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B2263/IL
the final bolting torque. Repeat this procedure
several times increasing the torque value each time
by a fourth of the final desired torque. When the final
torque value has been applied, tighten each flange
bolt again to allow for gasket compression.
For Single Flange Valves:
1. Position the valve between the flanges. Be sure
to leave enough room for the flange gaskets; then
install the lower flange bolts.
2. Install the gaskets and align the valve and the
gaskets.
3. Install the remaining bolts.
4. Tighten the flange bolts in an alternating
criss-cross fashion to a torque value of one-fourth of
the final bolting torque. Repeat this procedure
several times increasing the torque value each time
by a fourth of the final desired torque. When the final
torque value has been applied, tighten each flange
bolt again to allow for gasket compression.
All manuals and user guides at all-guides.com
Figure 3. Proper Installation Procedure
Thrust Washers
Two thrust washers are used in valve sizes 10-inch
and larger (Class 150), 8-inch and larger (Class
300), 8-inch and larger (Class 600). The thrust
washers are located at the upper and lower bearing
areas of the valve. Thrust washers must be installed
before the disc is installed in the valve body.
Packing Adjustment and Shaft Bonding
WARNING
Personal injury could result from
packing leakage. 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.
1. For PTFE or graphite packing: Tighten
standard packing follower nuts only enough to
A11 Valve
7
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