ETK Number: S-HYD-HSV-HAW-16455   Manufacturer: Hawe Hydraulics   Model: Line rupture safety valve type LB         Price: Request a Quote   Comment: The line rupture safety valves type LB are check valves. They are available as screw-in valves or with housing for in-line installation. The line rupture safety valves are best installed directly on the actuator(cylinder) which is to be safeguarded.   Description: When the flow through the valve increases above the pre-set limit, the flow forces will exceed the opposing spring force and the valve will block the flow immediately. The valve element in these valves is a shim.There are two different versions available. One valve design completely blocks the flow when actuated, whereas the other one allows a minimum flow (via an orifice) to slowly drop the load. Line rupture protection valves prevent an uncontrollable, accelerated movement of a loaded hydraulic actuator (drop) when the hydraulic back-pressure is lost as a result of rupture in the pressurized line or pipe connection. The line rupture protection valve must be screwed directly into or onto the pressurized oil inlet port of the hydraulic actuator to be safe-guarded. The type LB is a plate valve whose valve disc is raised off the valve seat by spring action in the neutral state, thereby maintaining an open flow-through cross section of variable width. The flow-through resistance and the back-pressure action at the valve disc in the flow-through direction B ® F (operation or actuating direction) generate a force which during normal operation does not exceed the spring counter force: The valve remains open. If the flow-through increases after rupture due to the driving load, the flow forces will exceed the spring force and the valve will close immediately.

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