HYDRAFORCE
5621820.4.4

***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 5621820.4.4 (5621820.4.4) is a screw-in, cartridge-style valve known as the UPCV10-F41, designed for use in accumulator-type hydraulic systems. It functions as an internally piloted, pilot unloading valve and includes an internal check valve with a fixed reload pressure ratio of 80%. In its default state, the valve blocks flow from port 3 to port 4 while allowing flow from port 1 to port 2. When a set pressure is reached at ports 2 and 3, the spool shifts, permitting free flow from port 3 to port 4 and unloading the pilot at port 3. Should the pressure at port 2 fall below the established reload value ratio, the valve closes to block flow again from port 3 to port 4. The spring chamber of this component is vented to port 4 for efficient operation. Notable features include an internal check valve and optional fixed reload pressure ratios, along with a hardened precision spool and cage that enhance durability and longevity. Additionally, users can choose from various seal options to suit specific application needs.