Cla-Val - Hydraulic Pressure Control Valves - 50-90 & 650-90 Pressure Sustaining Valve ***
The 50 Series Pressure Relief Valve is designed to maintain constant upstream pressure within close limits. In operation, the valve is actuated by line pressure through a pilot control system, opening fast to maintain steady line pressure but closing gradually to prevent surges. In addition to surge relief, this valve can be used for pressure relief, pressure sustaining, back pressure or unloading functions in a by-pass system.
Cla-Val Models 50-90 and 650-90 Pressure Sustaining Valves are hydraulically operated, pilot-controlled, modulating valves designed to maintain constant upstream pressure within close limits. These valves can be used for pressure relief, pressure sustaining, back pressure, or unloading functions in a by-pass system. In a typical application, 50-90 and 650-90 valves are installed between an upper zone and a lower area of heavy demand. The valves act to maintain desired upstream pressure to prevent “robbing” pressure from the upper zone while maintaining smooth control and positive pressure regulation.
