SUN HYDRAULICS
SQFBFDV
$143.96 USD
- SUN HYDRAULICS
- Material:SQFBFDV
- Model:SQFB-FDV
- 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 SQFBFDV (SQFBFDV) is a kickdown sequence valve designed to provide an open flow path from port 1 to port 2 once the inlet pressure exceeds the set threshold. This valve is ideal for applications where maintaining an open flow path is crucial after reaching a certain pressure, as it remains open until the pressure at port 1 drops below this setting. It features a three-port sequence cartridge, which is interchangeable in terms of flow path and cavity size for its frame size. The valve should not be used in load-holding applications and incorporates a stainless steel screen to protect the main stage orifice. With a maximum operating pressure of 5000 psi (350 bar) and a capacity of 30 gpm (120 L/min), it offers quick response times typically around 25 ms. The valve's design includes Sun\u2019s floating style construction to reduce internal binding risks due to installation torque or machining variations. The adjustment for increasing settings involves five clockwise turns, with specific torque requirements provided for installation and locknut adjustments. Additionally, the valve features Viton seals, ensuring durability and compatibility with hydraulic fluids.
The Sun Hydraulics SQFBFDV (SQFBFDV) is a kickdown sequence valve designed to provide an open flow path from port 1 to port 2 once the inlet pressure exceeds the set threshold. This valve is ideal for applications where maintaining an open flow path is crucial after reaching a certain pressure, as it remains open until the pressure at port 1 drops below this setting. It features a three-port sequence cartridge, which is interchangeable in terms of flow path and cavity size for its frame size. The valve should not be used in load-holding applications and incorporates a stainless steel screen to protect the main stage orifice. With a maximum operating pressure of 5000 psi (350 bar) and a capacity of 30 gpm (120 L/min), it offers quick response times typically around 25 ms. The valve's design includes Sun\u2019s floating style construction to reduce internal binding risks due to installation torque or machining variations. The adjustment for increasing settings involves five clockwise turns, with specific torque requirements provided for installation and locknut adjustments. Additionally, the valve features Viton seals, ensuring durability and compatibility with hydraulic fluids.
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.
- 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-2A |
| Series | 2 |
| Capacity | 30 gpm120 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) | 3 in³/min.50 cc/min. |
| Adjustment - Number of Clockwise Turns to Increase Setting | 55 |
| Valve Hex Size | 1 1/8 in.28,6 mm |
| Valve Installation Torque | 45 - 50 lbf ft61 - 68 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 | .50 lb0,25 kg |
| Seal kit - Cartridge | Viton: 990-202-006 |
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Additional Resources
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- 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.