Flowserve Valtek FlowTop V746 User Instructions page 17

to remove the packing (88) and the packing box ring (93).
12. Use a standard brass scraper or other suitable tool to
remove all old gasket material; then clean the gasket
surfaces.
Examine the valve trim and bonnet
NOTICE
components. If the nominal and ac-
tual values differ by more than 5% a control valve
overhaul may be required.
13. Check stressed surface areas for damage such as
scoring or deformities.
14. Use a standard brass scraper or other suitable tool
to clean all bolting. Check for corrosion or any other
damage.
Reassembly of the valve with a Bellows Seal
Bonnet Assembly:
15. Lubricate all bolt and screw threads and bearing sur-
faces (stem, plug, underside of the nuts) with a suit-
able, approved lubricant (See Section 15: Lubricants).
Never allow lubricants to come in
NOTICE
contact with the bonnet or sealing
surfaces.
16. Lower the plug (50) into a three jaw-chuck with soft
brackets and install a new lock bushing (52) into the
plug (Type A and B).
The cone of the lock bushing must
NOTICE
open to the top.
Reassembling Type A bellows:
Carefully lower the bonnet (5) onto the plug. Install a
new head gasket (59) and insert the bellows seal as-
sembly (6) from the top of the bonnet (5). Finger tight-
en the stem (51) clockwise onto the plug (50). Tighten
the stem (51) using a suitable torque wrench.
Reassembling Type B bellows:
Install the bellows seal assembly (51) clockwise onto
the plug (50). Tighten the stem (51) using a suitable
torque wrench.
Insert the bellows seal assembly (51) type B through
the underside of the bonnet (5), install a new profile
ring (60) and seal carrier (91) on top. Turn hex nut
Valtek FlowTop General Service Valve
60
5
52
Figure 12: Disassemble / Reassemble the valve with bellows seal assembly for
Item Part
1 Body
5 Bonnet
20 Seat ring
30 Seat retainer
40 Head
42 Plug screw
48 Plug gasket
50 Plug
51 Stem
Table 13: Valve parts with bellows seal
FCD VLENIM8610A4 11/18
104
91
106
51
50
type B design
Item Part Item Part
52 Lock bushing 91 Seal carrier
55 Profile ring 93 Packing box ring
56 Seat ret. gasket 104 Hex nut
58 Bonnet gasket 106 Stud bolt
59 Head gasket 108 Stud bolt
60 Profile ring 110 Hex nut
80 Packing follower 114 Hex nut
87 Upper stem guide 138 Belleville spring
88 Packing
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