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This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes.Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics.
Most MOV tubes were cross-licensed copies of RCA types, with a British designation. For example, an MOV X63 valve was the same as an RCA 6A8 tube. Brimar, which stood for "British Manufactured American Radio" (valves), used all American designations. STC/Brimar was a UK subsidiary of the American giant ITT (International Telephone and Telegraph).
Parker-Hannifin Corporation, originally Parker Appliance Company, usually referred to as just Parker, is an American corporation specializing in motion and control technologies. Its corporate headquarters are in Mayfield Heights, Ohio , in Greater Cleveland (with a Cleveland mailing address).
In general, unaligned, unsubstituted PPV presents only moderate conductivity with doping, ranging from <<10 −3 S/cm (I2 doped) to 100 S/cm (H 2 SO 4-doped). [1] Draw ratios of up to 10 are possible. Alkoxy-substituted PPVs are generally easier to oxidize than the parent PPV and hence have much higher conductivities.
1. input airflow; 2. output airflow; 3. valve tubing; 4. valve casing; 5. internal rotor; 6. valve ports, or "knuckles"; 7. rotor spindle. A rotary valve (also called rotary-motion valve) is a type of valve in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes. [1]
Globe valve. A globe valve, different from ball valve, is a type of valve used for regulating flow in a pipeline, consisting of a movable plug or disc element and a stationary ring seat in a generally spherical body. [1] Globe valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle.
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