HAWE North America Inc. Check Valve, Hydraulic Release DRH 4

The check valves with hydraulic release type RH and DRH are used for blocking one or two consumer lines, as hydraulically actuated drain valves, or idle circulation valves. The valves may be optionally equipped with a pre-release, for one or both connection sides, to prevent decompression surges in the event of high pressure and high consumer flows. The type DRH has many variations and options such as in-line design, manifold mounting design, shock valves, pressure limiting valves to prevent slow pressure rises, and a leakage port to prevent unintended opening of the valve due to pressure rises, caused be leaking spool valves.