Page 102 - Pneumatic ebook (2)_draft 13 sept 2021

Linear Actuator – double acting cylinder

Double acting
air inlet cylinder rod cylinder

1. Double acting cylinder has two air inlets to create power
strokes in two directions which is extending and retracting
as air pressure is applied alternately to the air inlets.

2. Double acting cylinders are commonly used in the
application where larger stroke length is required.
Double acting cylinder
3. One of the advantage of the double- acting cylinder is that
the cylinder is able to carry out work in both directions of
motion.

4. For the forward stroke, the force transferred by the piston
rod is greater than for the return stroke because of
effective piston surface is reduced on the piston rod side
Symbol of double acting
cylinder by the cross-sectional area of the piston rod. However this
is only a consideration if the cylinder is used to “pull” the
Construction of double
acting cylinder same load in both directions.

INTRODUCTION TO PNEUMATIC SYSTEM 46