HYDRAFORCE
5621820.M186

***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 Hydraforce directly.***
The Hydraforce 5621820.M186 (5621820.M186) is a screw-in, cartridge-style, internally piloted pilot unloading valve designed specifically for accumulator-type hydraulic systems. This model, known as the UPCV10-F41, features an internal check valve and a fixed reload pressure ratio of 80%. In its steady state, the valve effectively blocks flow from port 3 to port 4 while allowing flow from port 1 to port 2. Upon reaching a predetermined pressure at ports 2 and 3, the spool shifts to permit free flow from port 3 to port 4, thereby unloading the pilot at port 3. If the pressure at port 2 falls below the established reload value ratio, the valve automatically closes to block flow from port 3 to port 4. The spring chamber is vented to port 4 for enhanced operational efficiency. The design includes hardened precision spool and cage components for extended durability and offers optional seal choices for varied applications.