溢流阀和管道都是液压系统的重要元件，而溢流阀、管道和定量泵组成的系统又是液压系统的基本回路。
The relief valve and the pipeline are both important components of the hydraulic system, and that system including of relief valve and pipeline and constant pump is the basic loop of it.
内装溢流阀控制泵的正常运行。
Install overflow valve inside to control the normal operation of pump.
对于高，低报警，溢流保护，泵控制，包括宽的压力和温度的要求，和卫生应用。
For high and low alarms, overfill protection, pump control, including wide pressure and temperature requirements, and hygienic applications.
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