SUN HYDRAULICS
SCEBKDN

***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 SCEBKDN (SCEBKDN) is an atmospherically referenced, direct-acting sequence valve with a reverse-flow check. This valve is designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the set valve pressure. It features an integral check valve that allows for reverse flow from port 2 to port 1. The sequence valve's pressure setting controls the pressure at port 1 relative to atmospheric venting, making it suitable for load-holding applications where a drain connection is not feasible. However, users should be aware that atmospherically referenced valves may leak externally or allow moisture ingress over time, with approximately one drop (0.07 cc) of fluid entering the vented spring chamber every 4000 cycles. The valve incorporates Sun's floating style construction, which minimizes the risk of internal parts binding due to excessive installation torque or machining variations in cavity/cartridge setups. It fits into a T-5A cavity and has a capacity of 30 gpm (120 L/min). The factory pressure settings are established at 2 in/min (30 cc/min), with a maximum operating pressure of 5000 psi (350 bar). Typical response time is around 2 ms, and maximum valve leakage at reseat is limited to 10 drops/min (0.7 cc/min). The check cracking pressure is set at 25 psi (1.7 bar), and adjustments can be made by turning clockwise up to five times to increase the setting. Installation specifications include a valve hex size of 1-1/8 in. (28.6 mm) and 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 locknut torque range of 80 - 90 lbf-in (9 -10 Nm). The model weight is approximately .60 lb (.30 kg), and it includes seals compatible with Viton: part number 990203006.