SUN HYDRAULICS
SCEBCWN

***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 SCEBCWN (SCEBCWN) is an atmospherically referenced, direct-acting sequence valve equipped with a reverse-flow check feature. This valve is designed to supply a secondary circuit with flow once the inlet port pressure exceeds the valve's preset threshold. It includes an integral check valve to facilitate reverse flow from port 2 back to port 1. The valve setting regulates the pressure at port 1 relative to atmospheric conditions. It is particularly suitable for load holding applications where a drain connection is not feasible; however, users should be aware of potential external leakage or moisture ingress into the spring chamber over time. The design incorporates Sun's floating style construction, which mitigates risks of internal binding due to installation torque or machining variations. Key specifications include a maximum operating pressure of 5000 psi (350 bar) and a flow capacity of up to 30 gpm (120 L/min). The factory pressure settings are established at 2 in/min (30 cc/min), with typical response times around 2 ms. Valve leakage at reseat is minimal, approximately 10 drops per minute (0.7 cc/min), and the check cracking pressure is set at 25 psi (1.7 bar). For adjustments, five clockwise turns increase the setting, and installation requires specific torque values: valve hex size is 1-1/8 in. (28.6 mm), with installation torque between 45-50 lbf ft (61-68 Nm). The adjustment screw has an internal hex size of 5/32 in. (4 mm), while the locknut hex size is 9/16 in. (15 mm) with a torque requirement of 80-90 lbf in. (9-10 Nm). The model weighs .60 lb (.30 kg) and utilizes Viton seal kits for cartridge maintenance, designated as part number 990203006.