SUN HYDRAULICS
SQFBKWV

***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 SQFBKWV (SQFBKWV) is a precision-engineered kickdown sequence valve designed to facilitate efficient hydraulic flow control. This valve kicks completely open and maintains an unrestricted flow path from port 1 to port 2 once the pressure at inlet port 1 surpasses the preset valve setting, which is relative to the drain port 3. It remains open as long as the pressure at port 1 exceeds that at port 2. For resetting, the pressure at port 1 must drop below the valve setting, ceasing flow from port 1 to port 2, with pressure at port 2 equaling or exceeding that of port 1. Notably, this valve should not be utilized in load-holding applications. The SQFBKWV model is interchangeable with other three-port sequence cartridges of similar frame size, offering consistent flow paths and cavity designs. It features a main stage orifice protected by a durable 150-micron stainless steel screen and can handle pressures up to a maximum operating threshold of 5000 psi (350 bar). The response time for this model is typically around 25 milliseconds, with a maximum leakage rate of approximately 3 in\u00b3/min (50 cc/min) under specified conditions. Installation specifications include a valve hex size of 1-1/8 inches (28.6 mm), installation torque between 45-50 lbf-ft (61-68 Nm), and an adjustment screw internal hex size of 5/32 inches (4 mm). The locknut hex size is set at 9/16 inches (15 mm), requiring a torque range of approximately 80-90 lbf-in (9-10 Nm). Weighing in at just .50 lbs (.25 kg), this cartridge incorporates Sun's floating style construction to minimize internal part binding due to excessive installation torque or machining variations. The SQFBKWV is ideally suited for use on the actuator side of hydraulic systems where uninterrupted flow cessation allows for reset functionality.