SUN HYDRAULICS
SQDBQCN
$102.06 USD
- SUN HYDRAULICS
- Material:SQDBQCN
- Model:SQDB-QCN
- 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 SQDBQCN (SQDBQCN) is a kickdown sequence valve designed to provide an unrestricted flow path between ports 1 and 2 once the inlet pressure exceeds the valve setting. This valve is suitable for applications where complete opening and sustained open positions are required, as long as the pressure at port 1 remains higher than at port 2. It features a floating style construction to minimize internal binding due to installation torque or machining variations. The valve is physically and functionally interchangeable with other 3-port sequence cartridges of the same frame size, making it versatile for various configurations. The SQDBQCN model incorporates a stainless steel screen to protect the main stage orifice and is intended for use on the actuator side of hydraulic systems since flow cessation through the valve is necessary for resetting. It should not be used in load-holding applications. The valve's pressure setting can be adjusted by turning clockwise, with five turns available for increased settings, and it features a locknut for secure adjustments. With a capacity of 15 gpm (60 L/min) and maximum operating pressure of 5000 psi (350 bar), this model ensures efficient fluid control within specified parameters. It provides low leakage rates, with maximum leakage at 110 SUS being just 2 in\u00b3/min (30 cc/min). The installation requires specific torque values, ensuring secure placement without damage to components. Additionally, corrosion-resistant options are available by selecting models with external stainless steel or zinc-nickel plated components. This sequence valve offers reliable performance in demanding environments where precise fluid control is essential.
The Sun Hydraulics SQDBQCN (SQDBQCN) is a kickdown sequence valve designed to provide an unrestricted flow path between ports 1 and 2 once the inlet pressure exceeds the valve setting. This valve is suitable for applications where complete opening and sustained open positions are required, as long as the pressure at port 1 remains higher than at port 2. It features a floating style construction to minimize internal binding due to installation torque or machining variations. The valve is physically and functionally interchangeable with other 3-port sequence cartridges of the same frame size, making it versatile for various configurations. The SQDBQCN model incorporates a stainless steel screen to protect the main stage orifice and is intended for use on the actuator side of hydraulic systems since flow cessation through the valve is necessary for resetting. It should not be used in load-holding applications. The valve's pressure setting can be adjusted by turning clockwise, with five turns available for increased settings, and it features a locknut for secure adjustments. With a capacity of 15 gpm (60 L/min) and maximum operating pressure of 5000 psi (350 bar), this model ensures efficient fluid control within specified parameters. It provides low leakage rates, with maximum leakage at 110 SUS being just 2 in\u00b3/min (30 cc/min). The installation requires specific torque values, ensuring secure placement without damage to components. Additionally, corrosion-resistant options are available by selecting models with external stainless steel or zinc-nickel plated components. This sequence valve offers reliable performance in demanding environments where precise fluid control is essential.
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.