Fisher control valve available class rating
This table present class rating of each particular model of Fisher control valve
Butterfly
|
V150
|
V200
|
V300
|
CV500,V500
|
V250,V260
|
E,YD,YS
|
GX
|
HP,EH
| |
ANSI 150
|
X
|
X
|
X
|
X
|
X
|
X
|
X
| ||
ANSI 300
|
X
|
X
|
X
|
X
|
X
|
X
|
X
| ||
ANSI 600
|
X
|
XXX
|
X
|
X
|
X
| ||||
ANSI 900
|
X
|
XX
|
XX
|
X
| |||||
ANSI 1500
|
XX
|
X
| |||||||
ANSI 2500
|
X
| ||||||||
ANSI 4500
|
X
|
Notes:
XX, it will have class 900 pressure boundary rating with class 600 pressure differential rating for the trim.
XXX , it will have class 600 pressure boundary rating with class 300 pressure differential rating for the trim.
See valve model:
Travel range limits
To prevent poor installed gain characteristics into the process control system, the calculated of Cv should fall between the following travel ranges.
- Butterfly valve 25% to 45 %
- Segmented ball valves 20% to 60%
- Plug style valve 20% to 70%
- Ball valve 20% to 70%
- Sliding stem valve 15% to 85%
Cont...
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