Cla-Val Pacific Models 210-27 and 610-27 Altitude Valves control the high water level in reservoirs with out the need for floats or other devices. They are non-throttling valves that remain fully open until the solenoid is activated or the shut-off point of the hydraulic pilot control is reached. The valves close at high water level and open for return flow when the pressure at the valve inlet is less than reservoir pressure.
