_____________________________________________________________________________________
STI S.r.l.
– Via Dei Caravaggi 15, 24040 Levate (BG) – ITALY www.imi-critical.com
Manual 5400, rev. 05 02/2018
– RTQHS
23
Fig. 14
– Scotch yoke mechanism seals replacement
At these point is possible replace the O-ring on the bottom of the scotch yoke:
Remove the guide bar (1.1), extract the scotch yoke and guide block, disassemble the bushing (1.3) and
then replace the O-rings (1.12 - 1.13).
Fig. 15
– Scotch yoke
mechanism seals
replacement
To replace the gasket between actuator and spring cartridge, once the cover (1.5) has been removed, is
necessary to remove the screw (1.11) to disengage the guide block from spring cartridge after that remove
the fixing nut (5.3) on the spring cartridge side, remove the spring cartridge (3) and replace the gasket (5.2),
before replace gasket clean the actuator housing surface and spring cartridge head flange.
Summary of Contents for STI RTQH Series
Page 41: ......
