SUN HYDRAULICS
SQFBCNV

***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 SQFBCNV (SQFBCNV) is a kickdown sequence valve designed to operate efficiently in hydraulic systems by opening completely and maintaining an open state once the pressure at inlet port 1 surpasses the valve's set threshold. This mechanism creates an unrestricted flow path from port 1 to port 2, with the pressure at port 1 being relative to the drain at port 3. The valve remains open as long as the pressure at port 1 is higher than that at port 2. To reset, the pressure must drop below the set point, and flow between ports must cease with equal or greater pressure at port 2 compared to port 1. Notably, all three-port sequence cartridges are interchangeable in terms of flow path and cavity size for a given frame size but are not suitable for load-holding applications. The main stage orifice is shielded by a robust 150-micron stainless steel screen. The maximum allowable pressure at port 3 is additive to the valve setting and should not exceed 5000 psi (350 bar). This product is ideally used on the actuator side of systems since flow cessation through the valve is necessary for resetting; if used on the pump side, pump flow must be halted for resetting. The design incorporates Sun's floating-style construction to reduce internal binding risks due to installation torque or machining variations. The SQFBCNV features a capacity of up to 30 gpm (120 L/min) with factory-set kickdown points and operates effectively up to a maximum pressure of 5000 psi (350 bar). It has a typical response time of around 25 ms and minimal leakage rates. Adjustments can be made via an internal hex screw, allowing up to five clockwise turns for increased settings. The model weighs approximately .50 lb (.25 kg), with specific torque requirements provided for secure installation.