SUN HYDRAULICS
RSFCQBV
$118.64 USD
- SUN HYDRAULICS
- Material:RSFCQBV
- Model:RSFC-QBV
- 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 RSFCQBV (RSFCQBV) 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 controls the pressure at port 1 relative to the drain port 3 and remains unaffected by back pressure at port 2 up to the valve setting. It can replace two-port relief valves in systems with return line pressure. The RSFCQBV is part of a series where all three-port sequence cartridges are interchangeable, maintaining consistent flow paths and cavity sizes. As the inlet pressure at port 1 rises above the valve setting, pilot flow increases, while a 150-micron stainless steel screen safeguards the main stage orifice. This model is not suitable for load-holding applications due to spool leakage and incorporates Sun's floating style construction to minimize internal binding risks. The valve's maximum operating pressure is 5000 psi (350 bar), with a capacity of 30 gpm (120 L/min). It features adjustable settings via W or Y controls, allowing full-range adjustment unless a special setting is specified as its maximum limit. Cartridges with EPDM seals are designed for phosphate ester fluids only, as exposure to petroleum-based substances can cause seal damage. The RSFCQBV has specific physical dimensions for installation: a hex size of 1-1/8 inches (28.6 mm) and an installation torque range of 45-50 lbf ft (61-68 Nm). Adjustment requires clockwise turns on an internal hex screw sized at 5/32 inches (4 mm), secured by a locknut with a torque specification of 80-90 lbf in (9-10 Nm). The seal kit for this cartridge uses Viton materials under part number 990202006, ensuring compatibility and reliability under specified conditions.
The Sun Hydraulics RSFCQBV (RSFCQBV) 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 controls the pressure at port 1 relative to the drain port 3 and remains unaffected by back pressure at port 2 up to the valve setting. It can replace two-port relief valves in systems with return line pressure. The RSFCQBV is part of a series where all three-port sequence cartridges are interchangeable, maintaining consistent flow paths and cavity sizes. As the inlet pressure at port 1 rises above the valve setting, pilot flow increases, while a 150-micron stainless steel screen safeguards the main stage orifice. This model is not suitable for load-holding applications due to spool leakage and incorporates Sun's floating style construction to minimize internal binding risks. The valve's maximum operating pressure is 5000 psi (350 bar), with a capacity of 30 gpm (120 L/min). It features adjustable settings via W or Y controls, allowing full-range adjustment unless a special setting is specified as its maximum limit. Cartridges with EPDM seals are designed for phosphate ester fluids only, as exposure to petroleum-based substances can cause seal damage. The RSFCQBV has specific physical dimensions for installation: a hex size of 1-1/8 inches (28.6 mm) and an installation torque range of 45-50 lbf ft (61-68 Nm). Adjustment requires clockwise turns on an internal hex screw sized at 5/32 inches (4 mm), secured by a locknut with a torque specification of 80-90 lbf in (9-10 Nm). The seal kit for this cartridge uses Viton materials under part number 990202006, ensuring compatibility and reliability under specified conditions.
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
- 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
- Sequence Valves Technical Tips
- Manufacturing Sun Cartridge Cavities
- Sequence Valves
- Sun Model Code Explanation; 999-901-334
- Cavity Information (S-171) and Tooling
- Cartridges: Materials of Construction
- Fluid and Temperature Recommendations
- Performance Data
- Sun's Floating Style Screw-In Cartridge
- Units of Measure, Settings, and Conversions
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.