Why PD pumps need safety valve at discharge side whereas a centrifugal pump doesn’t need it?
Because the positive displacement pumps create a higher discharge pressure. (Even up to 200bars ) In case by mistake the discharge valve is closed the higher delivery side pressure will damage the discharge line and the pump itself. To avoid we need a safety valve which may recycle a portion of liquid from delivery side to the reservoir.
Because the positive displacement pumps create a higher discharge pressure. (Even up to 200bars ) In case by mistake the discharge valve is closed the higher delivery side pressure will damage the discharge line and the pump itself. To avoid we need a safety valve which may recycle a portion of liquid from delivery side to the reservoir.
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