Warning:
Before proceeding with any Installation the following instructions must
be respected:
- Always wear protective clothing, gloves, and eyewear to prevent
personal injury.
- Use the lifting point foreseen on the actuator to move the actuator:
if different instructions are not well specified the lifting points
foreseen on the actuator must be used only to move the actuator.
- Check with your process or safety engineer for any additional
measures that must be taken to protect against process media.
5.6.1 Checks to be performed before installation
If the SC/VHS actuator is purchased separately, proceed as follows before assembling it onto the
valve:
1) Check that the coupling dimensions of the actuator/coupling block flange and stem meet the
specified coupling dimensions.
2) Prepare the necessary tools for the assembly and setting of the unit.
3) Check that the outer surface of the actuator is free from dust and dirt.
4) Clean the actuator flange and remove anything that might prevent a perfect adherence to the
actuator/coupling block flange and joint especially all traces of grease.
5.6.2 Assembling of the actuator on the valve
The actuator can be assembled on top of the valve flange by using the lifting eyelets installed on
hydraulic cylinder flange.
The assembly position of the actuator, with reference to the valve,
must comply with the plant requirements.
To assemble the actuator onto the valve proceeds as follows:
• Check that the coupling dimensions of the valve flange and stem,
or of the relevant extension, meet the actuator coupling
dimensions (valve stem and flange).
• To make easier the assembly, the valve stem has to be in perfect
vertical position.
• Disassemble the two halves of actuator shell joint (Fig. 7.2) by
unscrewing the retaining screws.
• Lift the actuator by utilizing the proper lifting eyelets, and unscrew
the nuts and the stud bolts from the actuator pedestal.
• Assemble the actuator onto the valve, and arrange it in its correct
vertical position proper to connection between valve stem and
actuator cylinder rod.
• Connect the valve stem and the actuator stem in their place into
the shell joint and refit the second half, tighten the screws fixing common
• Screw the stud bolts into the actuator pedestal flange, and screw the nuts on the stud bolts.
• Tighten according to the nut size torque requirements.
To Next Page
Loading...
Need help?
General
