Control valves

Control valves

1 stage parabolic balanced trim (continued)

Kv (Cv US) values

For conversion: Cv (UK) = Kv x 0.963

Trim

DN40

DN50

DN65

DN80

DN100 DN125 DN150

DN200

DN250 DN300

Equal

percentage

Full port

Linear

25

(30)

36

(45)

63

(75)

100

(120)

160

(190)

245

(283)

370

(433)

580

(679)

700

(809)

1 000

(1156)

25

(30)

36

(45)

63

(75)

100

(120)

160

(190)

260

(300)

390

(456)

640

(749)

780

(902)

1100

(1272)

Equal

percentage

Reduction 1

Linear

25

(33)

36

(48)

63

(85)

100

(130)

200

(231)

287

(336)

370

(433)

580

(670)

700

(809)

25

(33)

36

(48)

63

(85)

100

(130)

200

(231)

287

(336)

550

(433)

640

(740)

780

(902)

Equal

percentage

Reduction 2

Linear

25

(36)

36

(50)

63

(90)

100

(116)

132

(154)

232

(271)

370

(428)

580

(670)

25

(36)

36

(50)

63

(90)

100

(116)

132

(154)

232

(271)

550

(636)

640

(740)

Equal

percentage

Reduction 3

Linear

25

(38)

36

(53)

63

(73)

103

(120)

163

(191)

232

(268)

370

(428)

25

(38)

36

(53)

63

(73)

103

(120)

163

(191)

232

(268)

550

(636)

Equal

percentage

Reduction 4

Linear

163

(188)

232

(268)

163

(188)

232

(268)

Equal

percentage

Reduction 5

Linear

163

(188)

163

(188)

Fast opening

28

(32)

50

(50)

85

(88)

117

(136)

180

(210)

260

(300)

390

(456)

640

(749)

780

(902)

1100

(1272)

TI-S24-59 CH Issue 4

Page 3 of 9

Balanced and Multi-stage Trim Options for Spira-trol

TM

Two-port Control Valves

4.1.62