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2. Gate valve - Wikipedia

   en.wikipedia.org/wiki/Gate_valve

   Gate valve. An electric multi-turn actuator on a gate valve. A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little space along the pipe axis and hardly restrict the flow of fluid when the gate is fully opened. The gate faces can be parallel but ...

3. List of valves - Wikipedia

   en.wikipedia.org/wiki/List_of_valves

   The inside of an extremely large butterfly valve Duplex ball valve Three check valves in corrosion-resistant Hastelloy Stainless steel gate valve. Valves can be categorized into the following types, based on their operating mechanism: Ball valve, for on–off control without pressure drop. Ideal for quick shut-off, since a 90° turn completely ...

4. Valve actuator - Wikipedia

   en.wikipedia.org/wiki/Valve_actuator

   Valve actuator. Electric actuator (blue cylinder) on a valve in a power plant. A black handwheel is visible on the actuator, which allows manual positioning of the valve. The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator.

5. Diaphragm valve - Wikipedia

   en.wikipedia.org/wiki/Diaphragm_valve

   Diaphragm valves (or membrane valves) consists of a valve body with two or more ports, a flexible diaphragm, and a "weir or saddle" or seat upon which the diaphragm closes the valve. The valve body may be constructed from plastic, metal, wood or other materials depending on the intended use.

6. Floodgate - Wikipedia

   en.wikipedia.org/wiki/Floodgate

   Jet flow gate, similar to a gate valve but with a conical restriction prior to the gate leaf that focuses the water into a jet. They were developed in the 1940s by the United States Bureau of Reclamation to allow fine control of discharge flow without the cavitation seen in regular gate valves. Jet flow gates are able to handle heads up to 150 m.

7. Nanoscale vacuum-channel transistor - Wikipedia

   en.wikipedia.org/wiki/Nanoscale_vacuum-channel...

   In fact, in silicon, the velocity of electrons is limited to 1.4×10 7 cm/s. [9] However, in vacuum electrons do not suffer from scattering and can reach velocities approaching the speed of light (3×10 10 cm/s). Therefore, a vacuum-channel transistor can operate at a faster speed than a silicon solid-state transistor.