Flowserve CL94 Series Three-Piece Chlorine Ball Valve 1/2-2 - Manual (Page 3)

06959-G 3
4. Remove the stem and packing from the valve:
a. Push the stem down into the body cavity.
b. Remove the split ring and split thrust bearing from the
recessed diameter above the stem tang.
c. Remove the stem from the top of the body. This may
require considerable force. The flats on the stem can be
clamped in a vise or other fixture to aid in removal. Avoid
damaging the stem flats. The packing will be removed
with the stem by the shoulder on the end of the stem.
CAUTION: Use care to avoid scratching the surface of
the stem and packing chamber.
d. Remove the packing from the stem.
TO DISASSEMBLE ¹₂"–2" FLANGED ONE-PIECE CL94 VALVES:
5. Place valve in closed position.
6. Unscrew end plug and remove. If required, end plug
disassembly tools are available from your supplier or from
Flowserve Corporation.
7. Remove body seal, ball and seats.
8. Remove the handle (if any), gland bolts, Belleville washers,
gland plate, and follower(s) (1 or 2 pieces) from the top of
the valve.
9. Remove the stem and packing from valve.
a. Push the stem down into the body cavity.
b. Remove the split ring and split thrust bearing from the
recessed diameter above the stem tang.
c. Remove the stem from the top of the body. This may
require considerable force. The flats on the stem can be
clamped in a vise or other fixture to aid in removal. Avoid
damaging the stem flats. The packing will be removed
with the stem by the shoulder on the end of the stem.
CAUTION: Use care to avoid scratching the surface of
the stem and packing chamber.
d. Remove the packing from the stem.
TO DISASSEMBLE 3"–4" FLANGED ONE-PIECE CL94 VALVES:
10. Place valve in closed position. Remove end plug retaining
screws.
11. Remove end plug. If necessary, drive end plug from valve,
using wooden drift applied to face of ball. Be certain the ball
is fully closed.
12. Remove body seal, ball and seats.
13. Remove the handle assembly, spacer, and stop (if any), gland
bolts, Belleville washers, gland plate, and follower(s) (1 or 2
pieces) from the top of the valve.
14. Push the stem down into the body cavity and remove.
15. Remove the thrust bearing and stem packing from the body.
CAUTION: Use care to avoid scratching the surface of the
stem and packing chamber.
C. VISUAL INSPECTION:
1. The ball and surfaces against which the seats and seals are
installed should be undamaged, clean and free of pit marks
and scratches. Light marring from the action of the ball
against the seats is normal and will not affect the operation of
the valve. Flaws that can be seen, but barely detected with
fingertips, are acceptable.
2. The stem and body surfaces that the stem seals and thrust
bearing contact must be undamaged, clean and free of pit
marks and scratches.
D. REASSEMBLY:
NOTE: It is recommended that the valve be installed with the ball
relief hole upstream to ensure that cavity relief is upstream as
suggested in Chlorine Institute Pamphlet 6. An arrow pointing
downstream is stamped on the body or on a metal tag welded to
the body.
Clean all sealing surfaces of the valve including the ball.
Lightly lubricate the ball, seats, body seal(s), split thrust bearing
and split ring or one-piece thrust bearing and stem seals with a
PTFE-based lubricant such as Fluorolube S-30 or equivalent.
TO REASSEMBLE ¹₂"–2" THREE-PIECE CL94 VALVES:
1. Insert the stem down through the bonnet and into the body.
2. Place the split thrust bearing in the recessed diameter above
the stem tang. Place the split ring in the same recessed
diameter, under the split thrust bearing (refer to exploded
view).
3. Pull the stem up so that the split thrust bearing and split ring
are drawn into the stem hole recess in the ball cavity. See
instructions 21 through 26 for stem packing and gland plate
assembly.
4. With the valve in the closed position (stem flats going across
pipeline), replace the ball and one-piece seat/body seals. Open
the ball.
5. Place the center section between the pipe ends being careful
not to scratch any sealing surfaces. Replace the four body
bolts and nuts. Tighten finger-tight.
Flow Control Division
Worcester Controls