SUN HYDRAULICS
RSFCFDN
$104.74 USD
- SUN HYDRAULICS
- Material:RSFCFDN
- Model:RSFC-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 RSFCFDN (RSFCFDN) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the inlet port pressure exceeds the valve setting. This valve effectively controls pressure at port 1 relative to the drain port 3 and is insensitive to back pressure at port 2 up to the valve setting. It can replace 2-port relief valves if there is pressure in the return line. The RSFCFDN model features interchangeable 3-port sequence cartridges, maintaining consistent flow paths and cavity dimensions across similar frame sizes. Its main stage orifice is safeguarded by a 150-micron stainless steel screen, and it operates at a maximum pressure of 5000 psi (350 bar). The valve's design incorporates Sun's floating style construction, reducing internal part binding risks due to excessive installation torque or machining variations. This sequence valve is not suitable for load-holding applications due to spool leakage. It offers adjustable settings using W or Y controls, with options for special settings representing maximum values. EPDM seals are available for systems using phosphate ester fluids but are incompatible with petroleum-based substances. The RSFCFDN has a capacity of 30 gpm (120 L/min) and factory pressure settings determined at 4 gpm (15 L/min). Control pilot flow ranges from 10-15 in\u00b3/min (0.16-0.25 L/min), with a typical response time of 10 ms. Additional specifications include a maximum valve leakage rate of 3 in\u00b3/min at 110 SUS (24 cSt) under pressures of up to 1000 psi (70 bar), adjustment capabilities requiring approximately five clockwise turns to increase settings, and specific torque requirements for installation and locknut adjustments. The model weighs approximately .50 lb (0.25 kg) and uses Viton seal kits for cartridge maintenance.
The Sun Hydraulics RSFCFDN (RSFCFDN) is a pilot-operated, balanced piston sequence valve designed to supply a secondary circuit with flow once the inlet port pressure exceeds the valve setting. This valve effectively controls pressure at port 1 relative to the drain port 3 and is insensitive to back pressure at port 2 up to the valve setting. It can replace 2-port relief valves if there is pressure in the return line. The RSFCFDN model features interchangeable 3-port sequence cartridges, maintaining consistent flow paths and cavity dimensions across similar frame sizes. Its main stage orifice is safeguarded by a 150-micron stainless steel screen, and it operates at a maximum pressure of 5000 psi (350 bar). The valve's design incorporates Sun's floating style construction, reducing internal part binding risks due to excessive installation torque or machining variations. This sequence valve is not suitable for load-holding applications due to spool leakage. It offers adjustable settings using W or Y controls, with options for special settings representing maximum values. EPDM seals are available for systems using phosphate ester fluids but are incompatible with petroleum-based substances. The RSFCFDN has a capacity of 30 gpm (120 L/min) and factory pressure settings determined at 4 gpm (15 L/min). Control pilot flow ranges from 10-15 in\u00b3/min (0.16-0.25 L/min), with a typical response time of 10 ms. Additional specifications include a maximum valve leakage rate of 3 in\u00b3/min at 110 SUS (24 cSt) under pressures of up to 1000 psi (70 bar), adjustment capabilities requiring approximately five clockwise turns to increase settings, and specific torque requirements for installation and locknut adjustments. The model weighs approximately .50 lb (0.25 kg) and uses Viton seal kits for cartridge maintenance.
Pilot-operated, balanced piston sequence valves will supply a secondary circuit with flow once the pressure at the inlet (port 1) has exceeded the valve setting. The pressure setting of a sequence valve controls the pressure at port 1 relative to the pressure at the drain (port 3). These valves are insensitive to back pressure at port 2 (sequence), up to the valve setting. They may be used to regulate pressure in place of 2-port relief valves if there is pressure in the return line.
- All 3 port sequence cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size).
- Pilot flow continues to increase as the pressure at port 1 (inlet), relative to the pressure at port 3 (drain), rises above the valve setting.
- The main stage orifice is protected by a 150 micron stainless steel screen.
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
- Not suitable for use in load holding applications due to spool leakage.
- 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.
- 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-2A |
| Series | 2 |
| Capacity | 30 gpm120 L/min. |
| Factory Pressure Settings Established at | 4 gpm15 L/min. |
| Maximum Operating Pressure | 5000 psi350 bar |
| Control Pilot Flow | 10 - 15 in³/min.0,16 - 0,25 L/min. |
| Response Time - Typical | 10 ms10 ms |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 3 in³/min.@1000 psi50 cc/min.@70 bar |
| Adjustment - Number of Clockwise Turns to Increase Setting | 55 |
| Valve Hex Size | 1 1/8 in.28,6 mm |
| Valve Installation Torque | 45 - 50 lbf ft61 - 68 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 | .50 lb0,25 kg |
| Seal kit - Cartridge | Viton: 990-202-006 |
Show FAQ
Additional Resources
- Sequence Valves Technical Tips
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- Sun Cartridges with EPDM Seals
- Sun Expands Corrosion-Resistant Solutions
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses
- Manufacturing Sun Cartridge Cavities
- Sequence Valves
- Sun's Floating Style Screw-In Cartridge
- Units of Measure, Settings, and Conversions
- Sun Model Code Explanation; 999-901-334
- Cavity Information (S-171) and Tooling
- Cartridges: Materials of Construction
- Fluid and Temperature Recommendations
- Performance Data
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.