Single acting flow control valve

The valves type WMK are single-acting throttle flow control valves for inline mounting, directly on the line P, connected to the accumulator or to the safety block. They are designed to control the fluid flow rate in the fluid direction going out from the accumulator and allow a free flow rate in the opposite direction.
When there is a flow in throttle direction, fluid reaches the rear side of the poppet of the check valve which is pushed onto its seat in the housing by the spring. The fluid flows to the variable orifice through the side bores in the poppet. Throttling takes place between the housing and adjustable sleeves. With flow in the opposite direction, the fluid acts on the face sur- face of the poppet. The poppet is lifted from its seat and the fluid flows freely throught the valve. Simultaneously, part of the fluid getting through the ring slot creates the desired effect as self-cleaning.