SUN HYDRAULICS
SQHBQDN

***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 SQHBQDN (SQHBQDN) is a kickdown sequence valve designed to provide an unrestricted flow path from port 1 to port 2 once the pressure at the inlet port exceeds the pre-set valve setting. This valve is suitable for applications where it remains open as long as the inlet pressure surpasses the outlet pressure, creating a seamless flow transition. It is important to note that this model should not be used in load-holding applications. The valve features a main stage orifice protected by a 150-micron stainless steel screen and can handle pressures up to 5000 psi (350 bar) at port 3, which directly adds to the valve setting. The SQHBQDN is intended for use on the actuator side of hydraulic systems, requiring cessation of flow for resetting. Its floating style construction minimizes internal binding risks due to installation torque or machining variations. The valve fits into a T-17A cavity and offers a maximum capacity of 60 gpm (240 L/min). Factory pressure settings are established at the kickdown point, with a typical response time of 25 milliseconds and minimal leakage at specified conditions. Adjustments are made via an internal hex screw with specific torque requirements for both installation and locknut adjustments. With its robust design and precise control capabilities, this sequence valve is ideal for ensuring efficient fluid management in complex hydraulic circuits.