Instruction manual – Fisher 655 User Manual
Page 5
655 and 655R Actuators
Instruction Manual
Form 1292
July 2007
5
Table 3. Effective Diaphragm Area
(1)
ACTUA-
TRAVEL DOWN FROM UPPER CASING STOP, mm (IN.)
ACTUA-
TOR
0
3 (0.125)
5 (0.1875)
6 (0.25)
10 (0.375)
11 (0.4375)
13 (0.5)
14 (0.5625)
19 (0.75)
22 (0.875)
TOR
SIZE
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
Cm
2
In.
2
3A, 4A
66
10.2
62
9.6
61
9.5
61
9.4
59
9.2
59
9.1
57
8.9
56
8.7
- - -
- - -
- - -
- - -
3B, 4B
152
23.5
139
21.6
136
21.1
134
20.8
132
20.5
131
20.3
130
20.1
128
19.8
117
18.1
103
16.0
32, 42
258
40.0
235
36.4
227
35.2
221
34.2
210
32.6
205
31.8
200
31.0
195
30.3
182
28.2
170
26.4
33, 43
406
63.0
374
58.0
366
56.8
358
55.5
345
53.5
340
52.7
335
52.0
330
51.2
318
49.3
307
47.6
34, 44
600
93.0
547
84.8
534
82.8
523
81.0
508
78.8
502
77.8
497
77.0
490
76.0
474
73.5
465
72.0
35, 45
865
134.0
834 129.2
821 127.2
809 125.4
788 122.2
777 120.5
768 119.0
759 117.6
736 114.1
723 112.0
36, 46
1230
190.0
1170 181.5
1150 179.0
1140 177.0
1120 173.5
1110 172.3
1100 171.0
1100 169.8
1070 166.5
1050 163.5
1. For the spring rates of a particular spring, see key 6 in the Parts List section.
Figure 3. Actuator/Valve Components
DV3742-B
DH4667-B
31A0223-B
B0816-1 / IL
PUSHĆDOWNĆTOĆCLOSE VALVE
PUSHĆDOWNĆTOĆOPEN VALVE
DIAPHRAGM PLATE
DOWN TRAVEL STOP
ACTUATOR STEM
ADJUSTING SCREW
TRAVEL INDICATOR
STEM HEX NUTS
VALVE STEM
YOKE LOCKNUT
SEAT RING
VALVE PLUG
VALVE PLUG
SEAT RING