____________________________________________________________________________________
STI S.r.l. – Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 5100, rev. 06 06/2020 – RTC/RTCS
- 22 -
Remove the nuts (2.8) from tie rods, remove the end flange (2.23) after that replace the o-ring (2.18) from
the seal groove.
Remove
the cylinder tube
(2.3) to replace the sliding guide (2.12) and o-ring (2.19) from the seal groove,
remove the spacer tube
(2.4) to replace the o-ring between the cylinder tube and spacer tube and the o-
ring (2.18) on the head flange.
Before re-assemble clean all seal grooves carefully and lubricate them with protective oil or grease film.
Fig. 14 – Pneumatic cylinder seals replacement of single acting actuator
Check that the pneumatic cylinder is proper assembled before carry out any other maintenance
operation.
To replace o-ring (2.17) , screw the travel stop screw to disengage the 2 off half rings (2.20) from flange
(2.7), after that disassemble the elastic ring (2.1) remove the 2 off half rings (2.20) disassemble the flange
(2.7) unscrew the screw (2.15) replace the o-ring. Clean the seal groove e re-assemble the o-ring, the
flange, the half rings and elastic rings. Unscrew the travel stop screw to verify that the half rings with the
spring fully released are engaged into the flange (2.7)
