VSM Safety Check Valves
VSM Safety-Check Valves
700 bar
These safety-check valves are used for those applications where pressure drops must be avoided (e.g. holding of a lifted load). 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 location 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 operat- ing the directional valve are avoided.
Operation:
After closing the relief valve (hand wheel) the cylinder can be advanced via the by-pass. In direction to the cylinder the valves always have free flow. The built-in check valve ensures that a pressurized 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.
Safety- check valves, throttle - / shut off valve | ||||||||
Model | Pressure max bar | Design type | Oil port cylinder size A | Oil port pump side B | Width mm | Length mm | Height mm | Weight |
*VSM-11 **VSM-21 | 700 700 | Needle Needle | 3/8-18 NPT outer 3/8-18 NPT inner | 3/8-18 NPT inner 3/8-18 NPT outer | 6 6 | 75 75 | 25 25 | 0.9 1.0 |
Safety- check valves | ||||||||
Model | Pressure max bar | Design type | Oil port cylinder size A | Oil port pump side B | Width mm | Length mm | Height mm | Weight |
*VSM-11 **VSM-21 |
700 700 |
Needle Needle |
3/8-18 NPT outer 3/8-18 NPT inner |
3/8-18 NPT inner 3/8-18 NPT outer |
6 6 |
75 75 |
25 25 |
0.9 1.0 |
Model | VSM-11 | VSM-21 |
Length, mm | 75 | 75 |
Width, mm | 25 | 25 |
Height, mm | 100 | 100 |