SUN HYDRAULICS
CNFBXBN

***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 CNFBXBN (CNFBXBN) is a high-performance check valve designed for hydraulic applications requiring reliable one-way flow and controlled reverse flow. This valve features a free flow from port 1 to port 2, while a customer-specified orifice restricts the flow from port 2 to port 1, ensuring precise control in hydraulic circuits. The specified orifice diameter can range between 0.4 mm to 2.0 mm, and this dimension is conveniently stamped on one of the hex faces of the cartridge for easy identification. Engineered with Sun's deeper relief style cavity, the CNFBXBN is unique in its class and not interchangeable with other Sun check valves, thus offering specialized performance for specific applications. It operates efficiently up to a maximum pressure of 5000 psi (350 bar) and has a capacity of up to 30 gpm (120 L/min), making it suitable for robust hydraulic systems. Additionally, the CNFBXBN incorporates Sun's floating style construction which minimizes potential internal binding caused by excessive installation torque or variations in cavity/cartridge machining. This design enhancement ensures consistent operation and longevity of the valve even under tough conditions. The valve requires an installation torque between 45 - 50 lbf ft (61 - 68 Nm) and uses Viton seals (Part No: 990203006) for enhanced durability against fluid corrosions and temperature variations within hydraulic systems. The valve's hex size is measured at 1-1/8 inches (28.6 mm), facilitating easy installation with standard tools.