Under NFPA 20, Section 126.96.36.199:
The circulating relief valve shall actuate below the opening set point of the pressure relief valve to ensure cooling of the pump during churn operation.
NFPA 20 Handbook:
The pressure setting of the circulation relief valve should be well below the pressure relief valve setting but above the maximum suction pressure.
Based on this, how do I properly specify the circulation relief valve setting that is installed on the pressure relief valve discharge line if the pressure relief valve set point is 175 psi?
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