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KTM VIRGO SERIES N TRUNNION MOUNTED BALL VALVES
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
3 INSTALLATION
WARNING
• To prevent personal injury or property
damage resulting from the bursting of
pressure retaining parts, be certain the
service conditions do not exceed the limits
given on name plate / tag plate of valve.
• Personal injury could result from packing
leakage. The valve packing was tightened
before shipment however; the packing might
require some readjustment to meet specific
service conditions.
• Check with your process or safety engineer
for any additional measures that must be
taken to protect against process media.
• Before valve installation, ensure that the
pipeline is free from dirt, debris, scale, weld-
slag etc. to prevent damage to the internal
trim parts and seals of the valve.
• Ensure that the valve end protectors are
removed and the valve ends and bore are
cleaned before installation.
• The mounting stand attached to the body
to adapter joint shall not be removed while
installing the valve on the pipeline (refer
Figure 6).
FIGURE 6
Mounting stand
attached to body flange
WARNING
Do not remove while
installing the valve
FIGURE 8
Support from overhead
• If mounting Stand or Support stand of valve is
provided on end flange they shall be removed
before installation on the pipeline (refer
Figure 7).
• Mounting/support stand is only for handling
and transportation and not for carrying piping
loads. Hence Emerson recommends to give
supports to the pipeline appropriately and
shall not exceed following recommendations.
- For sizes, up to DN 100 (NPS 4), support to
be provided at a distance of '2D' to '3D' from
both valve ends
- For sizes, DN 150 (NPS 6) and higher,
support to be provided at distance 'D' from
both valve ends, where 'D' is the nominal
diameter of pipeline.
• For removing mounting/support stand from
valve assembly, lift the valve above ground
level by using appropriate material handling/
lifting equipment. Refer handling section of
this IOM. Loosen and remove the nuts from
respective mounting stand bolts/studs and
remove the stands. Fasten the nuts and bolts/
studs only to the mounting stand again and
store the entire set appropriately to reuse
whenever required for maintenance, storage
etc.
FIGURE 7
Foot support
(ground support)
Mounting stand
attached to end flange
Remove while
installing the valve
Foot support
(ground support)
• To reinstall the mounting/support stand
from valve, position the valve above ground
level by using appropriate material handling/
lifting equipment. Refer handling section of
this IOM. Loosen and remove the nuts and
bolts/studs from mounting stand set. Position
the stand aligning its holes with valve flange
holes and retighten the nuts with bolts/studs
as shown in Figure 7.
• Examples of valve support configurations are
shown in Figure 8.
• The valve should preferably be in fully open
condition during installation. Exception being
the 'fail close' valves.
• Never install the Valve with the Actuator
upside down on the pipeline, refer Figure 9.
3
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