SUN HYDRAULICS
RSFCFQN
$104.74 USD
- SUN HYDRAULICS
- Material:RSFCFQN
- Model:RSFC-FQN
- 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 RSFCFQN (RSFCFQN) 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. It effectively manages pressure at port 1 relative to the drain port 3 and remains insensitive to back pressure at port 2 up to the valve setting, making it suitable for regulating pressure in place of two-port relief valves when there is pressure in the return line. Featuring interchangeable three-port sequence cartridges, this model ensures compatibility within its frame size. The main stage orifice is protected by a 150-micron stainless steel screen, with a maximum operating pressure of 5000 psi (350 bar). Although not suitable for load holding applications due to spool leakage, it offers adjustable settings through W or Y controls. Cartridges with EPDM seals are specifically for systems using phosphate ester fluids. The floating style construction minimizes internal part binding from installation torque or machining variations. It has a capacity of 30 gpm (120 L/min) and an established factory pressure setting at 4 gpm (15 L/min). Control pilot flow ranges from 10 to 15 in\u00b3/min (0.16 to 0.25 L/min), with typical response times of around 10 ms. Maximum valve leakage at 110 SUS (24 cSt) is rated at 3 in\u00b3/min (50 cc/min) under conditions of up to 1000 psi (70 bar). Installation requires a torque between 45 and 50 lbf ft (61 to 68 Nm), while adjustments are made using an internal hex screw size of 5/32 in. (4 mm) and secured with a locknut requiring torque between 80 and 90 lbf in. (9 to 10 Nm). The model weighs approximately .50 lb (.25 kg).
The Sun Hydraulics RSFCFQN (RSFCFQN) 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. It effectively manages pressure at port 1 relative to the drain port 3 and remains insensitive to back pressure at port 2 up to the valve setting, making it suitable for regulating pressure in place of two-port relief valves when there is pressure in the return line. Featuring interchangeable three-port sequence cartridges, this model ensures compatibility within its frame size. The main stage orifice is protected by a 150-micron stainless steel screen, with a maximum operating pressure of 5000 psi (350 bar). Although not suitable for load holding applications due to spool leakage, it offers adjustable settings through W or Y controls. Cartridges with EPDM seals are specifically for systems using phosphate ester fluids. The floating style construction minimizes internal part binding from installation torque or machining variations. It has a capacity of 30 gpm (120 L/min) and an established factory pressure setting at 4 gpm (15 L/min). Control pilot flow ranges from 10 to 15 in\u00b3/min (0.16 to 0.25 L/min), with typical response times of around 10 ms. Maximum valve leakage at 110 SUS (24 cSt) is rated at 3 in\u00b3/min (50 cc/min) under conditions of up to 1000 psi (70 bar). Installation requires a torque between 45 and 50 lbf ft (61 to 68 Nm), while adjustments are made using an internal hex screw size of 5/32 in. (4 mm) and secured with a locknut requiring torque between 80 and 90 lbf in. (9 to 10 Nm). The model weighs approximately .50 lb (.25 kg).
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.