Note: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.

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。

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And ensure the pump at work, no more than the allowed NPSH. 4, suction and discharge line should be a support.

并保证泵在工作时，不超过其允许汽蚀余量。4、吸入和排出管路应该有支架。

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Note: on pump discharge, the preferred check valves are an in - line spring loaded, swing design with lever and weight or lever and spring.

注意：在泵的排泄口处，首选的止回阀是管内弹簧负载，旋启式，配置杠杆和重量或杠杆和弹簧。

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