SUN HYDRAULICS
RELIEF
RPCCKQN
- SUN HYDRAULICS
- Material:RPCCKQN
- Model:RPCC-KQN
- Summary:Cartridge
Due to extremely high demand, please call 888-905-7411 for availability
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics RPCCKQN (RPCCKQN) is a pilot-operated, balanced-piston relief cartridge designed as a normally closed pressure regulating valve. It functions by opening to the tank port when the pressure at the inlet port reaches the set valve pressure, effectively throttling flow to maintain desired pressure levels. Known for its accuracy and smooth operation, this valve exhibits low pressure rise against flow and operates quietly with moderate speed. The RPCCKQN is interchangeable with other 2-port relief cartridges of similar frame size and flow path, making it versatile in various applications. It can handle maximum pressures at port 2 and is suitable for cross-port relief circuits, though users should account for spool leakage in such configurations. The valve's minimum setting is 75 psi (5 bar) across all spring ranges, but it is not recommended for load-holding applications due to potential spool leakage. Backpressure on the tank port directly adds to the valve setting at a 1:1 ratio. The main stage orifice is contamination-protected, and EPDM-sealed cartridges are intended for phosphate ester fluid systems only, as petroleum-based fluids can damage these seals. The floating style construction reduces internal part binding risks due to installation torque or machining variations. With a cavity size of T-162A and series 0 capacity of 12 gpm (45 L/min), the RPCCKQN has a maximum operating pressure of 5000 psi (350 bar) and typical response time of 10 ms. Valve leakage at specified conditions is minimal, and adjustments can be made via an internal hex screw with locknut provisions. This cartridge weighs approximately .20 lb (.10 kg) and comes with a Viton seal kit option available for maintenance needs.
The Sun Hydraulics RPCCKQN (RPCCKQN) is a pilot-operated, balanced-piston relief cartridge designed as a normally closed pressure regulating valve. It functions by opening to the tank port when the pressure at the inlet port reaches the set valve pressure, effectively throttling flow to maintain desired pressure levels. Known for its accuracy and smooth operation, this valve exhibits low pressure rise against flow and operates quietly with moderate speed. The RPCCKQN is interchangeable with other 2-port relief cartridges of similar frame size and flow path, making it versatile in various applications. It can handle maximum pressures at port 2 and is suitable for cross-port relief circuits, though users should account for spool leakage in such configurations. The valve's minimum setting is 75 psi (5 bar) across all spring ranges, but it is not recommended for load-holding applications due to potential spool leakage. Backpressure on the tank port directly adds to the valve setting at a 1:1 ratio. The main stage orifice is contamination-protected, and EPDM-sealed cartridges are intended for phosphate ester fluid systems only, as petroleum-based fluids can damage these seals. The floating style construction reduces internal part binding risks due to installation torque or machining variations. With a cavity size of T-162A and series 0 capacity of 12 gpm (45 L/min), the RPCCKQN has a maximum operating pressure of 5000 psi (350 bar) and typical response time of 10 ms. Valve leakage at specified conditions is minimal, and adjustments can be made via an internal hex screw with locknut provisions. This cartridge weighs approximately .20 lb (.10 kg) and comes with a Viton seal kit option available for maintenance needs.
Pilot-operated, balanced-piston relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast.
- All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size).
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.
- Minimum setting is 75 psi (5 bar) for all spring ranges.
- Not suitable for use in load holding applications due to spool leakage.
- Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
- The main stage orifice is protected against contamination.
- 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.
- 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.
| Cavity | T-162A |
| Series | 0 |
| Capacity | 12 gpm45 L/min. |
| Factory Pressure Settings Established at | 4 gpm15 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Response Time - Typical | 10 ms10 ms |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 2 in³/min.@1000 psi30 cc/min.@70 bar |
| Adjustment - Number of Clockwise Turns to Increase Setting | 55 |
| Valve Hex Size | 3/4 in.19,1 mm |
| Valve Installation Torque | 20 - 25 lbf ft27 - 33 Nm |
| Adjustment Screw Internal Hex Size | 5/32 in.4 mm |
| Locknut Hex Size | 1/2 in.12,7 mm |
| Locknut Torque | 80 - 90 lbf in.9 - 10 Nm |
| Model Weight | .20 lb0,10 kg |
| Seal kit - Cartridge | Viton: 990-162-006 |
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