RACK & PINION ACTUATORS
2R40 to 2R1750 Series
Installation & Maintenance Manual
1
October 24, 2013
www.atcontrols.com
Engineering\documents\products\IOM\IOM1003.docx
TRIAC
2R Series Actuators:
Attention: Instructional videos on some of the information provided below can be found on our website
www.atcontrols.com (
http://www.a-tcontrols.com/videos/
).
1. Installation of Actuator:
Triac actuators are mounted directly to valves or adapted
to the valve by means of an intermediate bracket and
coupler. The coupler adapts the output of the actuator to
the valve shaft. Standard mounting kits provide mounting
of the actuator in the direction of the pipe. Pipelines can
be horizontal, vertical, or other positions. When mounting
the actuator to a valve using a mounting kit, the pinion
drive, coupling device and valve stem should be centered
and concentric to prevent any side loading to the bottom
pinion radial bearing and valve stem seal area.
After mounting, it may be necessary to adjust the end of
travel stop for proper open or closed valve position.
Pneumatically stroke the actuator several times to assure
proper operation with no binding of the coupler.
2. Air
Supply:
Pneumatic piping to the actuator and associated accessories should follow the best practices for instrument
pneumatic piping systems, ie line free of water, oil, pipe sealant or other contaminants. The operating medium
is to be filtered dry air or inert gas which is filtered to 50 micron particles size or less. It is extremely important
that the actuator be powered with the proper air pressure and air volume. Maximum working pressure is 150
PSI.
The spring housing on spring return actuators, if not piped, will breathe through the right hand port. It’s
important that it not be exposed to a corrosive atmosphere. Please contact Triac Controls for possible
solutions if this condition exists.
3. Lubrication:
Triac actuators are factory lubricated for life and additional lubrication is not normally required. However, for
actuators performing 100,000 cycles or more, an oil mist lubricator is recommended. Oil mist lubrication
requires a mineral oil type ISO VG32 Class 1 for usage in temperature range 15 to 158 Deg. F. Oil mist
lubricator must be set to the lowest setting. Once begun, the oil mist lubrication cannot be discontinued.
Caution: If the actuator is equipped with a pneumatic positioner or pneumatic controller, oil mist lubricated air
cannot be used unless the instrument manufacturer indicates that the instrument is compatible with lubricated
air.
Description
Section
Installation of Actuator
1
Air Supply
2
Lubrication
3
Travel Adjustment
4
Spare Parts
5
Operation – Double Acting
6
Operation – Spring Return FCW
7
Disassembly Procedures
8
Assembly Instructions
9
Actuator Testing
10
Cycling of infrequently used
actuator
11
Bill of Materials
12
Service
13
