If we have a vertical turbine electric and diesel pump and a vertical multistage jockey pump. Is it correct to install main relief valve on the main discharge header?
The only place permitted to install the main relief valv is between the pump and the pump discharge check valv as written at 4.19.33 NFPA 20.
SHOULD BE INSTALLED BETWEEN THE PUMP DISCHAGE AND THE CHECK VALVE OF THE DIESEL PIPING. IN VERTICAL PUMPS YOU ONLY NEED THE MAIN RELIEF VALVE FOR THE DIESEL ENGINE PER NFPA 20.
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