Flowserve 82 Series Flanged One-Piece - Manual (Page 4)

4 18510-P
Flow Control Division
Worcester Controls
step in body. If in doubt, assemble end plug without seat and
seal, make a witness mark, and reassemble the full assembly.
NOTE: For valves with coated stainless steel “S” gasket body seal, the
wide flange is placed facing the ball (see view A-A on page 5). Be
sure the body seal is well lubricated.
2"-10" Two-piece Valves:
Insert new seat in body. Make sure seat rests firmly on back
surface of recess.
g. Reassemble stem assembly by putting new thrust bearing
onto stem and inserting through body cavity into stem hole.
For 2
1 /
2
"-6" sizes the thrust bearing can be distinguished from
the stem seals by the darker color of the 25% filled
fluoropolymer used in the thrust bearing. For the 2", 8" and
10" size valves the stem seals and thrust bearing are the same
size and color, and are interchangeable. Put metal stem
washer (2
1 /
2
" and larger only), new stem seal(s), and follower
onto stem. Fire-rated valves use one or two metal stem
washers (install the same quantity that was removed), a
graphite stem seal, which is metallic silver gray and thicker
than the thrust bearing, and a Belleville washer (2"-6" only)
installed concave side up above follower.
NOTE: FOR 2"-6" ACTUATED VALVES HAVING A GRAPHITE STEM
SEAL AND BELLEVILLE WASHER, A SECOND BELLEVILLE WASHER
IS USED. THE BELLEVILLES SHOULD BE INSTALLED WITH THE
LARGER DIAMETER SIDES TOUCHING EACH OTHER. THE STEM
SPACER IS NOT USED.
For valves with V51 high cycle stem packing option, the
thrust bearing and stem seals are the same size and color,
and they are interchangeable. A stem seal protector of PEEK
material and tan in color is also used and installed over the
stem seals.
Two Belleville washers are used with this V51 option and they
are installed over the follower with the larger diameter sides
touching each other. The stem spacer is not used.
On anti-static fire-rated valves (AF82 & AF83) a black, carbon-
filled fluoropolymer thrust bearing must be used for proper
grounding of stem to body.
h. Add stop, pointing in correct direction, or valve stem spacer
(for 2"-6" actuated valves) and stem nut. Using a wrench to
prevent the stem from turning, tighten the stem nut until stem
packing is fully compressed or Belleville(s), if used, are fully
flattened. Then back off
1 /
6
turn. Excessive tightening causes
higher torque and shorter stem seal life.
i. With valve in closed position (stop plate pointer and/or stem
groove going across pipeline), carefully insert ball into body
so that stem slot engages tang on stem.
j. Install and make sure body seal rests squarely in seal surface
of body. Insert new seat in cavity of end connector.
CAUTION: If the body seal is installed on the end connector, it will
be damaged.
k. Carefully place the end connector into the body using two or
three body studs to align the mid-flange holes. When
correctly located, strike the end connector with a mallet to
push down the end connector further into the body. Tighten
all body nuts to the following torques:
l. Replace handle assembly and tighten hex head screw (manual
valves only).
Pressure checking of valve is desirable if practical.
6. When ordering parts, please provide the part name and the
following information as found on the valve nameplate:
a. Valve Size and Style and Revision Number
Example:
3" - 82 66 T 150 - R1 Stem
6" - AF82 46 RZ 150 - R1 Ball
OR
b. Valve Size, Style and 5 Character Code, known as a “P”
Number, “T” Number, “C” Number, or similar number, the
designation for a non-standard product.
Example: 6" 8366 T 300 P 2577 Ball
The terminology shown in the part listings on the following pages
are standard. Please use them when ordering parts.
Stainless Steel Studs
Valve Size 82-150# Class 83-300# Class
2" 33 Ft.-Lbs. 170 Ft.-Lbs.
2 1 /
2
" 82 Ft.-Lbs. 170 Ft.-Lbs.
3" 33 Ft.-Lbs. 170 Ft.-Lbs.
4" 82 Ft.-Lbs. 170 Ft.-Lbs.
6" 170 Ft.-Lbs. 214 Ft.-Lbs.
8" 170 Ft.-Lbs. 214 Ft.-Lbs.
10" 334 Ft.-Lbs. 521 Ft.-Lbs.
Carbon Steel Studs
Valve Size 82-150# Class 83-300# Class
2" 87 Ft.-Lbs. 178 Ft.-Lbs.
2 1 /
2
" 87 Ft.-Lbs. 178 Ft.-Lbs.
3" 87 Ft.-Lbs. 178 Ft.-Lbs.
4" 87 Ft.-Lbs. 178 Ft.-Lbs.
6" 178 Ft.-Lbs. 253 Ft.-Lbs.
8" 178 Ft.-Lbs. 253 Ft.-Lbs.
10" 439 Ft.-Lbs. 684 Ft.-Lbs.