There are four types for PWR pressure-relieving devices: direct acting safety valve, pilot-operated pressure relief valve, power-operated pressure relief valve and safety valve with auxiliaries.
The structure characteristics and operation principium of new type pilotoperated all open safety valve under low pressure and vibration working conditions are introduced.
介绍一种在超低压和振动条件下工作的先导式全启安全阀的结构特点及工作原理。
3
From the view of flow control, the method of cavitation resistance of a pilot-operated water hydraulic valve was investigated.