Valtek FlowTop General Service Valve FCD VLENIM8610A4 11/18
16
4. Remove the upper stem guide (87).
5. Place the Ring Nut Tool clockwise (See Section 16:
Special Tools) on the stem (51) and turn slowly.
WARNING
Crushing hazard ! Lifting
the bonnet and plug from
the control valve involves personal physical risk by
falling parts.
Please exercise caution.
6. Remove the bonnet gasket (58) and seat retainer gas-
ket (56).
7. Remove the seat retainer (30), seat ring (20) and pro-
file ring (55).
8. Turn the bonnet nuts (110) counter clockwise to loosen.
9. Remove the head (40) and upper bonnet gasket (59).
NOTICE
There are two different bellows seal
designs.
Type
Size
Twist lock between
plug and stem
Connection between
bellows and bonnet
A
15 - 50 1/2“ - 2“
Lock bushing
Clamped
B
65 - 150 3“ - 6“
Lock pushing
Screwed
Table 12: Bellows seal bonnet types
10. Disassembling each type of Bellows Seal Assembly:
Type A
Bellows Seal Assembly:
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.
Type B
Bellows Seal Assembly:
Turn the hex nut (104) from the bellows seal assembly
(51) counter clockwise to loosen, remove the seal car-
rier (91) and profile ring (60) then move the bellows
seal assembly down and out.
NOTICE
The bolting between plug and stem
are secured against twisting. Type A
and B bellows 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.
11. Use the Packing Driver Tool (See Section 16: Special Tools)
80
138
88
87
93
48
42
40
110
59
51
59
106
5
114
52
50
58
56
30
20
55
108
1
Figure 11: Disassemble / Reassemble the valve with bellows seal assembly
for type A designs (Valve parts see Table 13, Page 17)
