一种典型的应用是，把阀门安装在系统水泵附近的旁通管路中。
A typical application is that mount the valve nearby the by-pass pipes of the pump of the system.
将泵和阀组合成一体，并通过泵的旁通控制，使回路压力降至最低，从而减少管路及其泄漏。
Combine a body the pump and the valve, and through pump's by-pass governing, causes the return route pressure to drop to lowly, thus reduces the pipeline and divulging.
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