Rotary Vane Pump Inlet/Outlet NPTF (In.) 1/2 in Max Flow (GPH) 232 gph Min Flow Rate (GPH) 220 gph Relief Pressure Max (PSI) 260 psi Max Pressure (PSI) 260 psi Brass Body Material External Relief Not Required By-Pass No 3-Bolt Flange Mounting Max Temp (F) 158 Degrees F Stainless Steel Shaft GPH of Water @ 50 PSI 230 gph GPH of Water @ 200 PSI 221 gph GPH of Water @ 250 PSI 220 gph 232 gph GPH Compliance NSF