SUN HYDRAULICS
SQBBKWN

***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 SQBBKWN (SQBBKWN) is a kickdown sequence valve designed to provide an unrestricted flow path from port 1 to port 2 once the inlet pressure exceeds the valve's set threshold. This valve remains open as long as the pressure at port 1 surpasses that at port 2, and it resets when the pressure at port 1 falls below its set point, ceasing flow between ports. It is essential for applications on the actuator side of hydraulic systems, as flow must stop for reset; using it on the pump side requires pump flow cessation for reset. Notably, this valve should not be used in load-holding applications due to its design characteristics. The SQBBKWN features a maximum operating pressure of 5000 psi (350 bar) and a capacity of 7.5 gpm (30 L/min). Its response time is typically around 25 milliseconds, with minimal leakage under specified conditions. The valve incorporates Sun's floating style construction to reduce internal part binding risks due to excessive installation torque or machining variations. It offers ease of interchangeability with other three-port sequence cartridges within the same frame size. Additional specifications include a factory pressure setting at the kickdown point and an adjustment mechanism allowing up to five full clockwise turns to increase settings. The installation torque ranges from 20-25 lbf ft (27-33 Nm), with specific hex sizes provided for adjustment screw and locknut operations. The product weighs approximately .30 lb (.15 kg) and utilizes Viton seal kits for durability and performance consistency in various environments.