SUN HYDRAULICS
SCCBLCN

***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 SCCBLCN (SCCBLCN) is an atmospherically referenced, direct-acting sequence valve with an integrated reverse-flow check. This valve is designed to activate a secondary circuit by allowing flow once the inlet port 1 pressure surpasses the pre-set valve threshold. It features a built-in check valve that facilitates reverse flow from port 2 to port 1. The pressure setting of this sequence valve manages the pressure at port 1 in relation to the atmospheric vent, making it suitable for load-holding applications where a drain connection is not feasible. However, users should be aware that these valves might leak externally or permit moisture ingress into the spring chamber over time. Approximately one drop (0.07 cc) of fluid may enter the vented spring chamber every 4000 cycles. The SCCBLCN model employs Sun's floating style construction to reduce the risk of internal part binding due to excessive installation torque or variations in cavity/cartridge machining. It fits into a T-13A cavity and has a series 1 capacity of up to 15 gpm (60 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). The typical response time is around 2 ms, and the maximum valve leakage at reseat is limited to 10 drops/min (0.7 cc/min). The check cracking pressure stands at 40 psi (2.8 bar), and adjustment requires approximately five clockwise turns to increase the setting. The valve has specific installation requirements: it uses a hex size of 7/8 in. (22.2 mm) with an installation torque range of 30 - 35 lbf ft (41 - 47 Nm). The adjustment screw has an internal hex size of 5/32 in. (4 mm), while the locknut hex size is set at 9/16 in. (15 mm) with a locknut torque between 80 - 90 lbf in. (9 -10 Nm). Weighing .30 lb (.15 kg), this model also includes a Viton seal kit identified as part number: 990010006.