March 2024
Safety Guide
DOC.SG.HX.1 Rev. 2
5
!
WARNING
Stay away from moving parts to prevent serious injuries. When test
cycling the actuator and valve assembly by applying pressure to
the A or B port (2 or 4 port), be aware that there are moving parts
like pinion top, actuator to valve coupling and the valve blade, ball
or plug, etc. Isolate the piping system on which an actuator-valve
assembly is installed, when removing this assembly, relieve any
media pressure that may be trapped in the valve cavities before
removing the actuator for maintenance.
3.2 Operation
!
WARNING
When rotating the actuator stem or shaft with loading pressure
applied, use caution to keep hands and tools out of the actuator
travel path. Personal injury and property damage is possible
if something is caught between the actuator stem and other
control valve assembly parts.
3.2.1 Operating Media
1. Use clean, dry or lubricated air or inert gas.
2. Maximum Operating Pressure (MOP) = 8.3 barg / 120 psig,
MOP is the pressure required to produce the maximum
rated torque at the break position for all actuators. Pressure
should not exceed MOP during valve rotation. MOP should
be the maximum pressure regulator setting.
!
WARNING
It can be assured that the housing will not rupture or burst
when applying 10 bar of pressure but the cycle function cannot
be guaranteed as it totally depends on the time span to which
actuator is subjected at 10 bar and the frequency at which these
pressure peaks occurs. Every time this peak occurs will, for
sure, have a signicant negative eect on the life expectancy of
the actuator.
Hytork XL-Series Actuators
Section 3: Hytork XL-Series Actuators
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