SUN HYDRAULICS
RPECCKN
$66.32 USD
- SUN HYDRAULICS
- Material:RPECCKN
- Model:RPEC-CKN
- Summary:Cartridge
Quantity in stock: 0
***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 RPECCKN (Material Number: RPECCKN) is a pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This valve remains normally closed until the inlet pressure at port 1 reaches the predetermined setting, at which point it opens to tank port 2, allowing flow to modulate and maintain the desired pressure level. Known for its accuracy and smooth operation, this cartridge offers a low-pressure rise versus flow and operates quietly with moderate speed. It is functionally interchangeable with other 2-port relief cartridges of the same frame size, sharing a common flow path and cavity. The RPECCKN model can handle maximum pressure at port 2, making it suitable for cross-port relief circuits; however, spool leakage should be considered in such applications. The main stage orifice is protected by a stainless steel screen with 150-micron filtration capability. Notably, this valve is not recommended for load-holding applications due to potential spool leakage. Back pressure on tank port 2 affects the valve setting directly at a 1:1 ratio. This cartridge can be configured with EPDM seals for compatibility with phosphate ester fluids but should not be exposed to petroleum-based substances as they may cause damage. Corrosion-resistant options are available, identified by model code suffixes AP or LH for external stainless steel or zinc-nickel plated components respectively. The Sun floating style construction minimizes risks of internal binding from excessive torque or machining variations. With a capacity of 25 gpm (95 L/min) and maximum operating pressure of 5000 psi (350 bar), this valve features an adjustment range controlled by clockwise turns and comes equipped with specific installation torques and hex sizes for adjustments and locknuts. It includes a Viton seal kit (990010006) for maintenance needs.
The Sun Hydraulics RPECCKN (Material Number: RPECCKN) is a pilot-operated, balanced piston relief cartridge designed for precise pressure regulation in hydraulic systems. This valve remains normally closed until the inlet pressure at port 1 reaches the predetermined setting, at which point it opens to tank port 2, allowing flow to modulate and maintain the desired pressure level. Known for its accuracy and smooth operation, this cartridge offers a low-pressure rise versus flow and operates quietly with moderate speed. It is functionally interchangeable with other 2-port relief cartridges of the same frame size, sharing a common flow path and cavity. The RPECCKN model can handle maximum pressure at port 2, making it suitable for cross-port relief circuits; however, spool leakage should be considered in such applications. The main stage orifice is protected by a stainless steel screen with 150-micron filtration capability. Notably, this valve is not recommended for load-holding applications due to potential spool leakage. Back pressure on tank port 2 affects the valve setting directly at a 1:1 ratio. This cartridge can be configured with EPDM seals for compatibility with phosphate ester fluids but should not be exposed to petroleum-based substances as they may cause damage. Corrosion-resistant options are available, identified by model code suffixes AP or LH for external stainless steel or zinc-nickel plated components respectively. The Sun floating style construction minimizes risks of internal binding from excessive torque or machining variations. With a capacity of 25 gpm (95 L/min) and maximum operating pressure of 5000 psi (350 bar), this valve features an adjustment range controlled by clockwise turns and comes equipped with specific installation torques and hex sizes for adjustments and locknuts. It includes a Viton seal kit (990010006) 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.
- Main stage orifice is protected by a 150 micron stainless steel screen.
- 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.
- 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.
- 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.
- Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of Construction page located under TECH RESOURCES.
- 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-10A |
| Series | 1 |
| Capacity | 25 gpm95 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 | 7/8 in.22,2 mm |
| Valve Installation Torque | 30 - 35 lbf ft41 - 47 Nm |
| Adjustment Screw Internal Hex Size | 5/32 in.4 mm |
| Locknut Hex Size | 9/16 in.15 mm |
| Locknut Torque | 80 - 90 lbf in.9 - 10 Nm |
| Model Weight | .30 lb0,15 kg |
| Seal kit - Cartridge | Viton: 990-010-006 |
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Additional Resources
- CE/TÜV Certified Pressure Relief Valves
- Pressure Relief and Regulating Cartridge Valve Technical Tips
- Pilot Operated, Balanced Poppet Relief Valves
- Sun Expands Corrosion-Resistant Solutions
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- Sun Cartridges with EPDM Seals
- Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses
- Pilot-Operated, Balanced Poppet, Anti Shock Reliefs
- CavitySaver multi-function valves deliver single-cartridge solutions
- 'Soft' Relief Eliminates Pressure Spikes
- Tri-Grip Handknob Now Offered From Sun as a Standard Control Option
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Sun Introduces 'Hybrid' Valves
- Manufacturing Sun Cartridge Cavities
- Pressure Relief and Regulating Valves
- Sun Model Code Explanation; 999-901-334
- Cartridges: Materials of Construction
- Fluid and Temperature Recommendations
- Performance Data
- Sun's Floating Style Screw-In Cartridge
- Units of Measure, Settings, and Conversions
- Cavity Information (S-171) and Tooling
Notes:
- For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.