Emerson F-Series Installation, Operation And Maintenance Manual page 8

Section 2: Installation
November 2015
All Bettis actuators are shipped in the fail clockwise (Left-Hand) orientation unless
ordered as fail counter-clockwise (Right-Hand). The orientation may be reversed in the
field by moving all accessories to the opposite side of the shaft and turning the actuator
top–side down.
Spring-Return (Left-Hand): pressure on the end cap ports pushes the pistons inward
and causes counterclockwise rotation. Springs push the pistons outward resulting in a
clockwise rotation.
Spring-Return (Right-Hand): pressure on the end cap ports pushes the pistons
inward and causes clockwise rotation. Springs push the pistons outward resulting in a
counterclockwise rotation.
Figure 3
5
Installation, Operation and Maintenance Manual
Fail Clockwise
Fail Counter Clockwise
RGS011110-3 Rev. 0
Installation