Emerson Hytork XL Series - Actuator to Valve Installation; Bi-directional Travel Stops Adjustment

November 2022
Installation, Operation and Maintenance Manual
MAC050515 EN Rev. 0
6 Actuator to Valve Installation
Section 4: Actuator to Valve Installation
Section 4: Actuator to Valve Installation
The pinion drive, coupling device, and valve stem should be centered and concentric to
prevent any side loading to the pinion radial bearing and valve stem seat area. Ensure that
the coupling shaft to be operated is a tight but free sliding t into the female drive in the
actuator pinion (19).
4.1 Bi-directional Travel Stops
Hytork XL actuators have two travel stops (22, 23, and 24) for setting accurately the travel
and the open and closed positions. XL2586 and XL4581 can be tted with the optional
bottom stop block for setting the travel.
The actuator has a factory set stroke of 90°. The adjustable stroke range of the actuator is:
• at closed (0°) position: -3° to +7°
• at open (90°) position: -83° to +93°
NOTE:
If the actuator is assembled for reverse operation, instead of standard operation, Stop “1”
will adjust the “open” position and stop “2” the “closed” position (refer to Figure 1).
Figure 1 Travel Stops
“2” “1”
Stop marked Stop marked
View from top
“2”
“1”