Data Sheet

A31A Cryogenic Valve
Product Bulletin
21.1:Cryogenic-Rotary
October 2010
19
Table 14. Fisher A31A Cryogenic-Valve CL300, Reverse Flow, NPS 20 and 24
Coefficients
Valve
Size,
NPS
Valve Rotation, Degrees
10 20 30 40 50 60 70 80 90
C
v
20
286 714 1480 2520 3910 5620 7240 8480 9530
K
v
247 618 1280 2180 3382 4861 6263 7335 8243
F
d
0.090 0.17 0.26 0.34 0.42 0.49 0.57 0.64 0.70
F
L
0.78 0.81 0.81 0.79 0.75 0.69 0.62 0.56 0.52
X
T
0.51 0.55 0.55 0.53 0.47 0.40 0.33 0.26 0.23
C
v
24
375 938 1940 3320 5130 7380 9510 11,140 12,500
K
v
324 811 1678 2872 4437 6384 8226 9636 10,821
F
d
0.090 0.17 0.26 0.34 0.42 0.49 0.57 0.64 0.70
F
L
0.78 0.81 0.81 0.79 0.75 0.69 0.62 0.56 0.52
X
T
0.51 0.55 0.55 0.53 0.47 0.40 0.33 0.26 0.23