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pump discharge safety valve.
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LittleInch
Petroleum
That is a common method, especially for PD pumps. Just make sure the velocity is reasonable and that if this happens for a long time you measure temperature.
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Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
georgeverghese
Chemical
For a recip / plunger pump, vaguely recall a thumb rule that the gap between max developed dp and dp gap from max op pressure to PSV setpoint should be at least 40%, in a well attenuated discharge line (probably triplex or more heads + pulsation dampener) to avoid accidental lifting of PSV due to pressure pulsations. And use a pilot op PSV or a bellows PSV to account for high dp in the PSV discharge line back to suction vessel.
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