Modulated or on-off control

Automated valves can be operated with electric, pneumatic, electro-pneumatic, and electro-hydraulic powered actuators. Actuators allow valves to be operated automatically by a control system or manually from a remote location. Valve automation brings significant advantages to a plant in the areas of process quality, efficiency, safety, and productivity.

Control valves modulate the flow of fluids in flow, pressure, level, and temperature control systems. They consist of three main parts: a valve body, actuator, and positioner. The positioner, through the actuator, drives the valve in proportion to a control signal. Various types of valve and actuator combinations are available to suit most process control applications.