Z2S-10 Check Valve
The isolator valve type Z2S is a releasable check valve in sandwich plate design. It is used for the leakage-free blocking of one or two actuator ports, also in case of longer standstill times.
Product Description
In direction A to A or B to B, there is a free flow; in the opposite direction, the flow is blocked If, for example, there is a flow through the valve in direction A to A, the control spool is moved in the direction of the B side, opens the ball seat valve and then pushes the poppet off its seat. Hydraulic fluid can now flow from B to B.
In order to allow the ball seat valve to be safely closed, the control spool must be hydraulically unloaded (see circuit example). Due to the pre-opening, there is a damped decompression of the pressurized liquid. Thus, possible switching shocks are avoided.
Pre-opening
▶ The two-stage set-up with an increased control open ratio means even low pilot pressure can be unloaded securely.
▶Avoidance of switching shocks due to dampened decompression of the pressure volume on the actuator side.
