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KTM VIRGO SERIES N TRUNNION MOUNTED BALL VALVES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
11.2 Notes
• Ensure clean environment during
disassembly and re-assembly of valve.
• Use appropriate material handling / lifting
equipment. Refer handling section of
this IOM.
• Prior to disassembly, it is recommended to
mark mating parts like body and adapter,
body and housing, body and trunnion,
gear operator or actuator and ISO pad or
housing to ensure same orientation during
re-assembly.
• Before dis-assembly, it is recommended to
keep the ball in fully closed position and then
remove the operator from valve assembly.
• Valve shall be positioned on clean and flat
surface with adapter end flange on top as
shown in Figure 17.
FIGURE 17
2-piece ball valve
• It is recommended to use original spares.
• Graphite gaskets shall be replaced.
• Elastomer and plastomer seals can be re-
used, however it is recommended to replace
them to maximize valve service life.
• Protect every sealing surface from nicks,
dents and damages.
• Lubricate the O-ring and seals and lip seals
before re-assembly.
• During re-assembly, refer to tables in
Section 14 of this IOM for recommended
tightening torques.
• Assembly drawing shows the standard
configuration for valve with O-ring seals but
can be considered as a reference for lip-seal
configuration also.
3-piece ball valve
Body-adapter sealing
10
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