SUN HYDRAULICS
SCCBLWN

***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 SCCBLWN (SCCBLWN) is an atmospherically referenced, direct-acting sequence valve with a reverse flow check feature. This valve is designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve's setting. It includes an integral check valve that allows reverse flow from port 2 back to port 1. The pressure setting of this sequence valve controls the pressure at port 1 relative to the atmospheric vent, making it suitable for load holding applications. These valves are particularly useful in scenarios where creating a drain connection is not feasible. However, it\u2019s important to note that atmospherically referenced valves may experience external leakage or moisture ingress into the spring chamber over time, with approximately one drop (0.07 cc) of fluid passing into the vented spring chamber every 4000 cycles. The SCCBLWN model incorporates Sun's floating style construction to minimize internal binding due to excessive installation torque or machining variations in cavity/cartridge designs. It has a capacity of 15 gpm (60 L/min) and operates at a maximum pressure of 5000 psi (350 bar), with a typical response time of 2 ms. The maximum allowable leakage at reseat is 10 drops/min (0.7 cc/min), and it features a check cracking pressure of 40 psi (2.8 bar). The adjustment mechanism requires approximately five clockwise turns to increase the setting, and it includes specific installation and torque specifications for optimal performance. This model weighs approximately .30 lb (.15 kg) and uses Viton seal kits for its cartridge components.