Yale Valves and Pressure Switch
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- VSM safety-check valves. Prevent pressure drops when holding a raised load; VSM-11 screws into the cylinder, VSM-21 suits VHP directional valves.
- VHM throttle/shut-off valves. Shut off lines in multi-cylinder systems; the VHM-1-E needle valve also throttles the oil flow.
- VPR-1 pressure relief valve. Adjustable 0 - 700 bar with a max. oil flow of 10 l/min, returning excess oil to the reservoir.
- VPS-1 pressure switch. Adjustable from 100 to 800 bar, switching a 5 A/250 V alternating contact at the preset pressure.
- 700 bar programme. All valves have 3/8 NPT oil ports and fit the Yale 700 bar hydraulic cylinder and pump range.
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Yale Valves and Pressure Switch
VSM safety-check valves:
These safety-check valves are used for those applications where pressure drops (e.g. holding of a raised load) must be avoided. The VSM-11 is screwed directly into the oil port of a hydraulic cylinder and works there as a hose-break fuse; the VSM-21 is designed for combination with VHP directional valves.
VHM throttle-/shut-off valves:
These valves are used to shut off hydraulic lines, especially in multiple cylinder systems. The needle valve VHM-1-E also allows you to throttle an oil flow, especially within lifting applications; the VHM-2 is a ball valve.
VPR external pressure relief valves:
Pressure relief valves are used when the system pressure (force of the connected hydraulic cylinder) should not exceed a certain value. Once the set pressure is reached, the excess oil is guided back to the reservoir.
VPS pressure switch:
This precision adjustable pressure switch can be set to any pressure value between 100 and 800 bar. When the preset pressure value is reached, a micro-switch (alternating contact) is activated; if the pressure drops, it starts the pump again. For use with electrically operated directional control valves and pressure-guard power packs.
| Model | Type | Max. operating pressure (bar) | Oil ports | Weight (kg) |
|---|---|---|---|---|
| VSM-11 | Safety-check valve, screwed directly into the cylinder (hose-break fuse) | 700 | A 3/8-18 NPT outer / B 3/8-18 NPT inner | 0.9 |
| VSM-21 | Safety-check valve for combination with VHP directional valves | 700 | A 3/8-18 NPT inner / B 3/8-18 NPT outer | 1.0 |
| VHM-1-E | Throttle-/shut-off valve, needle control | 700 | 3/8-NPT inner, both ends | 0.7 |
| VHM-2 | Shut-off valve, ball control | 700 | 3/8-NPT inner, both ends | 0.9 |
| VPR-1 | External pressure relief valve, control range 0 - 700 bar, max. oil flow 10 l/min | 700 | P G 3/8 / T G 1/4 | 0.8 |
| VPS-1 | Pressure switch, control range 100 - 800 bar, 5 A/250 V | 800 | 3/8 NPT | 0.5 |