价优直销北京华德换向阀4WE6M61B/CW220-50NK4

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北京华德液压全系列 具体型号及报价请联系客服

北京华德换向阀部分型号如下：

4WE6M61B/CG12N9K44WEH10F20B/6EW220-50NTZ4

4WE6M61B/CG12NDKL4WEH10F20B/6EW220-50NTZ5

4WE6M61B/CG12NDL4WEH10F20B/6EW220-50NTZ5L

4WE6M61B/CG12NK44WEH10F20B/6EW220-50NZ4

4WE6M61B/CG24N9DKL4WEH10F20B/6EW220-50NZ5

4WE6M61B/CG24N9DL4WEH10F20B/6EW220-50NZ5L

4WE6M61B/CG24N9K44WEH10G20B/6AW220-50NETZ4

4WE6M61B/CG24NDKL4WEH10G20B/6AW220-50NETZ5

4WE6M61B/CG24NDL4WEH10G20B/6AW220-50NETZ5L

4WE6M61B/CG24NK44WEH10G20B/6AW220-50NEZ4

4WE6M61B/CW220-50N9DKL4WEH10G20B/6AW220-50NEZ5

4WE6M61B/CW220-50N9DL4WEH10G20B/6AW220-50NEZ5L

4WE6M61B/CW220-50N9K44WEH10G20B/6AW220-50NTZ4

4WE6M61B/CW220-50N9Z5L4WEH10G20B/6AW220-50NTZ5

4WE6M61B/CW220-50NDKL4WEH10G20B/6AW220-50NTZ5L

4WE6M61B/CW220-50NDL4WEH10G20B/6AW220-50NZ5

4WE6M61B/CW220-50NK44WEH10G20B/6AW220-50NZ5L

4WE6P50B/AG24N       4WEH10G20B/6EW220-50NETZ4

4WE6P50B/AW220-50N4WEH10G20B/6EW220-50NETZ5

4WE6P50B/BG24N       4WEH10G20B/6EW220-50NETZ5L

4WE6P50B/BW220-50N4WEH10G20B/6EW220-50NEZ4

4WE6P61B/CG12N9DKL4WEH10G20B/6EW220-50NEZ5

4WE6P61B/CG12N9DL4WEH10G20B/6EW220-50NEZ5L

4WE6P61B/CG12N9K44WEH10G20B/6EW220-50NTZ4

4WE6P61B/CG12N9Z44WEH10G20B/6EW220-50NTZ5

4WE6P61B/CG12N9Z54WEH10G20B/6EW220-50NTZ5L

2.非直接作用式安全阀

这类安全阀可以分为先导式安全阀、带动力辅助装置的安全阀。

先导式安全阀是依靠从导阀排出的介质来驱动或控制的。而导阀本身是一个直接作用式安全阀，有时也采用其他形式的阀门。先导式安全阀适用于高压、大口径的场合。先导式安全阀的主阀还可以设计成依靠工作介质来密封的形式，或者可以对阀瓣施加比直接作用式安全阀大得多的机械载荷，具有良好的密封性能。它的动作很少受背压的影响。这种安全阀的缺点在于它的可靠性同主阀和导阀有关，动作不如直接作用式安全阀那样迅速、可靠，结构较复杂。

带动力辅助装置的安全阀是借助于一个动力辅助装置，在低于正常开启压力的情况下强制安全阀开启。这种安全阀适用于开启压力很接近于工作压力的场合，或需定期开启安全阀以进行检查或吹除粘着、冻结的介质的场合。也提供了一种在紧急情况下强制开启安全阀的手段。