Engineering

"Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.
The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.
A control valve consists of three main parts in which each part exist in several types and designs: Valve's actuator, Valve's positioner, Valve's body.
" [Control valves. Wikipedia]
The vector stencils library Valve assembly contains 93 symbols of parts of hydraulic and pneumatic control valves, including directional control valves, flow control valves, pressure control valves, and electrohydraulic and electropneumatic valves. Use it to design engineering drawings and diagrams of fluid power, hydraulic and pneumatic control valves using ConceptDraw PRO diagramming and vector drawing software.
The symbol library Valve assembly is contained in the Mechanical Engineering solution from Engineering area of ConceptDraw Solution Park. www.conceptdraw.com/ solution-park/ engineering-mechanical