SUN HYDRAULICS
SQFBCWN

***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 SQFBCWN (SQFBCWN) is a specialized kickdown sequence valve designed to manage hydraulic flow effectively in various systems. This valve operates by kicking completely open and maintaining an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the set threshold. It remains open as long as the inlet pressure surpasses the outlet pressure, and resets only when specific conditions are met: the inlet pressure must drop below the set point, flow from port 1 to port 2 must stop, and outlet pressure must be at least equal to or greater than inlet pressure. The valve is engineered with a floating style construction that minimizes internal binding risks due to installation torque or machining variations. It features a main stage orifice protected by a 150-micron stainless steel screen and is intended for use on the actuator side of hydraulic systems, where flow cessation is necessary for resetting. The valve should not be used in load-holding applications, and its operational parameters include a maximum operating pressure of 5000 psi (350 bar), a typical response time of 25 ms, and minimal leakage rates under specified conditions. The design allows for interchangeability across all three-port sequence cartridges of similar frame sizes. Adjustments can be made using an internal hex screw, with specific torque requirements for secure installation. Additionally, pressures at drain port 3 directly influence valve settings at a 1:1 ratio but should not exceed specified limits.