SUN HYDRAULICS
COHCXZN

***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 COHCXZN (COHCXZN) is a highly efficient pilot-to-close check cartridge valve, designed for robust hydraulic applications. This model features a spring-biased closed configuration that allows flow from port 1 to port 2 while effectively blocking reverse flow under any condition. Notably, the valve operates with a nominal pilot ratio of 1.8:1, meaning that a pressure of 1000 psi at the pilot port can close the valve against a pressure of 1800 psi at port 1. The COHCXZN incorporates Sun's floating style construction which minimizes internal parts binding, enhancing reliability even when faced with excessive installation torque or variations in cavity/cartridge machining. The valve is designed for use within T17A cavities and is part of the Series 3 lineup from Sun Hydraulics. It supports a maximum operating pressure of up to 5000 psi and has a capacity of handling up to 80 gpm (320 L/min). Key specifications include a maximum valve leakage rate at 110 SUS (24 cSt) of approximately one drop per minute, ensuring minimal loss and efficient operation. The valve's hex size is standardized at 1-1/4 inches (31.8 mm), with an installation torque range between 150 \u2013 160 lbf ft (203 \u2013 217 Nm). The model weighs around 1.80 lb (0.80 kg), making it suitable for various industrial applications where high-pressure control and fluid flow management are critical. Additionally, it uses Viton seals for enhanced durability and performance under varied conditions.