SUN HYDRAULICS
SXCBKWN

***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 SXCBKWN (Material Number: SXCBKWN) is an atmospherically referenced, direct-acting sequence valve designed to supply a secondary circuit with flow once the inlet pressure at port 1 exceeds the valve setting. This sequence valve 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 over time, these valves may experience external leakage or moisture ingress into the spring chamber. The valve features Sun's floating style construction, minimizing potential binding of internal parts due to excessive installation torque or machining variations. With a cavity type T-13A and Series 1 capacity of 15 gpm (60 L/min), this model operates effectively under a maximum pressure of 5000 psi (350 bar). It demonstrates a typical response time of 2 ms and maintains maximum valve leakage at reseat to 10 drops/min (0.7 cc/min). The adjustment mechanism allows for an increase in setting with approximately four clockwise turns, while installation requires a torque of 30-35 lbf ft (41-47 Nm). The adjustment screw has an internal hex size of 5/32 in. (4 mm), and the locknut hex size is 9/16 in. (15 mm) with a locknut torque specification of 80-90 lbf in. (9-10 Nm). Weighing .30 lb (.15 kg), this model also includes a Viton seal kit under part number 990010006. Due to its design characteristics, the SXCBKWN is ideal for applications where sequencing is necessary, allowing flow directionality as long as port 1 remains above the set pressure threshold.