3
KEYSTONE
SERIES 60 BUTTERFLY VALVES
INSTALLATION AND OPERATION MANUAL
NOTES
• The valve can be installed in the pipe-line either with
or without the actuator mounted on top of the valve.
Make sure to turn the disc slowly in the event there
is a mismatch causing the disc to touch the adjacent
piping.
• It is the responsibility of the valve user and not the
valve manufacturer to ensure that the pipeline
system has been built professionally and the valve
has been properly installed.
• Adjacent piping must be positioned so that minimal
piping stresses are transmitted to the valve flanges
during or after installation.
• Handling and lifting of the valves during installation
MUST be performed following the same instructions
described in previous section ‘1.2 Handling’.
IMPORTANT
Mating flange faces should be in good condition
and free of dirt and/or inclusions and pipe insides
should be well cleaned.
3.3.1 Existing system (see Figure 2)
1. Check whether the flange distance meets
the valve face-to-face dimensions. Spread
the flanges with adequate tooling for easy
insertion of the valve.
2. In case of a wafer valve, insert some flange
bolts in the pipe flanges, to help hold the
valve after insertion.
3. Close the valve so that the disc edge is at
least 10 mm (⅜”) within the body.
4. Insert the valve between the flanges. Center
the valve body, and insert all flange bolts.
Tighten the flange bolts hand tight.
5. Slowly open the valve completely. (The disc
is in line with parallel flats or keyway in shaft
head. Keyway points towards disc edge.)
6. Maintain the valve flange alignment while
gradually removing the flange spreaders,
and tighten the flange bolts hand tight.
7. Slowly close and open the valve to check for
adequate disc clearance.
8. Cross-tighten all bolting to the proper torque.
Do not over tighten.
3.3.2 New system (see Figure 2)
1. With the disc in the near closed position,
center each mating flange with the valve
body. Fix the body with some flange bolts
and tighten the bolts.
2. Use the flange-valve-flange assembly for
fit-up and centering to the pipe.
3. Tack weld the flanges to the pipe.
4. Remove the bolting and remove the valve
from between the flanges.
IMPORTANT
Do not finish-weld the flanges to the pipe with the
valve bolted between the flanges as this will result
in serious heat damage to the seat.
3.4 Valve verification
Check the operation of the valve by operating it
to ‘full open’ and ‘full close’. To verify the valve
operation, the disc position indicator on the
actuator or the handle should rotate between
the ‘full open’ and ‘full close’ indicators on the
actuator or throttle plate. For normal installation
the valve disc travels clockwise to close.
5. Finish-weld the flanges to the pipe and
allow the flanges to cool completely.
6. Install the valve now according to the
procedure for installing in existing systems.
