IT 150: Pneumatic Actuators and Control Valves

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double acting

two ports, no spring, exerts work in two directions (forward and backward), uses compressed air in both strokes, speed control in both directions

motor

uses air pressure to create a turning force (rotary) called torque at motor shaft

check valve

allows flow in one direction and prevents flow in the other direction

speed control valve

controls the direction of flow and the speed of actuators

cylinders

device used to produce linear motion

directional control

devices which influence the path taken by an air stream. represented by two numbers (# of ports/ # of positions)

ways valves can be actuated/operated

mechanical or manual, pilot, electrical, combo

single acting

one port, has a spring, exerts work in one direction, uses compressed in forward stroke and return is achieved by spring, speed control in one direction

on-off valve

only allows air to move in one direction

pressure regulator

relief and pressure limiters

flow control valve

restricts flow using a needle point stem, controls speed of hydraulic/pneumatic cylinders and motor when connected in parallel with a check valve

categories of cylinders

1.) single acting 2.) double acting

basic assemblies of a cylinder

1.) barrel and head 2.) piston and piston head


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