TRIAC 2R Series - Operation - Double Acting; Operation - Spring Return


RACK & PINION ACTUATORS
2R40 to 2R1750 Series
Installation & Maintenance Manual
3 October 24, 2013
www.atcontrols.com
Engineering\documents\products\IOM\IOM1003.docx
6. Operation – Double Acting:
CCW:
Air is supplied to Port A forcing the pistons away
from each other (toward ends) which rotates the
drive pinion counterclockwise and exhausts the air
out of
Port B.
CW:
Air is supplied to Port B forcing the pistons toward
each other (toward center) which rotates the drive
pinion clockwise and exhausts the air out of Port A.
7. Operation – Spring Return (Fail CW):
CCW:
Air is supplied to Port A forcing the pistons away
from each other (toward ends), which rotates the
drive pinion counterclockwise, compresses the
springs and exhausts air out of Port B.
FAIL CW:
Air failure (loss of pressure) allows the compressed
springs to force pistons toward each other (toward
center), which rotates the drive pinion clockwise
and exhausts air out of Port A.
*(Unit is capable of failure in counterclockwise direction by reversing pistons inside of housing.)
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