The General Pump RV2 is a Regulating Valve is a 3 way flow-through valve with pneumatically-operated pressure regulator with automatic unloading. It regulates operating pressure of the system by releasing excess volume through the by-pass. It limits pressure in the system to the adjusted value. Unloading eliminates high pressure in the pump. Adjusted pressure can be set ON or OFF by means of the double-acting pneumatic cylinder. Reduces pump start-up load and protects the system from over pressurizations. This model is suitable for automatic systems and remote control. It has an Operating gpm of 48 and a Max psi of 2,900. Its Port Sizes include: Inlet: 1-11 BSPP, Outlet: 3/4-11 BSPP, By-pass: 1-1/4-11 BSPP, and Inlet-Outlet Air Ports: 1/4-19 BSPP.