11 | Baker Hughes
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B.
Place valve body (1) on flat surface so that the seat is down.
C.
Coat lower guide bushing (22) with recommended lubricant
and insert into the body.
Note: Groove in the guide bushing (22) must be towards
the body center. Refer to Figure 10 for correct assembly
sequence. If the shaft (19) is the previous design it may
have a circular grove, if so, install the retaining ring
(18).
Figure 10
D.
Coat the upper guide bushing (21) spacer tube (20) and the
shaft splines (plug side) with recommended lubricant.
E.
Insert the spacer tube (20) over the lubricated part of the
shaft.
When a recessed groove exists in the spacer tube
(20), this spacer tube (20) must be placed on the shaft
(19) so that the shaft shoulder or retaining ring fits
into the recessed groove on one end of the spacer
tube (20).
F.
Place upper guide bushing (21) on the shaft (19).
G.
Place plug (4) in body so it rests on the seat.
H.
Insert the shaft sub-assembly into the body (1) and engage
plug (4) and lower guide bushing (22).
Note: The shaft (19) should be inserted into the plug so
that when the plug is seated, the slot at the outer end of
the shaft is perpendicular to the flow through the valve.
In case of 35002 SB, separable bonnet version, follow the
operations described from N to U.
I.
Install the packing box ring (23), bevel side out, over the shaft
(19) and into the valve bonnet being sure that the hole in the
ring is aligned with the threaded port in the bonnet.
J.
Apply a suitable lubricant to the threads of the safety pin (16)
and screw into the body neck and tighten.
The Safety Pin is a safety device which must not
be replaced by a plug. Use only genuine supplied
safety pins. Pin must engage hole in packing box ring
(23). Test by manually pulling on the shaft to verify
engagement.
K.
Install packing (17) insuring that the skive cut of each piece
of packing is offset approximately 120° from that of the
adjacent piece of packing.
Note: Sizes 1" thru 3" (DN 25 through 80) use 7 pieces
of packing; sizes 4" thru 12" (DN 100 through 300) use
6 pieces of packing.
L.
Install packing follower (15) rounded, bevel side out.
M.
Proceed to Section 10.6 on seat ring alignment.
N through U apply to separable bonnet design only:
N.
If necessary, install the studs (103) in the bonnet (102).
O.
Install the stop ring (100).
P.
Place the gasket (101) in the groove of the bonnet. The old
gasket (101) must not be re-used.
Q.
Place the bonnet with the studs on the body and screw the
nuts (104).
R.
Tighten the nuts (104) according the table of Figure 11.
Valve Size
Torque lb.ft
Torque m.N
1" (DN 25)
22
30
1
1
⁄
2
" (DN 40)
2" (DN 50)
3" (DN 80)
55
75
4" (DN 100)
55
75
6" (DN 150)
107
145
Figure 11
Note: It is important to tighten the nuts step by step,
during the tightening the bonnet flange must keep the
shaft axis aligned.
S.
Install packing (17) insuring that the skive cut of each piece
of packing is offset approximately 120° from that of the
adjacent piece of packing.
Note: Sizes 1" through 3" (DN 25 through 80) use
7 pieces of packing; sizes 4" through 12" (DN 100
through 300) use 6 pieces of packing.
T.
Install packing follower (15) rounded, bevel side out.
U.
Proceed to Section 10.6 on seat ring alignment.
10.6 Seat Ring Alignment
Aligning the seat ring (2) and plug (4) is required whenever the
seat ring or plug have been replaced or disassembled. Proceed
as follows:
A.
Place valve on flat surface with retainer (3) and seat ring (2)
facing up.
Note: The casting marks (=) indicate the seat ring end
of the body.
B.
Remove the retainer ring (3) and the seat ring (2).
C.
Apply a thin coat of sealant to the seat ring shoulder that
engages the body and replace seat ring (2).
D.
Apply a small amount of thread lubricant to the seat ring
retainer threads and install seat ring retainer (3) and hand
tighten only.
Do not tighten the seat ring retainer to torque specifi-
cation at this time.
