Valtek FlowTop General Service Valve FCD VLENIM8610A4 11/18
17
flowserve.com
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.
NOTICE
Examine the valve trim and bonnet
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).
NOTICE
Never allow lubricants to come in
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).
NOTICE
The cone of the lock bushing must
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
104
91
60
106
5
52
51
50
Figure 12: Disassemble / Reassemble the valve with bellows seal assembly for
type B design
Item Part
Item Part
Item Part
1
Body
52 Lock bushing
91 Seal carrier
5
Bonnet
55 Profile ring
93 Packing box ring
20 Seat ring
56 Seat ret. gasket
104 Hex nut
30 Seat retainer
58 Bonnet gasket
106 Stud bolt
40 Head
59 Head gasket
108 Stud bolt
42 Plug screw
60 Profile ring
110 Hex nut
48 Plug gasket
80 Packing follower
114 Hex nut
50 Plug
87 Upper stem guide
138 Belleville spring
51 Stem
88 Packing
Table 13: Valve parts with bellows seal
