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2. Pneumatic actuator - Wikipedia

   en.wikipedia.org/wiki/Pneumatic_actuator

   Pneumatic rack and pinion actuators for valve controls of water pipes. A pneumatic actuator mainly consists of a piston or a diaphragm which develops the motive power. It keeps the air in the upper portion of the cylinder, allowing air pressure to force the diaphragm or piston to move the valve stem or rotate the valve control element.

3. Valve actuator - Wikipedia

   en.wikipedia.org/wiki/Valve_actuator

   Air (or other gas) pressure is the power source for pneumatic valve actuators. [1] They are used on linear or quarter-turn valves. Air pressure acts on a piston or bellows diaphragm creating linear force on a valve stem. Alternatively, a quarter-turn vane-type actuator produces torque to provide rotary motion to operate a quarter-turn valve.

4. Limit switch - Wikipedia

   en.wikipedia.org/wiki/Limit_switch

   A limit switch mounted on a moving part of a bridge. In electrical engineering, a limit switch is a switch operated by the motion of a machine part or the presence of an object. A limit switch can be used for controlling machinery as part of a control system, as a safety interlock, or as a counter enumerating objects passing a point. [ 1]

5. Control valve - Wikipedia

   en.wikipedia.org/wiki/Control_valve

   Control valve. A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [ 1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level. In automatic control terminology, a control ...

6. Rotary actuator - Wikipedia

   en.wikipedia.org/wiki/Rotary_actuator

   Rotary actuator. A rotary actuator is an actuator that produces a rotary motion or torque . The simplest actuator is purely mechanical, where linear motion in one direction gives rise to rotation. The most common actuators are electrically powered; others may be powered pneumatically or hydraulically, or use energy stored in springs .

7. Kelly emerges as a top contender for Harris’s VP pick - AOL

   www.aol.com/kelly-emerges-top-contender-harris...

   Sen. Mark Kelly (D-Ariz.) has risen to near the top of the list of possible running mates as Vice President Harris considers whom she wants to run alongside her. Kelly has been sent vetting ...