Emerson 685SE Installationshandbuch PDF herunterladen (Seite 13)

Instruction Manual

D103799X012

685SE/685SR Piston Actuator

September 2014

10. Thread a suitable lifting eye into the free port on the top o f the piston rod (key 17).

11. Lift or hoist the piston assembly (keys 5, 6, 7, 17, and 19) out from cylinder (key 4) and place on a flat surface

upside down.

12. Remove the wear ring (key 6) and quad seal (key 7) from the piston (key 5).

13. Thread locking compound is applied to the threads by the manufacturer during initial assembly. As a result,

disassembly will require heating to loosen the t hread locking compound. To remove the piston rod Oring (key 19),

heat the piston assembly using a torch and unthread the piston rod (key 17) from the piston (key 5).

14. After the piston rod (key 17) has completely cooled, remove the piston rod Oring (key 19). Clean the piston rod

Oring groove with a light degreaser. Lightly grease a new piston rod Oring and install onto the piston rod.

15. Reinstall piston rod (key 17) onto piston (key 5) using thread locking compound.

16. Clean piston seal grooves. Install new lightly greased quad seal (key 7) onto piston (key 5).

17. Without grease, trim to length and then install a new wear ring (key 6).

18. Lift cylinder (key 4) vertically and place on a flat surface. Take extra precaution to avoid scratching or gouging the

inner diameter of the cylinder.

19. Remove the Oring (key 2) from the lower head (key 9) and clean the groove with a light degreaser.

20. Lightly grease the new Oring (key 2) and install on lower head (key 9).

21. Extract bearing assembly (keys 12, 13, 14, and 15) from outer spring cartridge (key 23) by removing the bearing

retaining ring (key 16).

22. Remove the piston wiper seal (key 15), Oring (key 13), and quad seal (key 12) from the bearing (key 14).

23. Clean bearing (key 14) with a light degreaser, if needed.

24. Lightly grease the new Oring (key 13) and quad seal (key 12), then install onto bearing (key 14). Without grease,

install a new piston wiper seal (key 15) onto the bearing.

25. R einstall bearing assembly (keys 12, 13, 14, and 15) into outer spring cartridge (key 23) and secure in place with

the bearing retaining ring (key 16).

26. Install cylinder onto lower head (key 9), making sure the Oring (key 2) does not move out of its groove.

27. Carefully install piston assembly (keys 5, 6, 7, 17, and 19) into the cylinder (key 4) using the lifting eye previously

used for removal. Ensure all seals and Orings stay in place on the outside diameter of the piston (key 5) during

installation.

28. I nstall tie bolts (key 3) into lower head (key 9).

29. Carefully install upper head (key 1)onto cylinder (key 4) using the lifting eyes previously used for removal. Take

care not to damage tie bolt (key 3) threads and ensure that the Oring (key 2) is in place during this step.

30. Install lock washers (key 10) and tie bolt hex nuts (key 11) onto tie bolts (key 4). Torque in a crisscross pattern

according to table 8.

If the actuator has a handwheel manual override proceed to step 31, otherwise proceed directly to step 35.

31. Remove the hex head cap screws (key 20) and lock washers (key 10) that secure the yoke (key 21) to the lower

head (key 9).

32. Using the same lifting eyes as in the Actuator Removal section, attach appropriate rigging gear and remove the

cylinderassemblyfromtheyoke(key21).Therigginggearshould allow the cylinder to be rotated freely. Rotate the

cylinder assembly to screw the engage/disengage block (key 43) onto the piston rod (key 17) until the gap

measured in step 2 is achieved.

33. Tighten the set screw (key 36) into the engage/disengage block (key 43).

34. Securethecylinderassemblytotheyokeusingthehex head cap screws (key 20) and lock washers (key 10).

Torque in a crisscross pattern according to table 8.

35. Refer to the Actuator Mounting section of this manual for instructions on mounting and installing the actuator

onto a valve.

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