Emerson Hytork XL Series Safety Manual page 12

Section 3: Hytork XL-Series Actuators
March 2024
8
!
CAUTION
A spring-return actuator mounted on a valve, which is stuck
in mid stroke, contains a high spring load which will cause a
sudden rotation during disassembly of the actuator versus the
valve or valve bracket. This can cause serious injury to personnel
or damage to material. Hytork actuators are equipped with
the SAFEKEY design that allow in-field removal of the end caps.
Refer to Section 9 of Manual MAC050515 EN for instructions
to safely remove the spring load using retractor rods, before
disassembling the actuator from a valve, which is stuck in
mid stroke.
Safety Guide
DOC.SG.HX.1 Rev. 2
Hytork XL-Series Actuators