SUN HYDRAULICS
SQJBLBN

***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 SQJBLBN (SQJBLBN) is a specialized kickdown sequence valve designed to open completely and maintain an unrestricted flow path from port 1 to port 2 once the inlet pressure surpasses the valve's set threshold. This valve is engineered to remain open as long as the pressure at port 1 exceeds that at port 2, and it will reset only when the pressure at port 1 falls below the valve setting, flow ceases, and the pressure at port 2 equals or exceeds that of port 1. The SQJBLBN model features a main stage orifice protected by a robust 150-micron stainless steel screen, ensuring durability in demanding applications. It supports a maximum operating pressure of up to 5000 psi (350 bar) and offers a capacity of 120 gpm (480 L/min). With its Sun floating style construction, this model minimizes potential internal part binding due to excessive installation torque or machining variations. The valve is not recommended for load-holding applications but is ideal for use on the actuator side of hydraulic systems. Its design allows for physical and functional interchangeability with other three-port sequence cartridges within the same frame size. Additional specifications include an adjustment screw with an internal hex size of 5/32 in (4 mm) and a locknut torque specification between 80 - 90 lbf in (9 - 10 Nm). The SQJBLBN also incorporates factory pressure settings established at the kickdown point, with a typical response time of approximately 25 ms, making it suitable for precise hydraulic control applications.