Control systems Control valves
4
1 Stage Parabolic Balanced Trim (continued)
Kv (Cv US) values For conversion: Cv (UK) = Kv x 0.963
DN40 (1½")
DN50 (2")
DN65 (2½")
DN80 (3")
DN100 (4")
DN125 (5")
DN150 (6")
DN200 (8")
DN250 (10")
DN300 (12")
Trim
Equal percentage
25 (30)
36 (45)
63 (75)
100 (120)
160 (190)
245 (283)
370 (433)
580 (679)
700 (809)
1 000 (1 156)
Full port
25 (30)
36 (45)
63 (75)
100 (120)
160 (190)
260 (300)
390 (456)
640 (749)
780 (902)
1 100 (1 272)
Linear
Equal percentage
25 (33)
63 (85)
200 (231)
287 (336)
370 (433)
580 (670)
700 (809)
Reduction 1
25 (33)
63 (85)
200 (231)
287 (336)
550 (433)
640 (740)
780 (902)
Linear
4.1 105
Equal percentage
100 (116)
132 (154)
232 (271)
370 (428)
580 (670)
Reduction 2
100 (116)
132 (154)
232 (271)
550 (636)
640 (740)
Linear
Equal percentage
63 (73)
103 (120)
163 (191)
232 (268)
370 (428)
Reduction 3
63 (73)
103 (120)
163 (191)
232 (268)
550 (636)
Linear
Equal percentage
163 (188)
232 (268)
Reduction 4
163 (188)
232 (268)
Linear
Equal percentage
163 (188)
Reduction 5
163 (188)
Linear
28 (32)
50 (50)
85 (88)
117 (136)
180 (210)
260 (300)
390 (456)
640 (749)
780 (902)
1 100 (1 272)
Fast opening
TI-S24-59 CTLS Issue 7
Page 7 of 14
Balanced and Multi-stage Trim Options for Spira-trol TM Two-port Control Valves
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