SUN HYDRAULICS
SQFBFDN
$136.02 USD
- SUN HYDRAULICS
- Material:SQFBFDN
- Model:SQFB-FDN
- 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 SQFBFDN (Material Number: SQFBFDN) is a kickdown sequence valve designed to facilitate an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the valve setting. This model is suitable for use on the actuator side of hydraulic systems, as the flow must cease for the valve to reset. It features a pressure setting at port 1 relative to drain port 3 and requires that pressure at port 3 should not exceed 5000 psi (350 bar). The valve incorporates Sun's floating style construction to minimize internal binding due to installation torque or machining variations. With a capacity of 30 gpm (120 L/min) and a response time of approximately 25 ms, this valve is efficient and reliable in operation. The main stage orifice is protected by a durable 150-micron stainless steel screen, ensuring longevity and performance. The sequence cartridges are interchangeable across different frame sizes, providing versatility in application. However, it is not recommended for load-holding applications due to its design characteristics. The SQFBFDN model includes factory pressure settings established at the kickdown point and features a maximum operating pressure of 5000 psi (350 bar). Additionally, it has a maximum valve leakage rate of 3 in\u00b3/min (50 cc/min) at standard viscosity conditions. Installation requires specific torque settings with adjustment capabilities provided by an internal hex screw and locknut for secure operation.
The Sun Hydraulics SQFBFDN (Material Number: SQFBFDN) is a kickdown sequence valve designed to facilitate an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the valve setting. This model is suitable for use on the actuator side of hydraulic systems, as the flow must cease for the valve to reset. It features a pressure setting at port 1 relative to drain port 3 and requires that pressure at port 3 should not exceed 5000 psi (350 bar). The valve incorporates Sun's floating style construction to minimize internal binding due to installation torque or machining variations. With a capacity of 30 gpm (120 L/min) and a response time of approximately 25 ms, this valve is efficient and reliable in operation. The main stage orifice is protected by a durable 150-micron stainless steel screen, ensuring longevity and performance. The sequence cartridges are interchangeable across different frame sizes, providing versatility in application. However, it is not recommended for load-holding applications due to its design characteristics. The SQFBFDN model includes factory pressure settings established at the kickdown point and features a maximum operating pressure of 5000 psi (350 bar). Additionally, it has a maximum valve leakage rate of 3 in\u00b3/min (50 cc/min) at standard viscosity conditions. Installation requires specific torque settings with adjustment capabilities provided by an internal hex screw and locknut for secure operation.
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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- 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.