SUN HYDRAULICS
SQFBLNV

***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 SQFBLNV (Material Number: SQFBLNV) is a 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 setting. This valve is engineered for use on the actuator side of hydraulic systems, where flow through the valve must cease for it to reset. It should not be used in load-holding applications. The main stage orifice is safeguarded by a 150-micron stainless steel screen, ensuring durability and performance reliability. The pressure at port 3 adds directly to the valve setting at a 1:1 ratio, with a maximum allowable pressure of 5000 psi (350 bar). Featuring Sun's floating style construction, this valve minimizes internal binding risks due to installation torque or machining variations. The SQFBLNV model offers a capacity of up to 30 gpm (120 L/min) with factory pressure settings established at the kickdown point. Its maximum operating pressure reaches up to 5000 psi (350 bar), with typical response times around 25 milliseconds. The valve exhibits minimal leakage, capped at 3 in\u00b3/min (50 cc/min) at 110 SUS (24 cSt). Installation requires specific torque values: valve hex size is 1-1/8 inches (28.6 mm), with an installation torque range of 45-50 lbf-ft (61-68 Nm). Adjustment screw internal hex size is set at 5/32 inches (4 mm), while locknut hex size is specified as 9/16 inches (15 mm) with a locknut torque range of 80-90 lbf-in (9-10 Nm). The model weighs approximately .50 lb (.25 kg) and uses Viton seal kits for enhanced performance and longevity under various conditions.