Operation
EL-O-MATIC rack and pinion
actuators are manufactured with an integral air manifold and internal porting.
The air manifold is designed to NAMUR standards for direct mounting of
the EL-O-MATIC solenoid valve module. This eliminates the need for
external tubing and simplifies installation. For applications not
requiring a solenoid valve, the air manifold inlet ports are marked "A"
and "B". |
Air-To-Air
(Double Acting)
 Air
To Port "A"
Pressure is applied to the central chamber driving the dual opposing
pistons outward. Linear piston force is transferred via gear racks
to the pinion gear to produce rotary (counterclockwise) motion. |
 Air
To Port "B"
Pressure is applied to the outside chambers through the internal port
driving the pistons inward to produce rotary (clockwise) motion. |
Spring Return
(Single Acting)
 Air
To Port "A"
Pressure is applied to the center chamber driving the pistons outward.
This compresses the springs in the outside chambers and produces rotary
(counterclockwise) motion. |
 Loss
of Pressure
Upon loss of pressure the stored energy in the compressed springs drives
the pistons inward producing rotary (clockwise) motion. This "fail
safe" position is held until air pressure is reapplied to Port "A". |
