EB 3007 EN
9-3
Servicing
Type 42-25
Type 42-20
Type 2422 Valve, balanced by a bellows
(DN 15 to 250)
25
+
_
P
1
P
2
1
2
3
4
5
17
11
12
13
15
20
16
18
19
22
14
23
20
24
26
57
+
_
16
20
15
23
13
22
14
18
19
20
11
Type 2425 Actuator
Type 2420 Actuator
Fig. 9-1:
Functional diagram for regulators, DN 15 to 250 with balancing bellows
1 Valve body
2 Seat
3 Plug
4 Plug stem
5 Balancing bellows
5.1 Balancing diaphragm
(DN 65 to 250)
11 Coupling nut
12 Diaphragm stem
13 Operating diaphragm
14 Bottom diaphragm
case (valve on top)
15 Nuts and bolts
16 Set point springs
17 Set point adjuster
18 Nut
19 Diaphragm plate
20 Control line
22 Diaphragm stem
23 Top diaphragm case
(valve on top)
24 Outer spring plate
25 Axial needle bearing
with washer
26 Inner spring plate
57 Dowel pin
Содержание 42-20
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