft, with heavy torque balance and rocker, prevent the occurrence of water hammer phenomenon. When the forward flow of media, help to open the valve, the valve and keep the stable and reduce vibration in operation.
Technical parameters:
■ nominal size: NPS2 "NPS32" DN50 to DN800
■ nominal pressure: Class150 ~ Class 900 PN1.6 ~ PN10MPa
■ design standard: ASME B16.34 JB/T3595
■. Structural length: ASME B16.10 JB/T3595
■ applicable temperature: -29 ℃ ~ 593 ℃
■ flange end: customer requirements
■ test and inspection: API 598 JB/T 9092
The material of main parts:
Body: WCB WC6 CF8 CF8M CF8C CF3 CF3M
Gate valve / seat: + hard alloy steel (STL6 STL8) or stainless steel or alloy steel
Pin: A182 F6a F304 F316 F321