D.
Valve
Disassembly-
WARNING – Use
extreme
caution whenremovingthe
flanged valve
from the pipeline to
prevent
personal
injury
thatmaybe
caused
by“cold
springing”
of the
p
i
p
i
n
g
.
CAUTION –
valves
shall be adequately supported prior to unfastening the studs and nuts that hold the valve
in line and secured with liftingstraps or
slings
to hold the weight of the valve.
D1.
Remove
the
flange
bolts and nuts and liftthe
valve
from the line for servicing. Note – care should be
taken to avoid scratching or damaging the
flange
gaskets. Damaged
gaskets
must be replaced prior to
r
einstallingin the line.
D2.
Safely
placethe
valve
on a clean,secure and stablework surface. Protect the
flange faces
when
handlin
g
to prevent scratching and damage.
D3. Match mark the body and body end to insure correct alignment when the
valve
is reassembled.
D4.
Remove
body cap. One body sealand seat should come out with the body
end
.
D5. Theball may be removed byfirst placing the
valve
in the
fully
closedposition. Use a liftingstrap and
lifting
device
for
safety
purposes when the weight of the ball dicta
t
es
CAUTION – Use extreme care in handling the ball to avoid damage.
D6.
Remove
the second seat and seal.
D7.
Remove
Stem
-
a.) 2”
valves
–
Remove
handle nut, handle, lock washer,
Belleville
washer, packing follower, packing protector,
stem packing, o-ring, packing protector and stem.
b.) 3 & 4
”
– Lose screw on handle and then r
emove handle, snap ring, travel stopper, gland bolt, stop housing,
housing bolt, packing gland, lock washer, Belleville follower, packing protector, stem packing, o-ring, thrust
washer and stem.
The stem must be removed from the inside of the body. Gently tap the top of the stem with a
non-met
allic
mallet. Thethrust washer should come out with the stem. Stem packing can now be removed. If a packing
pick is used to remove packing, care must be taken not to scratch any surface.
VisualInspection-
Clean and inspect all metal parts. It is not
necessary
to replace the ball and stem unless the seating surfaces
have been damaged byabrasion or corrosion. Flo-Tite strongly recommends that allseats,
seals
and packing
be replaced whenever a
valve
is disassembledfor reconditioning.
This
is the surest protection against subse-
quent
leakage
after reassembly. Replacementparts are sold in kit form.
Refer
to the metal tag attached to
t
h
e
side of the
valve
body to identifythe
specific sealing
materials used. Kitscan be obtained viathe localFlo-
Tite Distributor. Replacementparts should be purchased prior to
valve
disassembly. Required info
r
ma
tio
n
to purchase replacement parts include:
a. Linesize
b. Model
designa
tio
n
c.
Seat/seal
materials – seestamping on metal tag attached to the
valve
body.
Valve Reassembly
-
Note- the
valve
may be
reassembled
and
operated dry
when no
lubricants are allowed
in the
system;
how
ever,
a light
lubricant
on the ball and stem will aid in
assembly
or
reduce
initial operating torque.
Lubri
cantused must be compatiblewith the intended systemfluid.
