english 
A pneumatic piston actuator operates based
on the principle of converting air pressure into mechanical motion. It mainly
consists of a cylinder, a piston, and connecting rods.
When compressed air is introduced into one
side of the cylinder through an inlet port, the air pressure exerts a force on
the piston. According to Pascal's law, the pressure is evenly distributed
across the piston surface. This force causes the piston to move linearly within
the cylinder. For example, if the air is supplied to the left - hand side of
the piston, it will push the piston to the right.
The piston is connected to a rod, which
transfers the linear motion of the piston to the load or valve stem it is
attached to. When the air supply is reversed, the piston moves in the opposite
direction. This reciprocating motion can be used to control the opening and
closing of valves in industrial processes, or to drive mechanical devices that
require linear motion. In this way, pneumatic piston actuators provide a
reliable and efficient means of actuation in various applications.
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