06957-L
5
11. Install the body seal. Be certain that the body seal rests
squarely on the sealing surface in the body. For “S” gaskets,
see cautions I.D.1 - I.D.5.
12. Insert the seat and seat back seal (if used) in the cavity in the
end plug.
13. 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"-6" FLANGED ONE-PIECE VALVES:
14. Place the thrust bearing on the stem.
15. Insert the stem and thrust bearing into the body through the
ball cavity. See instructions 21 through 26 for stem packing
and gland plate assembly.
16. Place one of the seats and seat back seal (used with “A” or
“G” seats only) in the body. If 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.
17. 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.
18. 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.
19. Insert the seat and seat back seal (used with “A” or “G” filled
metal seats only) in the cavity in the end plug.
20. 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 94 VALVES:
21.
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, follower-G or one-
piece follower-T.
b. For “G” Packing - Two graphite packing rings, lantern
ring-G, two graphite packing rings, two followers-G or
one-piece follower-G.
22. Install gland plate over stem.
23. 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.
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.
24. 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.
25. Tighten the body bolts per Section I.C.6. (
1
/
2
"-2" three-piece
valves only).
26. Add handle (if any) and tighten the handle set screws.
For 3"-6" flanged one-piece valves add stop, spacer and
handle assembly (if used) and tighten handle retaining bolt.
Note: The spacer is to be used only if one was removed with
the handle assembly and stop.
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" 94 66 RV SE R0 Ball or 3" 94 46 GZ150 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" 94 66 RV SE P-2933 Ball or
1
/
2
" 94 66 GZ300 T-1340 Stem
Flow Control Division
Worcester Controls
Visit www.boighill.com to request a quote.
Visit www.boighill.com to request a quote.
