SUN HYDRAULICS
SQDBKQN
$109.01 USD
- SUN HYDRAULICS
- Material:SQDBKQN
- Model:SQDB-KQN
- 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 SQDBKQN (SQDBKQN) is a kickdown sequence valve designed to open completely and remain open once the inlet port 1 pressure surpasses the valve setting, facilitating an unrestricted flow from port 1 to port 2. This valve is particularly suitable for applications on the actuator side of hydraulic systems, where flow cessation is required for the valve to reset. It is not recommended for load-holding applications. The valve's main stage orifice features a 150-micron stainless steel screen for protection. Pressure at port 3 directly influences the valve setting at a 1:1 ratio, with a maximum allowable pressure of 5000 psi (350 bar). The SQDBKQN incorporates Sun's floating style construction, minimizing internal part binding due to installation torque or machining variations. It offers a typical response time of 25 milliseconds and can handle a maximum operating pressure of up to 5000 psi (350 bar). This cartridge valve supports up to 15 gpm (60 L/min) capacity and features interchangeable three-port sequence cartridges within its series. The model has corrosion-resistant options identified by suffixes AP or LH for external stainless steel or zinc-nickel plated components, respectively. The adjustment screw requires an internal hex size of 5/32 inches (4 mm), while the locknut has a hex size of 9/16 inches (15 mm), with specified torques for installation and adjustment. For optimal performance in corrosive environments, consider utilizing these corrosion-resistant configurations.
The Sun Hydraulics SQDBKQN (SQDBKQN) is a kickdown sequence valve designed to open completely and remain open once the inlet port 1 pressure surpasses the valve setting, facilitating an unrestricted flow from port 1 to port 2. This valve is particularly suitable for applications on the actuator side of hydraulic systems, where flow cessation is required for the valve to reset. It is not recommended for load-holding applications. The valve's main stage orifice features a 150-micron stainless steel screen for protection. Pressure at port 3 directly influences the valve setting at a 1:1 ratio, with a maximum allowable pressure of 5000 psi (350 bar). The SQDBKQN incorporates Sun's floating style construction, minimizing internal part binding due to installation torque or machining variations. It offers a typical response time of 25 milliseconds and can handle a maximum operating pressure of up to 5000 psi (350 bar). This cartridge valve supports up to 15 gpm (60 L/min) capacity and features interchangeable three-port sequence cartridges within its series. The model has corrosion-resistant options identified by suffixes AP or LH for external stainless steel or zinc-nickel plated components, respectively. The adjustment screw requires an internal hex size of 5/32 inches (4 mm), while the locknut has a hex size of 9/16 inches (15 mm), with specified torques for installation and adjustment. For optimal performance in corrosive environments, consider utilizing these corrosion-resistant configurations.
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.