HWH – SHUTTLE VALVE – RAP7964

Description

HWH – SHUTTLE VALVE – RAP7964

SHUTTLE VALVE – PRESSURE/RETURN

The Shuttle Valve is only used in electrically controlled levelling systems with solenoid valve manifolds. Although the shuttle valve is not used in room extension manifolds, the operation of the rooms that are used with a combination of a levelling manifold and room manifold power unit may be affected by a shuttle valve failure. The HWH® pumps have two ports, a pressure port (fluid to the manifold) and a return port (fluid from the manifold back to the reservoir). The shuttle valve is used to block the return port from the levelling manifold. This allows the system to develop pressure so the levelling jacks can work properly. The shuttle valve also has to shift to allow fluid into the levelling manifold. Anytime the pump is running, the shuttle valve shifts. This allows fluid into the manifold and blocks the return port back to the pump. It takes approximately 800 psi of pressure to shift the shuttle valve. When the pump turns off, a spring arrangement in the shuttle valve shifts the shuttle valve back to the original position, pressure side blocked, and return side open.