（ 3）防止因自重引起油缸活塞自由下落而做平衡阀用；
（4）用外控顺序阀做卸荷阀，使泵卸荷；
（5）用内控顺序阀作背压阀。
顺序阀根据装配结构的不同，可以实现不同的回路功能，如溢流阀、顺序阀和平衡阀的功能。

顺序阀
联系人：蔡韵
电话：02788169190
手机：18771022829
传真：02759109675
qq：3121226951/1287946729
qq邮箱：3121226951@qq.com

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