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VSM - Safety Check Valves
700 bar
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These safety-check valves are used for those applications where pressure drops (e.g. holding of a lifted load) must be avoided.
Depending on the location in a hydraulic circuit, these valves can have different functions. The model
VSM-11 can be directly screwed into the oil port of a hydraulic cylinder and works at this locatin as a 'hose break fuse'.
The design of the VSM-21 is suitable for a combination with VHP directional valves.
At this location, the VSM-21 ensures that the pressure is held precisely and that pressure drops caused by operating the directional
valve are avoided.
Selection Advice
If the valve is to be screwed directly into a hydraulic cylinder, please order VSM-11.
If the valve is to be combined with the directional valve of a power pack,
please order VSM-21.
Operation
After closing the relief valve (hand wheel) the cylinder can be advanced via the bypass.
In direction to the cylinder, the valves always have free flow. The built in check valve ensures that a pressurised cylinder (e.g. a lifted load) is held precisely in stop position.
A smooth lowering speed can be adjusted by opening the throttle valve (hand wheel) in order to relieve
the pressure.
A safety pressure valve protects the cylinder from being overloaded by external loading.
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