Flowserve CPT Series Metal Characterized Seat Control Valves - Manual (Page 5)

09015-G Metal Characterized Seated Control Valves Installation, Operation and Maintenance Instructions 5
13. Insert the round port seat and seat back seal (used with “A”
or “G” filled metal seats only) in the cavity in the end plug.
14. Install the end plug into the body and tighten until the body
and end plug make metal-to-metal contact. The end plug may
project up to .009" beyond the surrounding serrated surface.
End plug must be fully tightened against machined step in
body. If in doubt, assemble end plug without seat and seal,
make a witness mark, then reassemble the full assembly.
TO REASSEMBLE 3"-4" FLANGED ONE-PIECE VALVES:
15. Place the thrust bearing on the stem.
16. Insert the stem and thrust bearing into the body through the
ball cavity. See instructions 22 through 27 for stem packing
and gland plate assembly.
17. Place the far characterized seat insert, seat (“A” or “G” filled
metal), or for Revision R1 and later valves only, one-piece
characterized seat, and seat back seal in the body cavity. The
one-piece characterized seat or seat insert has a “V” cut in it
for improved flow control and must be properly oriented to
function. To assure that proper alignment is accomplished,
Revision R0 valves have a locating pin provided in the body
cavity, and a groove in the seat insert. This valve seat insert
can only be assembled one way and must fit properly, not jam
on the pin. For Revision R1 and later valves, the one-piece
seat has a locating nib that aligns with a groove in the body
cavity. When seat back seals are used, be certain that they are
correctly located on the seat back face before installing the
ball and end plug. Damage may occur and leaks or high
operating torque may result if the seat back seals are not
located correctly.
18. With the valve in closed position (stem groove going across
pipeline), insert the ball into the body so that the stem slot
engages the tang on the stem.
19. Install the body seal. Be certain that the body seal rests
squarely on the sealing surface in the body.
CAUTION: If the body seal is installed on the end plug, it
will be damaged.
20. Insert the round port seat and seat back seal (used with “A”
or “G” filled metal seats only) in the cavity in the end plug.
21. Assemble the end plug into the body as far as it will go.
Secure with end plug retaining screws, tightening each one
firmly. The end plug screws only retain the end plug. Flange
bolt force is required to compress the body seal and seat the
end plug. Proper installation will allow not more than .010"
protrusion of the end plug beyond the valve body.
Upon reinstallation of the valve in the line, retighten the end
plug retaining screws after the flange bolts are fully torqued.
THE FOLLOWING INSTRUCTIONS ARE FOR ALL CPT 94 VALVES:
22. NOTE: Be certain that the stem seals are lubricated per
Section IV.D. prior to assembly.
Install the following parts over the stem and into the packing
chamber in this order (refer to packing assembly drawings
Figures 1 and 2):
a. For “T” Packing - Filler ring, 629 seal, lantern ring-T, three
Chevron packing rings (for 1 /
2
"-2" 94 three-piece and one-
piece valves only, one Chevron ring is of carbon filled
fluoropolymer material and black in color and must be
positioned as the top ring), follower-T.
b. For “G” Packing - Two graphite packing rings, lantern
ring-G, two graphite packing rings, follower-G.
23. Install gland plate over stem.
24. Valves with “T” and “G” packing both use twelve Belleville
washers. The arrangement of the washers is different for each
type of packing (refer to packing assembly drawings Figures 1
and 2):
a. For “T” Packing - Use three sets of two washers on each
bolt. Each set consists of two Bellevilles opposing each
other with their O.D.s touching.
b. For “G” Packing - Use three nested Bellevilles opposing
three nested Bellevilles on each bolt. The middle two will
have their O.D.s touching.
25. Lubricate the gland bolt threads with an anti-galling agent,
such as Christo-Lube MCG-111. Install gland bolt/Bellevilles
through the gland plate and thread them into the body. Tighten
the gland bolts per Section III.A. Be certain that the bolts do
not bind - this can result in improper packing loading.
CAUTION: Tightening the gland bolts can cause the stem to
be pushed into the ball cavity. The stem must either be
fixtured to prevent this, or be worked back into position
when assembling the ball and seats into the body.
26. Tighten the body bolts per Section I.C.7. ( 1 /
2
"-2" three-piece
valves only).
27. Add actuator and restore valve to line.
V. RECOMMENDED SPARES:
When ordering parts, please provide the part name and all the valve
code information found on the nameplate on the body: valve size,
style, materials, ends and “R” number (Revision Number).
Example: 1" CPT 94 66 AG SE G30 R0 Ball or
3" CPT 94 46 GZ150 G60 R0 Stem
Valves may also be marked with an additional “P”, “T”, “C”, or similar
number. These numbers designate non-standard products and must
be specified along with the valve code.
Example: 1" CPT 94 66 AG SE A30 P-2933 Ball or
1 /
2
" CPT 94 66 GZ300 G60 T-1340 Stem
Flow Control Division
Worcester Controls