For sale: new RexRoth REXROTH R900703911 solenoid valve. A solenoid valve is a device used to control the flow of liquids or gases in a hydraulic or pneumatic circuit system. RexRoth solenoid valves are considered among the best in the world for their reliability, precision, and durability. RexRoth REXROTH R900703911 solenoid valves consist of a valve body and a solenoid. When the solenoid is activated, it generates a magnetic field that moves a piston or diaphragm inside the valve, allowing the liquid or gas to flow through. This flow is controlled by a series of orifices and passages inside the valve, which can be opened or closed depending on the electrical signal sent to the solenoid. RexRoth REXROTH R900703911 solenoid valves are designed to offer high performance and long life, even in harsh operating conditions. Their precision and reliability make them ideal for applications in sectors such as the automotive industry, aerospace industry, chemical industry and many others.