KSB Centrifugal Pump Lexicon –

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Lift check valve

The lift check valve is a valve which prevents the suction line from running empty, e. g. after the pump has been stopped. Priming the pump prior to a re-start is therefore no longer necessary.

Spring-loaded lift check valves can be installed in the piping in almost any mounting position. Compared with swing check valves their  head losses, are higher as the deflection of the flow is much more significant. Lift check valves are preferred when applications require smaller nominal diameters.

A special lift check valve design is the automatic recirculation or minimum flow valve. See Fig. 1 Lift check valve

  

  

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