What type of safety valve should be used for the return inlet of the pump outlet safety valve?
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The pump outlet safety valve returns to the inlet (or to the pressure storage tank in the case of pump and tank systems for LPG). Should a pilot-operated safety valve be used? It’s still ordinary. I think the back pressure in this case is very high, so a pilot-operated system is needed first
When installing a safety valve back to the inlet at the pump outlet, a pilot-operated safety valve is recommended in cases of high back pressure. Pilot-operated safety valves can balance the back pressure by guiding pressure, thereby enabling the safety valve to operate more stably. In contrast, conventional safety valves are likely to fail to reach the preset opening pressure under high backpressure; therefore, pilot-operated safety valves are more suitable for such situations. .