SUN HYDRAULICS
SCEBKBN

***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 SCEBKBN (SCEBKBN) is an atmospherically referenced, direct-acting sequence valve with a reverse-flow check, designed to supply a secondary circuit with flow once the pressure at inlet port 1 exceeds the valve setting. Featuring an integral check valve, it allows reverse flow from port 2 to port 1. The pressure setting of this sequence valve manages the pressure at port 1 relative to atmospheric venting. It is particularly suitable for load-holding applications where a drain connection is not feasible, though users should note that atmospherically referenced valves may eventually leak externally or permit moisture ingress into the spring chamber. Over time, approximately one drop (0.07 cc) of fluid will enter the vented spring chamber every 4000 cycles. This model incorporates Sun's floating style construction, reducing the risk of internal parts binding due to excessive installation torque or machining variations in cavity/cartridge. The SCEBKBN operates within a T-5A cavity and has a series 2 capacity of 30 gpm (120 L/min), with factory pressure settings established at 2 in/min (30 cc/min). It can handle a maximum operating pressure of up to 5000 psi (350 bar) and features a typical response time of about 2 ms. Maximum valve leakage at reseat is limited to ten drops per minute (0.7 cc/min), and it has a check cracking pressure of 25 psi (1.7 bar). Adjustment for increasing settings requires about five clockwise turns, with specific dimensions for installation torque and adjustment tools provided for precise application. The model weighs .60 lb (.30 kg), and it uses Viton seal kits identified by cartridge number 990203006 for maintenance needs.