SUN HYDRAULICS
SCCBCBN

***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 SCCBCBN (SCCBCBN) is an atmospherically referenced, direct-acting sequence valve designed for applications requiring load holding. This valve allows a secondary circuit to receive flow once the inlet port pressure exceeds a predefined setting. It features an integral check valve that enables reverse flow from port 2 to port 1, ensuring efficient system operation. The pressure setting controls the pressure at port 1 relative to atmospheric venting, making it suitable for situations where a drain connection is not feasible. However, users should note that these valves may experience external leakage or moisture ingress over time, with approximately one drop (0.07 cc) of fluid entering the vented chamber every 4000 cycles. The SCCBCBN incorporates Sun's floating style construction to reduce binding risks due to excessive installation torque or machining variations. It fits into a T-13A cavity and handles a capacity of up to 15 gpm (60 L/min), with factory pressure settings established at 2 in/min (30 cc/min). The maximum operating pressure is rated at 5000 psi (350 bar), and it typically responds within 2 milliseconds. Notably, the maximum valve leakage at reseat is limited to 10 drops per minute (0.7 cc/min), while the check valve cracking pressure stands at 40 psi (2.8 bar). For adjustment purposes, approximately five clockwise turns increase the setting, with specific torque requirements for installation and locknut adjustments provided for optimal performance and reliability. The valve's compact design weighs just .30 lb (.15 kg) and uses Viton seals in its construction for enhanced durability in various hydraulic environments.