SUN HYDRAULICS
CDACBBN

***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 CDACBBN (CDACBBN) is a compact, efficient back-to-back check valve designed for hydraulic systems that require reliable, low-leakage flow control. This innovative valve integrates two simple check valves into one cartridge, facilitating the connection of the higher of two work ports to a signal or common port. With an external load port located at the hex-end and signal sensing at port 2, it ensures streamlined operations in various applications. The CDACBBN features hardened, spherically lapped guided poppets and a lightly stressed helical spring, which contribute to its exceptional wear characteristics and minimal leakage rates, specified at 5 drops/min or 0.3 cc/min. These design elements make it particularly suitable for applications where durability and precision are critical. Additionally, the valve's construction incorporates Sun’s floating style design which minimizes internal part binding—a common issue in systems subject to excessive installation torque or cavity/cartridge machining variations. With a maximum operating pressure of 5000 psi (350 bar) and a flow capacity of 2.5 gpm (10 L/min), this model is built to handle demanding tasks efficiently. The CDACBBN’s hex size is 7/8 in. (22.2 mm), and it requires an installation torque between 30-35 lbf ft (41-47 Nm). Weighing just .30 lb (0.15 kg), it is lightweight yet robust enough for both mobile and industrial applications. The valve utilizes Viton seals (990010006) for enhanced performance under varying conditions. This back-to-back check valve does not facilitate lowering signals; hence provisions should be made to bleed off trapped high signals when load pressures decrease.