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2. Solenoid valve - Wikipedia

   en.wikipedia.org/wiki/Solenoid_valve

   The solenoid valve (small black box at the top of the photo) with input air line (small green tube) used to actuate a larger rack and pinion actuator (gray box) which controls the water pipe valve. Solenoid valves are also characterized by how they operate. A small solenoid can generate a limited force.

3. Solenoid (engineering) - Wikipedia

   en.wikipedia.org/wiki/Solenoid_(engineering)

   The term "solenoid" also often refers to a solenoid valve, an integrated device containing an electromechanical solenoid which actuates either a pneumatic or hydraulic valve, or a solenoid switch, a specific type of relay that uses an internal electromechanical solenoid to operate an electrical switch; for example, an automobile starter ...

4. Gems Sensors & Controls - Wikipedia

   en.wikipedia.org/wiki/Gems_Sensors_&_Controls

   The company is also into manufacturing customized level sensors, pressure sensors, proximity switches, solenoid valves, fluidic systems, flow sensors, and Warrick controls. [2] It offers its products to different markets like alternative energy, semiconductor manufacturing, process tank gauging, waste water procession and other marine and ...

5. Valve - Wikipedia

   en.wikipedia.org/wiki/Valve

   The fill valve in a toilet water tank is a liquid level-actuated valve. When a high water level is reached, a mechanism shuts the valve which fills the tank. In some valve designs, the pressure of the flow fluid itself or pressure difference of the flow fluid between the ports automatically controls flow through the valve.

6. Control valve - Wikipedia

   en.wikipedia.org/wiki/Control_valve

   Pneumatic valve: Actuated using a compressible medium like air, hydrocarbon, or nitrogen, with a spring diaphragm, piston cylinder or piston-spring type actuator; Hydraulic valve: Actuated by a non-compressible medium such as water or oil; Electric valve: Actuated by an electric motor; A wide variety of valve types and control operation exist.

7. Electrohydraulic servo valve - Wikipedia

   en.wikipedia.org/wiki/Electrohydraulic_servo_valve

   The servo valves of the World War II-era were similar to this — using a solenoid to drive a spool valve. Advancement of EHSVs took off in the 1950s, largely due to the adoption of permanent magnet torque motors as the first stage (as opposed to solenoids).