Flowserve Valtek FlowTop V746 User Instructions page 14

NOTICE
the pressure balanced plug, the retainer may stick to
the bonnet then become detached while lifting the plug
and stem out of the valve. Secure the seat retainer as
you remove the plug and stem.
7. Remove the bonnet gasket (58) and seat retainer gas-
ket (56).
8. Remove the seat retainer (30), seat ring (20) and pro-
file ring (55).
9. Remove the plug assembly (50) from the bonnet (40).
10. Use the Packing Driver Tool (See Section 16: Special
Tools) to remove the packing box ring (93), packing
(88) and the upper guiding (87) (Details see Parts List
- Packing Details).
11. Use a standard brass scraper or other suitable tool to
remove all old gasket material; then clean the gasket
surfaces.
NOTICE
tual values differ by more than 5% a control valve
overhaul may be required (See Point 8, Page 9).
12. Check stressed surface areas for damage such as
scoring and deformities.
13. Use a standard brass scraper or other suitable tool to
clean bolting. Check for corrosion or any other damage.
Reassembly instructions of the valve body
assembly.
14. Lubricate all bolt and screw threads and bearing sur-
faces (stem, underside of the nuts) with a suitable, ap-
proved lubricant (See Section 15: Lubricants).
NOTICE
15. Install a new profile ring (55) and seat ring (20).
16. Lower the seat retainer (30) into the body and place it
on top of the seat ring (See Figure 9).
17. Lower the plug assembly (50) into the body with the
plug touching the seat ring surface.
14
Exercise care with a pressure bal-
anced plug design. While removing
Examine the valve trim and bonnet
components. If the nominal and ac-
Never allow lubricants to come in contact
with the bonnet or sealing surfaces.
Valtek FlowTop General Service Valve
Figure 9: Disassemble / Reassemble the valve
Item Part
1 Body
20 Seat ring
Seat retainer
30
Sleeve
(Figure 10)
40 Bonnet
50 Plug
51 Stem
52 Lock bushing
55 Profile ring
56 Seat retainer gasket
FCD VLENIM8610A4 11/18
80
138
87
88
93
114
40
58
51
52
50
56
30
20
55
108
1
Item Part
58 Bonnet gasket
65 O-ring
(Figure 10)
66 Backup ring
80 Packing follower
87 Upper guiding
88 Packing
93 Packing box ring
108 Stud bolt
114 Hex nut
138 Belleville spring
Table 11: Valve parts
(Figure 10)