Actuation: what, which and how?

摘要

Actuator basics A valve actuator is a device that utilizes power to operate a valve. The power can from an operator i.e., applying force on the hand wheel of a gearbox to open or close a valve, or it can be from a smart electronic device with sophisticated control and measuring devices. An actuator is defined as a device that produces linear or rotary motion from power under the action of a source of control.