SUN HYDRAULICS
SQFBOBV

***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 SQFBOBV (SQFBOBV) is a kickdown sequence valve designed to open completely and remain open once the pressure at inlet port 1 surpasses the valve's set threshold, facilitating an unobstructed flow from port 1 to port 2. This mechanism is relative to the drain at port 3. The valve stays open as long as the pressure at port 1 remains higher than at port 2. To reset, the pressure at port 1 must drop below the set level, flow must stop between ports 1 and 2, and pressure at port 2 should equal or exceed that of port 1. The SQFBOBV is interchangeable with all three-port sequence cartridges of similar frame size, featuring identical flow paths and cavity dimensions. It should not be used in load-holding applications due to design constraints. The main stage orifice includes a protective stainless steel screen rated at 150 microns. Pressure at port 3 adds directly to the valve setting in a 1:1 ratio, with a maximum limit of 5000 psi (350 bar). This valve is intended for actuator-side use since flow cessation through it is necessary for resetting; if applied on the pump side, pump flow must halt for reset functionality. It incorporates Sun's floating style construction to reduce internal binding risks due to excessive installation torque or machining variations in cavities/cartridges. The SQFBOBV supports a capacity of up to 30 gpm (120 L/min) with factory pressure settings established at kickdown points and can operate under maximum pressures of up to 5000 psi (350 bar). Typical response time is around 25 ms, with minimal leakage rates specified under standard conditions.