pneumatic controls are most commonly used
Pneumatics (from Greek πνεῦμα pneuma 'wind, breath') is the use of gas or pressurized air to create mechanical motion in mechanical systems. [1] Pneumatic systems used in industry are commonly powered by compressed air or compressed inert gases. A basic pneumatic system consists of an intake filter that traps dirt before it enters the system, an air compressor that provides a source of compressed air, a dryer that removes the moisture in the air, a pressure tank that is a reservoir of compressed air, a pressure regulator that maintains air pressure, a valve that controls the air flow ... A pneumatic system is a connection of various components such as (compressors, intercoolers, controllers, and actuators), that converts the pressure energy of compressed air into mechanical work. Pneumatic systems are used where human strength and accuracy are not enough.
Pneumatic Controls – Accudyne Systems, Inc
