PPDB-OWN SUN Hydraulics Pilot-operated Pressure Reducing Relieving Valve
Pilot-operated, pressure reducing/relieving valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3).
- Full reverse flow from reduced pressure (port 1) to inlet (port 2) may cause the main spool to close. If reverse free flow is required in the circuit, consider adding a separate check valve to the circuit.
- If pilot flow consumption is critical, consider using direct acting reducing/relieving valves.
- Recommended maximum inlet pressure is determined by the adjustment range. Ranges D, E, N, and Q are tested with a 2000 psi (140 bar) maximum differential between inlet and reduced pressure. Ranges A, B, and H are tested with a 3000 psi (210 bar) maximum differential between inlet and reduced pressure. Ranges C and W are tested with 5000 psi (350 bar) of inlet pressure.
- Pilot operated valves exhibit exceptionally flat pressure/flow characteristics, are very stable and have low hysteresis.
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
- Pilot operated reducing, reducing/relieving valves by nature are not fast acting valves. For superior dynamic response, consider direct acting valves.
- W and Y controls (where applicable) can be specified with or without a special setting. When no special setting is specified, the valve is adjustable throughout its full range using the W or Y control. When a special setting is specified, this setting represents the maximum setting of the valve.
- Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
- All three-port pressure reducing and reducing/relieving cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size). When considering mounting configurations, it is sometimes recommended that a full capacity return line (port 3) be used with reducing/relieving cartridges.
- Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.
Other Models:
| CXBA-XCN |
CXDA-XCN |
CXFA-XCN |
CXHA-XCN |
| CXED-XCN |
CXCD-XCN |
CXAD-XCN |
CXJA-XCN |
| CXGD-XCN |
CNCC-XCN |
CXAE-XCN |
CXCE-XCN |
| CXEE-XCN |
CNAD-XCN |
RPCC-LAN |
RPEC-LAN |
| RPGC-LAN |
RPIC-LAN |
RPEE-LAN |
RPGE-LAN |
| RPIE-LAN |
RDDA-LAN |
RDBA-LAN |
RVCD-LAN |
| RDFA-LAN |
RDHA-LAN |
RBAC-LAN |
RBAA-LAN |
| PBBB-LAN |
PBDB-LAN |
PBFB-LAN |
PBHB-LAN |
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