Flowserve Valtek FlowTop V750 User Instructions page 18

Valtek FlowTop
Standard and Extension Bonnet design
with a pressure balanced trim - disas-
sembly instructions
1. Remove the sleeve (30) from the plug assembly (50).
2. Remove the plug assembly (50) from the bonnet (40).
3. Remove the backing ring (66) and O-ring (65) from
the plug (50).
NOTICE
cial tools.
4. To disassemble the packing assembly, switch to the
relevant description (see Page 19 - 20).
5. Reassemble the pressure balanced plug with new backup
rings (66) and a new O-ring (65).
Figure 12: Disassemble / Reassemble the bonnet
Item Part
30 Sleeve
40 Bonnet
50 Plug
51 Stem
18
FCD VLEEIM1485-04 (EN/A4) November 2022
The disassembly and reassembly of the
plug and stem is only possible with spe-
Packing
40
66
65
66
51
52
50
56
30
Item Part
52 Lock bushing
56 Seat retainer gasket
65 O-ring
66 Backup ring
Table 14: Bonnet parts
Bellows Seal Bonnet design NPS 1/2 - 2
- disassembly instructions
1. To disassemble the packing assembly, switch to the
relevant description (see Page 19 - 20).
2. Turn the hex nuts (110) counter clockwise to loosen.
3. Remove the head (40) and upper head gasket (59).
4. Lower the plug (50) into a three jaw-chuck with soft
brackets and turn the plug from the stem and bonnet
(51 / 5) counter clockwise to loosen then move the
bellows seal assembly up and out then also remove
the lower head gasket (59).
The bolting between plug and stem
NOTICE
are secured against twisting. The bel-
lows seal assemblies are secured with a lock bushing
(52). The lock bushing (52) usually remains in the plug
(50) and can be reused. If the plug (50) is damaged and
replaced, a new lock bushing (52) must be used.
Figure 13: Disassemble / Reassemble the bonnet
Item Part
5 Bonnet
40 Head
42 Plug screw
48 Plug gasket
50 Plug
Table 15: Bonnet parts
Packing
110
40
42
48
59
51
59
106
5
52
50
Item Part
51 Stem
52 Lock bushing
59 Head gasket
106 Stud bolt
110 Hex nut