Valve Actuator Symbols

valve actuator
Actuators are used for the automation of industrial valves and can be found in all kinds of technical process plants: they are used in wastewater treatment plants, power plants and even refineries. This is where they play a major part in automating process control.
The valve parts through which force is applied to move or position flow-directing elements.

symbols
A thing that represents or stands for something else, esp. a material object representing something abstract
(symbolic) emblematic: serving as a visible symbol for something abstract; "a crown is emblematic of royalty"; "the spinning wheel was as symbolic of colonical Massachusetts as the codfish"
(symbol) something visible that by association or convention represents something else that is invisible; "the eagle is a symbol of the United States"
A mark or character used as a conventional representation of an object, function, or process, e.g., the letter or letters standing for a chemical element or a character in musical notation
(symbol) an arbitrary sign (written or printed) that has acquired a conventional significance
A shape or sign used to represent something such as an organization, e.g., a red cross or a Star of David