安全阀用以防止锅炉、压力容器等设备或管道因超压而发生损坏的阀门。当压力略高于正常工作压力时,安全阀自动开启,使压力下降。当压力略低于正常工作压力时,安全阀自动关闭,停止排放流体并保持密封。

      减压阀是将压力高的介质降为压力低的介质的设备,该阀的特点,是在进口压力不断变化的情况下,保持出口的压力和温度值在一定的范围内。无论进口压力如何变化,都把出口压力减到额定值,起到减压作用。

  泄压阀主要是用在压力过大的场合,当压力大于设定值时阀内片被顶开及时释放压力,压力减小后恢复到原来的位置,和安全阀区别不大,泄压阀多指用于液体的,安全阀多指用于气体,蒸汽的。

  稳压阀是将一个区域内的介质保持在一定的压力范围的设备,无论下游压力和需求量如何变化,都维持一个恒定的上游压力。

  安全阀及减压阀是两种阀门类型,其中,安全阀属于安全泄发装置,是专用阀门,只在工作压力超过允许范围时动作,对系统起到保护作用。减压阀属于工艺阀门,可使高压物流减压,以满足后系统对压力的要求,其工作过程是连续的。



Safety valve to prevent the boiler, pressure vessels and other equipment or pipeline due to overpressure damaged valve. When the pressure is slightly higher than normal operating pressure, the valve automatically opens, the pressure drop. When the pressure is slightly lower than the normal working pressure, the valve automatically closes, stop the discharge of the fluid and seal.

High pressure valve is reduced to medium equipment for low pressure medium, the characteristics of the valve, is in the inlet pressure of changing circumstances, to maintain the outlet pressure and temperature in a certain range. No matter how the change in inlet pressure, outlet pressure reduced to regard the ratings, play decompression.

The pressure relief valve is mainly used in the excessive pressure of the occasion, when the pressure exceeds the set value valve opening time was the top film to release the pressure, the pressure decreases and then restored to its original position, and a safety valve, little difference, the pressure relief valve more than that for the liquid, safe multi-valve means for gas, steam.

Regulator valve is a region of medium is kept at a certain pressure range of equipment, no matter how the downstream pressure and demand change, can maintain a constant upstream pressure.

Safety valve and pressure reducing valves are two types, of which, the safety vent valve is made device, which is a special valve, only when the action exceed the allowable range in the working pressure, the system play a protective role. Valve is the valve technology, enables high logistics decompression, the pressure to meet the requirements of the system, its work process is continuous.













安全阀的选用对象

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