Eaton Vickers 1UL60P10S
Relief / Unloading Valve
Eaton leads the industry in screw-in cartridge valve (SiCV) technology with a wide selection of hydraulic valves for both stationary and mobile equipment. This product line includes pressure, flow, proportional and logic element screw-in cartridge valves and hydraulic integrated circuits.
These unloader valves are used to unload a pump, or pumps, to tank when pressure in a separate part of the circuit reaches a pre-set level. The valves will close, causing the circuit to reload, when the pressure drops to approximately 85% of the unload pressure. The most common application is to maintain a pressure in an accumulator which may be used in an emergency to operate an essential hydraulic function. (Eg, a brake circuit). The 1PUL60 valve has a drain port to ensure correct valve function while allowing the bypassed oil to be used for a secondary circuit requirement.
Operation
Inlet pressure is seen on the nose of the valve and system pressure (downstream of the system check valve) operates on the system pilot port. When pressure rises to the valve setting, the relief section opens and the system pressure acts on the pilot piston to hold the valve in the open position. The ratio between the pilot piston diameter and the seat diameter to the relief valve pilot section ensures that the valve will be maintained in the fully open position until the system pressure drops to approximately 85% of the unload
pressure.
Features
Valves are available as cartridges for installation into special line bodies or into custom designed Hydraulic Integrated Circuits. (NOTE: Provision must be made for a system check valve and a pilot line to signal the system pressure). Valve assemblies can be supplied
complete in a line body for use in accumulator circuits. Bodied valves include a check valve and the required connection from the system to the valve pilot port.
Specifications
| Adjustment type |
Leakproof Screw
|
| Cavity |
A12088
|
| Factory set pressure |
70 Bar
|
| Flow rate |
60 L/Min
|
| Fluid Compatibility |
MIL-H-5606, SAE10, SAE20, etc
|
| Function |
Unloading Valve
|
| Housing |
No
|
| Installation type |
Screw-in Cartridge
|
| Leakage |
20-65 cc/min
|
| Working Pressure |
40-100 Bar
|
| Number of housing ports |
4
|
| Number of valve ports |
4
|
| Operating temperature |
-30 C to 90 C (-22 to 194 F)
|
| Operation |
Pilot operated
|
| Port Size |
None
|
| Port Type |
Cartridge only
|
| Pressure rating |
350 Bar
|
| Recommended filtration level |
18/16/13
|
| Seal Type |
Nitrile
|
| Special Features |
None
|
| Style |
Spool
|
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