SUN HYDRAULICS
SQDBFEN
$91.80 USD
- SUN HYDRAULICS
- Material:SQDBFEN
- Model:SQDB-FEN
- 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 SQDBFEN (SQDBFEN) is a kickdown sequence valve designed to provide an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the valve setting. This valve is ideal for applications where maintaining open flow is necessary as long as the pressure at port 1 surpasses that at port 2. It features a main stage orifice protected by a 150-micron stainless steel screen, ensuring durability and functionality in various conditions. The valve's pressure setting at port 1 is relative to the drain port 3, with a maximum allowable pressure of 5000 psi (350 bar). This model incorporates Sun's floating style construction, minimizing potential binding issues due to installation torque or machining variations. Specifically designed for use on the actuator side of hydraulic systems, this valve requires flow cessation from port 1 to port 2 for resetting. It should not be utilized in load-holding applications and must be reset by reducing pressure at port 1 below its set point while ensuring no flow occurs between ports. The cartridge's corrosion resistance can be enhanced with options like stainless steel or zinc-nickel plating, identifiable by specific model code suffixes. Installation specifications include a cavity type T-11A suitable for Series 1 cartridges, supporting a capacity of up to 15 gpm (60 L/min). Factory settings are established at the kickdown point with typical response times around 25 ms. With minimal leakage rates and adjustable settings via clockwise turns, this model ensures precise control within hydraulic systems. The cartridge weighs approximately .40 lb (0.20 kg), with specific torque requirements for installation and adjustment components provided for optimal performance and reliability.
The Sun Hydraulics SQDBFEN (SQDBFEN) is a kickdown sequence valve designed to provide an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the valve setting. This valve is ideal for applications where maintaining open flow is necessary as long as the pressure at port 1 surpasses that at port 2. It features a main stage orifice protected by a 150-micron stainless steel screen, ensuring durability and functionality in various conditions. The valve's pressure setting at port 1 is relative to the drain port 3, with a maximum allowable pressure of 5000 psi (350 bar). This model incorporates Sun's floating style construction, minimizing potential binding issues due to installation torque or machining variations. Specifically designed for use on the actuator side of hydraulic systems, this valve requires flow cessation from port 1 to port 2 for resetting. It should not be utilized in load-holding applications and must be reset by reducing pressure at port 1 below its set point while ensuring no flow occurs between ports. The cartridge's corrosion resistance can be enhanced with options like stainless steel or zinc-nickel plating, identifiable by specific model code suffixes. Installation specifications include a cavity type T-11A suitable for Series 1 cartridges, supporting a capacity of up to 15 gpm (60 L/min). Factory settings are established at the kickdown point with typical response times around 25 ms. With minimal leakage rates and adjustable settings via clockwise turns, this model ensures precise control within hydraulic systems. The cartridge weighs approximately .40 lb (0.20 kg), with specific torque requirements for installation and adjustment components provided for optimal performance and reliability.
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.
- 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-11A |
| Series | 1 |
| Capacity | 15 gpm60 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) | 2 in³/min.30 cc/min. |
| 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 | .40 lb0,20 kg |
| Seal kit - Cartridge | Viton: 990-011-006 |
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.
