弹簧负载 load on spring ; spring load
弹簧负载型安全压力阀 VCP
弹簧负载安全阀 spring load safety valve
弹簧负载风箱 spring-loaded bellows
控制供应管道的水压。在总成的上游安装一个软阀座，弹簧负载止回阀。
Control supply line water pressure. install a soft seated spring loaded check valve upstream of the assembly.
系列709采用模块设计概念，弹簧负载的保持有助于全过程的维护和组装。
Series 709 features a modular design concept which facilitates complete maintenance and assembly by retaining the spring load.
注意：在泵排泄口，首选的止回阀是管内弹簧负载，带杠杆和压铁或杠杆和弹簧的旋启式止回阀。
Note: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.
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