Worcester controls – Flowserve CPT Series Metal Characterized Seat Control Valves User Manual
Page 3
09015-G
Metal Characterized Seated Control Valves Installation, Operation and Maintenance Instructions
3
•
All persons involved in the removal and disassembly of the valve
should wear the proper protective clothing such as a face shield,
gloves, apron, etc.
A. A standard repair kit can be ordered for the CPT 94 Series valve
containing all the necessary parts for standard valve rebuilding;
seats, seat back seal(s) (used with “A” and “G” filled metal seats
only), body seals, split thrust bearing, split ring, all non-metallic
stem packing parts, and Belleville washers. To order, specify the
valve size and series, the material of the seats and body seals, the
characterized seat configuration, and the “R” number (Revision
Number) or for non-standard valve, the “P” number, “T” number,
“C” number, or similar number. This information is found on the
nameplate on the valve body.
Repair Kit Ordering Examples:
1" CPT RK94 PM A06 R0
1" CPT RK94 GG G30 R0
3" CPT RK94 PT G60 R0
3" CPT RK94 RZ A30 R0
2" CPT RK94 AG G60 T0726
CAUTION: If the seats and seals installed differ from those
removed, the valve nameplate MUST be replaced or re-marked
to indicate the altered materials and ratings or valve tagged to
so indicate.
B. TO
DISASSEMBLE
1
/
2
"-2" THREE-PIECE VALVES:
1. Remove actuator and place valve in open position. Remove all
four body bolts and nuts and remove center section from
between the pipe ends by separating the pipe ends from the
body by at least
1
/
8
" to allow locating diameter on the back of
the metal characterized seat (inserted into oversized pipe end
bore) to clear pipe end flange.
2. Close the valve. Remove the seats, seat back seal(s), ball and
body seals.
3. Remove the gland bolts, Bellevilles, gland plate and follower
from the top of the valve.
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
1
/
2
"-2" FLANGED ONE-PIECE VALVES:
5. Place valve in closed position, remove actuator from valve
and remove valve from line.
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, seats and seat back seal(s).
8. Remove the gland bolts, Belleville washers, gland plate and
follower from the top of the valve.
9. 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.
Flow Control Division
Worcester Controls
VALVE SIZE
GLAND BOLT TORQUE (In.-Lbs.)
GLAND BOLT TORQUE (In.-Lbs.)
“T” PACKING
“G” PACKING
1
/
2
"
3
/
4
"
1"
1
1
/
2
"
2"
3"-4"
40-45
40-45
65-70
85-95
85-95
175-200
90-110
90-110
120-140
210-230
210-230
270-295
NOTE: After
adjustments, packing
creep will occur over
several hours. Bolt
torque measured then
will be less.