13
IOM-WKM-BALL-370D5
DISTRIBUTED VALVES
TC9186
around the seat circumference. Push lock pin fully through gap between ends of
nested lock ring. Remove from press (refer to illustration, Section IV-A, Step 14).
c. Grease seat gasket O-ring. Stretch seat gasket O-ring over shoulder of inner seat
ring.
d. Replace U-cup. DO NOT stretch. U-cup is designed to fit with minimum contact.
Stretching will make it too large.
3. Insert springs in closure and position seat ring in closure so that the three or more
drilled holes on the O.D. of outer seat ring are at 90° to the vertical centerline of
the stem and ball.
4. Seat ring assembly must be pressed into the closure recess. On larger valves, this
may be done by using ball as a press, as follows:
Note:
If your valve has the four (4) seat retainers in each seat, these should be used to pull
seat into closures which would eliminate steps a, b and c.
a. Lay plywood sheet over the entire exposed surface of seat rings.
b. Place slings around the ball and suspend the ball over seat rings.
c. Lower ball onto wood and carefully press seat rings into closure.
Caution:
Be sure pressure is applied evenly. Seat rings must be properly aligned or ball will
bind and valve will leak.
5. Remove slings from ball and block up, so end trunnions are accessible with clear-
ance for bearing plates.
a. On lower trunnion place lower thrust washer and spacer, if used. The chamber
on the inner diameter of the spacer must face the thrust washer.
b. Locate the bearing plates on the ball trunnions with lifting eyebolts installed.
D I S T R I B U T E D V A L V E S
Installation, Operation and Maintenance Manual
8
W-K-M 370D5
b.
Secure with lock ring and pin as follows: Push lock
pin inward through hole in outer set ring until it
protrudes slightly into lock ring groove. Start lock
ring into it's groove by abutting the pin and
working it into it's groove progressively around the
seat circumference. Push lock pin fully through gap
between ends of nested lock ring. Remove from
press (refer to illustration, Part IV-A, Step 14).
c.
Grease seat gasket O-Ring. Stretch seat gasket
O-Ring over shoulder of inner seat ring.
d.
Replace U-Cup.
DO NOT
stretch. U-Cup is designed
to fit with minimum contact. Stretching will make it
too large.
4. Insert springs in closure and position seat ring in
closure so that the three or more drilled holes on
the O.D. of outer seat ring are at 90° to the vertical
centerline of the stem and ball.
5. Seat ring assembly must be pressed into the closure
recess. On larger valves, this may be done by using
ball as a press, as follows:
NOTE: If your valve has the four (4) seat retainers in
each seat, these should be used to pull seat into
closures which would eliminate steps a, b and c.
a.
Lay plywood sheet over the entire exposed surface of
seat rings.
b.
Place slings around the ball and suspend the ball
over seat rings.
c.
Lower ball onto wood and carefully press seat rings
into closure.
CAUTION: Be sure pressure is applied evenly. Seat
rings must be properly aligned or ball will bind and
valve will leak.
6. Remove slings from ball and block up, so end trunnions
are accessible with clearance for bearing plates.
a.
On lower trunnion place lower thrust washer and
spacer, if used. The chamber on the inner diameter of
the spacer must face the thrust washer.
b.
locate the bearing plates on the ball trunnions with
lifting eyebolts installed.
7.
Using eyebolts in bearing plates with a spreader bar lift
ball into position over seat assembly in closure.
8.
Lower ball into seat rings while rotating bearing plates so
that pins fit into matching holes in closure. Remove
lifting eyebolts.
9.
Apply grease to the closure O-Ring and body O-Ring
groove. Place body O-Ring over shoulder on closure.
10 . Lift body over ball and set into position with studs
matching closure holes and ball.
11. Lower other closures over body studs with the
bearing plate pins seating into the matching
closure holes.
CAUTION: Be sure to lower closure evenly.
