44
Control systems Control valves
Kv flowrate coefficients and travel
Nominal size
DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80DN100DN125DN150DN200
Travel
mm 20
20
20
20
20
20
30
30
30
50
50
50
Mixing service
Kv
4
6
10
17
25
35
62 100 130 195 310 450
Diverting service
Kv
-
-
10
17
25
35
62 100 130 195 310 450
Kv flowrate coefficients are shown in metric units (Kv = water flowrate in m 3 /h with 1 bar differential pressure). For conversion:
Cv (UK) = Kv x 0.963 Cv (US) = Kv x 1.156
Dimensions and weights (approximate) in mm and kg
Weights (kg) Bonnets
Dimensions (mm)
Size
A
B
C
C1*
Standard
Extended/Bellows
DN15
130
90
105
166
6.5
7.9
DN20
150
95
105
166
6.9
8.3
4.1 120
DN25
160
100
109
170
8.8
10.2
DN32
180
105
124
185
11.0
12.4
DN40 DN50 DN65 DN80 DN100
200
115
137
190
14.5
15.9
230
125
143
196
18.5
20.0
290
145
160
357
31.0
33.0
310
155
165
361
40.8
42.8
350
175
180
373
48.5
50.5
DN125
400
200
280
445
78.0
81.0
DN150
480
225
300
463
115.0
118.0
DN200
600
275
370
554
143.0
147.0
Note: The C1 dimension shown refers to valves fitted with an extended bonnet, with or without PN16 and PN25 bellows.
C, C1
B
A
TI-P359-14 CTLS Issue 8
Page 8 of 11
QLM and QLD Three-port Control Valves
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