Flowserve 94 Series - Manual (Page 3)

06957-L 3
Gland Bolt Torque (In.-Lbs.)
Valve Size “T” Packing “G” Packing
1 /
2
"- 3 /
4
" 40-45 90-110
1"-1 1 /
4
" 65-70 120-140
1 1 /
2
"-2" 85-95 210-230
3"-4" 175-200 270-295
6" 240-265 340-365
NOTE: After adjustments, packing creep will occur over several hours.
Bolt torque measured then will be less.
IV. REBUILDING
This manual contains exploded views of the valves covered by the
text. They have been included to aid in the rebuilding of the valves.
Please refer to them when following the written instructions.
a WARNING: BALL VALVES CAN TRAP PRESSURIZED FLUIDS IN
THE BALL CAVITY WHEN CLOSED.
Special handling and cleaning procedures are necessary for oxygen
and vacuum service valves. Refer to industry practices when
overhauling these units.
If the valve has been used to handle hazardous media, it must be
decontaminated before disassembly. It is recommended that the
following steps be taken for safe removal and disassembly:
- Relieve the line pressure. Operate the valve prior to attempting
removal from line.
- Place the valve in half-open position and flush the line to remove
any hazardous material from the valve body.
- 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 94 Series valve
containing all the necessary parts for standard valve rebuilding;
seats, seat back seals (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 ball, seats and body
seals, 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. If valve body is stainless steel, place a “6” after valve size in
repair kit ordering code.
Repair Kit Ordering Examples:
1" RK94 6PM R0 3" RK94 PT R0 2" 6 RK94 6PM R1
1" FZRK94 PM R1 3" FZRK94 RZ R0 2" RK94 AG 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 94 VALVES:
1. Place valve in open position. Remove three body bolts and
nuts and loosen fourth to swing the center section out from
between the pipe ends, or remove all four bolts to remove the
valve from the line; whichever is more convenient. FZ94
valves require spreading the pipe ends to clear the centering
rings (Note: Revision R3 FZ94 valves with “G” seats, and all
Revision R4 and later FZ94 valves do not have centering
rings).
2. Close the valve. Remove the seats, seat back seals (if any),
ball and body seals.
3. Remove the handle (if any), gland bolts, Bellevilles, gland
plate and follower(s) (1 or 2 pcs.) 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.
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 seals (if any).
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 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.
Flow Control Division
Worcester Controls