SUN HYDRAULICS
SQDBLQN
$95.11 USD
- SUN HYDRAULICS
- Material:SQDBLQN
- Model:SQDB-LQN
- 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 SQDBLQN (Material Number: SQDBLQN) is a kickdown sequence valve designed to provide an unrestricted flow path once the pressure at the inlet port exceeds the valve setting. This model is specifically engineered for applications where pressure management and flow control are crucial, such as hydraulic systems requiring sequence operations. The valve activates when the inlet pressure surpasses the preset threshold, allowing fluid to flow freely from port 1 to port 2, while maintaining an open state as long as the inlet pressure remains higher than at port 2. To reset, the system must ensure that the pressure at port 1 falls below its setting and that there is no flow between ports 1 and 2. This valve features compatibility across all three-port sequence cartridges, ensuring functional interchangeability with consistent flow paths and cavity sizes. It includes a protective stainless steel screen for its main stage orifice and can handle pressures up to 5000 psi (350 bar). Notably, it should not be used in load-holding applications due to its design requirements for resetting. The SQDBLQN is corrosion-resistant with options for external stainless steel or zinc-nickel plating components, making it suitable for harsh environments. Incorporating Sun's floating style construction minimizes potential binding of internal parts due to installation torque variations or machining discrepancies. With a capacity of 15 gpm (60 L/min) and a typical response time of 25 ms, this valve ensures efficient performance in demanding settings. It requires specific torques for installation and adjustment, with detailed specifications provided for optimal setup. This product also comes with a Viton seal kit option, enhancing its versatility in various operational conditions.
The Sun Hydraulics SQDBLQN (Material Number: SQDBLQN) is a kickdown sequence valve designed to provide an unrestricted flow path once the pressure at the inlet port exceeds the valve setting. This model is specifically engineered for applications where pressure management and flow control are crucial, such as hydraulic systems requiring sequence operations. The valve activates when the inlet pressure surpasses the preset threshold, allowing fluid to flow freely from port 1 to port 2, while maintaining an open state as long as the inlet pressure remains higher than at port 2. To reset, the system must ensure that the pressure at port 1 falls below its setting and that there is no flow between ports 1 and 2. This valve features compatibility across all three-port sequence cartridges, ensuring functional interchangeability with consistent flow paths and cavity sizes. It includes a protective stainless steel screen for its main stage orifice and can handle pressures up to 5000 psi (350 bar). Notably, it should not be used in load-holding applications due to its design requirements for resetting. The SQDBLQN is corrosion-resistant with options for external stainless steel or zinc-nickel plating components, making it suitable for harsh environments. Incorporating Sun's floating style construction minimizes potential binding of internal parts due to installation torque variations or machining discrepancies. With a capacity of 15 gpm (60 L/min) and a typical response time of 25 ms, this valve ensures efficient performance in demanding settings. It requires specific torques for installation and adjustment, with detailed specifications provided for optimal setup. This product also comes with a Viton seal kit option, enhancing its versatility in various operational conditions.
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 |
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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.