SUN HYDRAULICS
SQFBLBN

***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 SQFBLBN (SQFBLBN) is a high-performance kickdown sequence valve designed to open fully and maintain an open state once the inlet port 1 pressure surpasses the preset valve threshold, ensuring an unrestricted flow from port 1 to port 2. This valve is engineered with a pressure setting at port 1 that is relative to the drain port 3, and it remains open as long as the pressure at port 1 exceeds that at port 2. The valve will reset only when the pressure at port 1 drops below its set value, flow from port 1 to port 2 stops, and pressure at port 2 matches or exceeds that of port 1. Notably, this valve should not be used in load-holding applications. It features a main stage orifice protected by a durable 150-micron stainless steel screen and can handle pressures up to a maximum of 5000 psi (350 bar) at port 3. The design incorporates Sun's floating style construction to minimize internal binding due to installation torque or machining variations. This sequence cartridge is interchangeable with others in its series, sharing the same flow path and cavity size for consistent performance across applications. With a capacity of up to 30 gpm (120 L/min), it offers quick response times typically around 25 ms and minimal leakage rates. Installation requires specific torque settings, with adjustment options available via an internal hex screw. The SQFBLBN model weighs approximately .50 lb (0.25 kg) and comes with Viton seal options for robust performance in hydraulic systems where actuator-side placement is crucial for proper reset function.