Caleffi 1" FNPT x Sweat Differential Pressure Bypass Valve

1" NPT Inlet x 1" Sweat Outlet Differential Pressure Bypass Valve The differential bypass valve is used in systems working with variable flow rates, for example in those making widespread use of thermostatic valves or 2-way motorised valves. It ensures a flow recirculation proportional to the number of valves being closed, while limiting the maximum differential pressure value generated by the pump. In chilled water systems with high head pumps, installation of the version with a setting range between 100 and 400 kPa is advisable. Specifications: Adjustable from 2 to 10 psi Brass body Max working pressure: 150 psi Working temp range: 32° - 230°F 3/4" flow up to 9 gpm 1" flow up to 40 gpm 1-1/4" flow up to 45 gpm Weight: 1.4 lbs Connection: 1" NPT Inlet x 1" Sweat Outlet