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。
2
NIBCO swing check valves are available with an outside lever and weight. The lever and weight arrangement is used to maintain exterior control over disc movement.
尼伯科旋启式止回阀可配置外部操纵杆和压铁。操纵杆和压铁用于对阀瓣进行外部控制。
3
The directly connected blade adopts Lever-swing cutting type.