Azbil Corporation Valve Body
Model VFR - FloWing Eccentric Rotary type Control Valves 2-3
2-2 : Disassembly
For the disassembly of the valve body section, dismantle the actuator observing the
disassembly instructions described in “Chapter 3 : Actuator” and then proceed as
follows:
(1) Remove the clamping-bolts from the packing ange.
(2) Remove the packing ange and packing follower.
(3) Pull out the valve stem together with the other gland parts (key, main bushing,
spring, packing ring, and packing). (For 10 in. and 12 in. valves, pull out the valve
stem alone.)
~Note
If the valve stem does not readily come out, pull it out using the following
procedure:
(a) Remove several pieces of packing.
(b) Prepare a pipe, a stud bolt, a nut and a washer as shown in Figure 2-3
and turn the nut so to pull the valve stem out. (When installing the cam
holder on the end of the valve stem, apply locking agent.)
(4) Remove the valve plug from the plain bearing.
(5) Pull the valve plug out from the downstream side.
(6) Remove the seat retainer by turning it counterclockwise with a seat ring remover-
clamper (a special tool available separately). For the seat ring remover-clamper,
see Figure 2-4.
(7) Remove the seat ring. Inspect all of the removed parts and replace defective ones,
if any, with new ones.
Valve stem
Pipe
M12 Stud bolt
Nut
Figure 2-3
W
T
D
Figure 2-4 Seat ring remover-clamper
(inches) A T D W
6
8
10
12
19.5
19.5
39.5
39.5
15
15
20
20
128
164
194
232
30
30
32
32
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