SUN HYDRAULICS
SQFBLEN
$138.00 USD
- SUN HYDRAULICS
- Material:SQFBLEN
- Model:SQFB-LEN
- 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 SQFBLEN (SQFBLEN) is a sophisticated kickdown sequence valve designed to optimize hydraulic systems by facilitating an unrestricted flow path from port 1 to port 2 once the inlet pressure surpasses the valve setting. This valve remains open as long as the pressure at port 1 exceeds that at port 2. It is crucial for applications that require a complete opening under specific pressure conditions but should not be utilized in load-holding scenarios. The sequence valve's design includes a 150-micron stainless steel screen protecting the main stage orifice, ensuring durability and reliability in demanding environments. The SQFBLEN model features Sun's floating style construction, reducing the potential for internal component binding due to installation torque or machining variations. With a maximum operating pressure of 5000 psi (350 bar), this valve is suitable for high-pressure applications. It offers a fast typical response time of 25 ms and minimal leakage, with a maximum valve leakage of only 3 in\u00b3/min (50 cc/min) at 110 SUS (24 cSt). Installation requires specific torque settings, with the valve hex size being 1-1/8 inches (28.6 mm) and installation torque between 45-50 lbf\u00b7ft (61-68 Nm). This model is ideal for use on the actuator side of hydraulic systems, where flow through the valve must cease for resetting purposes. If applied on the pump side, it necessitates pump flow shut-off to reset effectively. The SQFBLEN's adjustable features include five clockwise turns to increase settings, with an internal hex size adjustment screw of 5/32 inches (4 mm). Additionally, it incorporates a locknut hex size of 9/16 inches (15 mm), requiring a locknut torque of 80-90 lbf\u00b7in (9-10 Nm). Weighing just .50 lb (.25 kg), this compact yet robust component is complemented by an available Viton seal kit under cartridge number 990202006.
The Sun Hydraulics SQFBLEN (SQFBLEN) is a sophisticated kickdown sequence valve designed to optimize hydraulic systems by facilitating an unrestricted flow path from port 1 to port 2 once the inlet pressure surpasses the valve setting. This valve remains open as long as the pressure at port 1 exceeds that at port 2. It is crucial for applications that require a complete opening under specific pressure conditions but should not be utilized in load-holding scenarios. The sequence valve's design includes a 150-micron stainless steel screen protecting the main stage orifice, ensuring durability and reliability in demanding environments. The SQFBLEN model features Sun's floating style construction, reducing the potential for internal component binding due to installation torque or machining variations. With a maximum operating pressure of 5000 psi (350 bar), this valve is suitable for high-pressure applications. It offers a fast typical response time of 25 ms and minimal leakage, with a maximum valve leakage of only 3 in\u00b3/min (50 cc/min) at 110 SUS (24 cSt). Installation requires specific torque settings, with the valve hex size being 1-1/8 inches (28.6 mm) and installation torque between 45-50 lbf\u00b7ft (61-68 Nm). This model is ideal for use on the actuator side of hydraulic systems, where flow through the valve must cease for resetting purposes. If applied on the pump side, it necessitates pump flow shut-off to reset effectively. The SQFBLEN's adjustable features include five clockwise turns to increase settings, with an internal hex size adjustment screw of 5/32 inches (4 mm). Additionally, it incorporates a locknut hex size of 9/16 inches (15 mm), requiring a locknut torque of 80-90 lbf\u00b7in (9-10 Nm). Weighing just .50 lb (.25 kg), this compact yet robust component is complemented by an available Viton seal kit under cartridge number 990202006.
Kick-down sequence valves will kick completely open and remain open once the pressure at the inlet (port 1) exceeds the valve setting, creating an unrestricted flow path from port 1 to port 2 (sequence). The pressure setting at port 1 is relative to the drain (port 3). The valve remains open as long as the pressure at port 1 exceeds the pressure at port 2. To reset the valve, pressure at port 1 must fall below the setting of the valve, flow from port 1 to port 2 must cease, and pressure at port 2 must be equal to or greater than the pressure at port 1.
- All 3 port sequence cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size).
- Should not be used in load holding applications.
- 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).
- Intended for use on the actuator side of the system as flow through the valve must cease for the valve to reset. If used on the pump side of a system, pump flow must be shut off for the valve to reset.
- 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 | Kick down pointKick down point |
| Maximum Operating Pressure | 5000 psi350 bar |
| Response Time - Typical | 25 ms25 ms |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 3 in³/min.50 cc/min. |
| 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.