HYDRAFORCE
5621821.M207

***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 5621821.M207 (5621821.M207) is a screw-in, cartridge-style, internally piloted unloading valve designed specifically for accumulator-type hydraulic systems. This particular model, known as the UPCV10-F41, integrates an internal check valve with a fixed reload pressure ratio of 80%. The valve operates by blocking flow from port 3 to port 4 and allowing flow from port 1 to port 2 in its steady state. When a predetermined pressure is reached at ports 2 and 3, the spool shifts to permit free flow from port 3 to port 4, effectively unloading the pilot at port 3. If the pressure at port 2 falls below the established reload value ratio, the valve automatically closes, blocking flow once again from port 3 to port 4. The design includes a spring chamber vented to port 4. Notable features of this model include an internal check valve and optional fixed reload pressure ratios. It is constructed with a hardened precision spool and cage for enhanced longevity and offers a choice of seal options to suit various application needs.