Assembly With The Final Control Element - ABB LME620-AN Operating Instruction

14 LME / RSD10 / RSD20 / RSD50 / RSD100 (Contrac) ELECTRICAL LINEAR ACTUATOR | OI/LME/RSD10/100-EN REV. G
... 5 Installation

Assembly with the final control element

1. Retract the thrust rod fully and place the actuator onto the
valve yoke.
2. Make sure the valve stem is aligned with the center of the
bore and at right angles to the actuator seat (permissible
parallel deviation < 0.1 mm (0.009 in) in relation to the total
stroke).
3. Fasten the actuator on the valve yoke using slightly oiled
screws of property class 8.8 (tensile strength 800 N/mm
2
[116,032 lbf/in ]; yield strength 640 N/mm
Note
Observe the fastening torques and thread dimensions in the
actuator flange!
Actuator
LME
RSD10 / RSD20
RSD50
RSD100
4. Use the handwheel to extend the thrust rod; link the rod with
the valve stem via the coupling.
5. Manually retract the thrust rod to check whether or not the
external limit stop of the actuator is on the housing flange
before the valve cone touches the cover.
6. If required, adjust with the coupling (only possible within
certain limits!).
2
[93,550 lbf/in
Tightening torque Flange thread
20 Nm (14.75 lbf-ft)
175 Nm (129.07 lbf-ft) M16-20 deep
340 Nm (250.77 lbf-ft) M20-25 deep
340 Nm (250.77 lbf-ft) M20-25 deep
2
2
]).
M8-15 deep