Operation: The VektorFlo® Unclamp Delay Valve operates as a normally open element in an hydraulic clamping system. Low pressure fluid flows freely through the valve to downstream devices. As pressure in the system builds, the mechanical pilot piston moves away from the check valve allowing it to close. Full system pressure is reached and flow in the system stops. If pressure leaks off in downstream devices, the check valve will re-open and replenish pressure. During unclamping, inlet pressures falls with main system pressure but downstream pressure is held constant by the check valve. At the low inlet pressure, spring force starts to move the mechanical pilot towards the check valve at a rate set by the flow control and oil viscosity. The mechanical pilot piston moves through its stroke and encounters the check valve. Spring force opens the check to release all downstream pressure to the power unit reservoir.
U.S. Patent No. 9,683,669
L7-0431-00
* Manifold mount o-rings included. Ships with all ports plugged.
** Maximum inlet pressure 10 MPa. Excess pressure voids warranty
*** Duration of time delay may vary depending on the viscosity of oil in the application. If longer delays are required (up to 20 sec), contact Vektek Customer Support for assistance.