SUN HYDRAULICS
COFCXBN

***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 COFCXBN (COFCXBN) is a spring-biased, pilot-to-close check cartridge valve designed for hydraulic systems. This model features a nominal pilot ratio of 1.8:1, allowing it to maintain control under varying pressure conditions. Specifically, it requires a pilot pressure of 1000 psi to close against a pressure of 1800 psi at port 1. The valve facilitates flow from port 1 to port 2 while completely blocking any reverse flow from port 2 to port 1, ensuring unidirectional fluid control. Engineered for high performance, the COFCXBN can handle a maximum flow capacity of 40 gpm (160 L/min) and withstands up to 5000 psi (350 bar) of operating pressure. It exhibits minimal leakage, with a maximum rate of one drop per minute at an oil viscosity of 110 SUS (24 cSt). The valve's construction incorporates Sun\u2019s floating style design which minimizes internal parts binding\u2014a common issue stemming from excessive installation torque or variations in cavity/cartridge machining. This model also features a hex size of 1-1/8 inches (28.6 mm) and requires an installation torque between 45 and 50 lbf\u00b7ft (61 - 68 Nm). Weighing just half a pound (0.25 kg), the COFCXBN is compact yet robust enough to be integrated into various hydraulic circuits without adding significant weight or bulk. Its efficiency and reliability make it suitable for applications requiring precise control over fluid flow in one direction while preventing any backflow under all conditions.