SUN HYDRAULICS
SQDBLWN
$93.80 USD
Tags:
- SUN HYDRAULICS
- Material:SQDBLWN
- Model:SQDB-LWN
- 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 SQDBLWN (SQDBLWN) is a kickdown sequence valve designed to provide an unrestricted flow path from port 1 to port 2 once the inlet pressure surpasses the preset threshold. This valve remains open as long as the pressure at port 1 exceeds that at port 2, and it requires a reset condition where the flow from port 1 to port 2 ceases, and the pressure at port 2 equals or exceeds that of port 1. Notably, this valve should not be used in load-holding applications. It features a main stage orifice protected by a 150-micron stainless steel screen and has a maximum operating pressure of 5000 psi (350 bar). The physical design allows for interchangeability among all three-port sequence cartridges, ensuring consistent flow paths and cavity compatibility for specific frame sizes. The valve's construction includes corrosion-resistant options identified by model code suffixes AP or LH for external stainless steel or zinc-nickel plated components, respectively. The floating style construction helps prevent internal binding due to excessive torque or machining variations. With a capacity of up to 15 gpm (60 L/min) and typical response time of 25 ms, this component is intended for use on the actuator side of hydraulic systems. Additionally, adjustments can be made with up to five clockwise turns to increase settings, with specific torque requirements for installation and adjustment components.
The Sun Hydraulics SQDBLWN (SQDBLWN) is a kickdown sequence valve designed to provide an unrestricted flow path from port 1 to port 2 once the inlet pressure surpasses the preset threshold. This valve remains open as long as the pressure at port 1 exceeds that at port 2, and it requires a reset condition where the flow from port 1 to port 2 ceases, and the pressure at port 2 equals or exceeds that of port 1. Notably, this valve should not be used in load-holding applications. It features a main stage orifice protected by a 150-micron stainless steel screen and has a maximum operating pressure of 5000 psi (350 bar). The physical design allows for interchangeability among all three-port sequence cartridges, ensuring consistent flow paths and cavity compatibility for specific frame sizes. The valve's construction includes corrosion-resistant options identified by model code suffixes AP or LH for external stainless steel or zinc-nickel plated components, respectively. The floating style construction helps prevent internal binding due to excessive torque or machining variations. With a capacity of up to 15 gpm (60 L/min) and typical response time of 25 ms, this component is intended for use on the actuator side of hydraulic systems. Additionally, adjustments can be made with up to five clockwise turns to increase settings, with specific torque requirements for installation and adjustment components.
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.