Combination of Pump and Checkvalve Installation
The discharge of many pumps are equipped with check valves in order to prevent backflow when the pump is being shut down. The illustration shows a typical CRV® installation.
Without a CRV® , the oscillating check valve generates a pulsating back pressure on the pump which causes excessive vibration, headbox breakage, bearing wear and even shaft breakage.
Installation of a CRV® prevents check valve oscillation and largely reduces pump vibration problems. The CRV® 's installation may also result in a higher flow rate and improved pump efficiency. Many utility boiler feed pumps and cooling water pumps have CRV® s installed.
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