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Installation, Operation, and Maintenance Manual
ES-09373-1
Mechanical Installation
The installation of the positioner will depend on the actuator type (linear or rotary).
The following shows the types of pneumatic actuators and a brief overview of their
operation.
Be sure to install the air filter and regulator before the positioner. The supply pressure
should be sufficient to fully open and close the valve.
5.1
What are Rotary Pneumatic Actuators?
Rotary pneumatic actuators are devices that convert the stored energy of compressed
air into a rotary mechanical motion. These devices can be single-acting, where they
receive air to open or close the valve and return to their original position by means of
a spring, without the need for air, or double-acting, which requires compressed air to
move in both directions.
Figure 5-1 Rotary Actuator Types
5.2
What are Pneumatic Linear Actuators?
Linear pneumatic actuators are devices that convert the stored energy of compressed
air into a linear mechanical motion. This linear motion allows the valve to open or
close.
Similarly, to rotary actuators, they can also be single-acting, requiring air for only one
direction, or double-acting, requiring air for both directions.
Figure 5-2 Linear Actuator Types
Observe the maximum pressure that the pneumatic actuator can withstand.
Diaphragm actuators can be easily damaged by excessive pressure.
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Mechanical Installation
August 17, 2022
Mechanical Installation
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