LC25A20D7X/-004

***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 Bosch Rexroth directly.***
The Bosch Rexroth LC25A20D7X/-004 (R900965929) is a high-quality 4-way cartridge valve designed for integration into a compact block design. This particular model offers versatile functionality, allowing for pressure, directional, and throttle control or a combination of these functions when paired with the appropriate pilot control valves. The LC25A20D7X/-004 is engineered to provide particularly efficient solutions by being adjustable to various flow requirements of different actuator ways, making it a cost-effective option for multiple function applications. The valve consists of a control cover that includes control bores and may feature additional functionalities such as stroke limitation, hydraulically controlled directional seat valves, or shuttle valves depending on the required overall function. Furthermore, electrically operated directional spool or seat valves can be incorporated into the control cover for enhanced control capabilities. The installation kit comprises essential components like bushings, rings (up to NG), valve poppet (with or without damping nose), and closing spring. Functionally, this 4-way cartridge valve operates based on pressure differences across three key areas: A1, A2, and A3. The area at the valve seat (A1) is critical in determining the functionality of the valve. Depending on the version of the valve, there are different annulus areas (A2) which are proportionate to A1 by specific ratios – either 0.7:1 or 0.3:1. The area A3 is equal to the sum of A1 and A2. These differing area ratios influence the opening and closing forces acting upon the valve's spool position. For operational directionality, this model allows flow from A to B or vice versa while ensuring that pressurization of area A3 via pilot oil discharge from channel B or an external pilot oil supply results in channel A being blocked without leakage. Valve poppets come with options for damping nose configurations which can affect cracking pressures due to their influence on area ratios within the valve design.