SUN HYDRAULICS
RPECFDN
$56.39 USD
- SUN HYDRAULICS
- Material:RPECFDN
- Model:RPEC-FDN
- 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 RPECFDN (RPECFDN) is a pilot-operated, balanced-piston relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve opens to the tank port when the inlet pressure reaches the set level, effectively throttling flow to maintain the desired pressure. Known for its accuracy and low pressure rise versus flow, this valve operates smoothly and quietly with a moderate response time of approximately 10 milliseconds. It is built to handle a maximum operating pressure of 5000 psi (350 bar) and offers a capacity of 25 gpm (95 L/min). The RPECFDN model features a main stage orifice protected by a 150-micron stainless steel screen, ensuring durability and reliability in various applications. Notably, it is not suitable for load-holding applications due to spool leakage; however, it can be effectively used in cross-port relief circuits with considerations for spool leakage. The valve\u2019s back pressure on the tank port is directly additive to the valve setting at a 1:1 ratio. For systems utilizing phosphate ester fluids, cartridges configured with EPDM seals are available but should not be exposed to petroleum-based substances. The valve can be adjusted through its full range using W or Y controls unless specified otherwise for special settings. Corrosion-resistant options are available as identified by model code suffixes AP or LH, which denote external stainless steel components or zinc-nickel plating respectively. Installation requires specific torque settings: 30-35 lbf ft (41-47 Nm) for the valve installation and 80-90 lbf in (9-10 Nm) for the locknut. The Sun Hydraulics RPECFDN ensures reliable performance across various demanding environments while minimizing internal binding through its floating style construction design.
The Sun Hydraulics RPECFDN (RPECFDN) is a pilot-operated, balanced-piston relief cartridge designed for precise pressure regulation in hydraulic systems. This normally closed valve opens to the tank port when the inlet pressure reaches the set level, effectively throttling flow to maintain the desired pressure. Known for its accuracy and low pressure rise versus flow, this valve operates smoothly and quietly with a moderate response time of approximately 10 milliseconds. It is built to handle a maximum operating pressure of 5000 psi (350 bar) and offers a capacity of 25 gpm (95 L/min). The RPECFDN model features a main stage orifice protected by a 150-micron stainless steel screen, ensuring durability and reliability in various applications. Notably, it is not suitable for load-holding applications due to spool leakage; however, it can be effectively used in cross-port relief circuits with considerations for spool leakage. The valve\u2019s back pressure on the tank port is directly additive to the valve setting at a 1:1 ratio. For systems utilizing phosphate ester fluids, cartridges configured with EPDM seals are available but should not be exposed to petroleum-based substances. The valve can be adjusted through its full range using W or Y controls unless specified otherwise for special settings. Corrosion-resistant options are available as identified by model code suffixes AP or LH, which denote external stainless steel components or zinc-nickel plating respectively. Installation requires specific torque settings: 30-35 lbf ft (41-47 Nm) for the valve installation and 80-90 lbf in (9-10 Nm) for the locknut. The Sun Hydraulics RPECFDN ensures reliable performance across various demanding environments while minimizing internal binding through its floating style construction design.
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.