DZ30-7-50B/200XM 北京华德顺序阀现货供应

DZ30-7-50B/200XM北京华德顺序阀现货供应顺序阀（Sequence valve）是指在具有二个以上分支回路的系统中，根据回路的压力等来控制执行元件动作顺序的阀。该阀还可作为卸荷阀和背压阀使用。

按工作原理和结构，顺序阀分直动式和先导式两类；按压力控制方式，

顺序阀有内控和外控之分。 在顺序阀中装有单向阀，能通过反向液流的复合阀称为单向顺序阀。一般说来，这种阀使用较多。

顺序阀的基本功能是控制多个执行元件的顺序动作，根据其功能的不同，

分别称为顺序阀、背压阀、卸荷阀和平衡阀。 顺序阀的性能与溢流阀基本相同，但由于功能的不同，对顺序阀还有其特殊的要求：

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