SUN HYDRAULICS
SQDBQBN
$99.08 USD
- SUN HYDRAULICS
- Material:SQDBQBN
- Model:SQDB-QBN
- 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 SQDBQBN (Material Number: SQDBQBN) is a kickdown sequence valve designed to kick completely open and maintain an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the valve setting. This valve remains open as long as the pressure at port 1 is greater than at port 2, resetting only when specific conditions are met: the pressure at port 1 must fall below the set value, flow from port 1 to port 2 must stop, and pressure at port 2 must equal or exceed that of port 1. The SQDBQBN features a corrosion-resistant construction, with options for external stainless steel or zinc-nickel plating. It incorporates Sun's floating style construction to reduce internal part binding due to installation torque or machining variations. This sequence valve is not suited for load holding applications and is intended for use on the actuator side of hydraulic systems. It includes a main stage orifice shielded by a 150-micron stainless steel screen and can handle pressures up to 5000 psi (350 bar). The valve exhibits minimal leakage, with a maximum of 2 in\u00b3/min at a viscosity of 110 SUS (24 cSt). It has a response time of approximately 25 milliseconds and can be adjusted using five clockwise turns to increase the setting. The installation requires specific torque values: the valve hex size is .78 inches (22.2 mm) with an installation torque range of 30-35 lbf\u00b7ft (41-47 Nm), while the locknut requires an additional torque of 80-90 lbf\u00b7in (9-10 Nm). The model weighs .40 lbs (.20 kg) and utilizes Viton seals with seal kit number 990011006.
The Sun Hydraulics SQDBQBN (Material Number: SQDBQBN) is a kickdown sequence valve designed to kick completely open and maintain an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the valve setting. This valve remains open as long as the pressure at port 1 is greater than at port 2, resetting only when specific conditions are met: the pressure at port 1 must fall below the set value, flow from port 1 to port 2 must stop, and pressure at port 2 must equal or exceed that of port 1. The SQDBQBN features a corrosion-resistant construction, with options for external stainless steel or zinc-nickel plating. It incorporates Sun's floating style construction to reduce internal part binding due to installation torque or machining variations. This sequence valve is not suited for load holding applications and is intended for use on the actuator side of hydraulic systems. It includes a main stage orifice shielded by a 150-micron stainless steel screen and can handle pressures up to 5000 psi (350 bar). The valve exhibits minimal leakage, with a maximum of 2 in\u00b3/min at a viscosity of 110 SUS (24 cSt). It has a response time of approximately 25 milliseconds and can be adjusted using five clockwise turns to increase the setting. The installation requires specific torque values: the valve hex size is .78 inches (22.2 mm) with an installation torque range of 30-35 lbf\u00b7ft (41-47 Nm), while the locknut requires an additional torque of 80-90 lbf\u00b7in (9-10 Nm). The model weighs .40 lbs (.20 kg) and utilizes Viton seals with seal kit number 990011006.
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.