Fisher 655 - Page 5

Type 655 and 655R
5
Table 3. Effective Diaphragm Area
(1)
ACTUATOR
TRAVEL DOWN FROM UPPER CASING STOP, IN. (mm)
ACTUATOR
SIZE
0 1/8 (3) 3/16 (5) 1/4 (6) 3/8 (10) 7/16 (11) 1/2 (13) 9/16 (14) 3/4 (19) 7/8 (22)
SIZE
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
Cm
2
3A, 4A 10.2 66 9.6 62 9.5 61 9.4 61 9.2 59 9.1 59 8.9 57 8.7 56 - - - - - - - - - - - -
3B, 4B 23.5 152 21.6 139 21.1 136 20.8 134 20.5 132 20.3 131 20.1 130 19.8 128 18.1 117 16.0 103
32, 42 40.0 258 36.4 235 35.2 227 34.2 221 32.6 210 31.8 205 31.0 200 30.3 195 28.2 182 26.4 170
33, 43 63.0 406 58.0 374 56.8 366 55.5 358 53.5 345 52.7 340 52.0 335 51.2 330 49.3 318 47.6 307
34, 44 93.0 600 84.8 547 82.8 534 81.0 523 78.8 508 77.8 502 77.0 497 76.0 490 73.5 474 72.0 465
35, 45 134.0 865 129.2 834 127.2 821 125.4 809 122.2 788 120.5 777 119.0 768 117.6 759 114.1 736 112.0 723
36, 46 190.0 1230 181.5 1170 179.0 1150 177.0 1140 173.5 1120 172.3 1110 171.0 1100 169.8 1100 166.5 1070 163.5 1050
1. For the spring rates of a particular spring, see key 6 in the Parts List section.
Figure 4. Actuator/V alve Components
DV3742-B
DH4667-B
31A0223-B
B0816-1 / IL
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