B-2231-UK-11-2013-REV. C
An
Company
Dim.
Valve Torque /Nm *1
10º
20º
30º
40º
50º
60º
70º
80º
90º
DN40
PN16
12
Optional
choise
<1
<1
4
12
17
32
45
53
62
DN50
12
<1
<1
5
14
29
47
71
98
107
DN65
17
1
2
11
27
50
77
122
171
213
DN80
24
3
6
28
54
91
140
213
301
404
DN100
35
5
14
57
108
175
262
404
594
799
DN125
59
6
27
84
156
248
385
624
954
1239
DN150
84
7
51
129
224
363
572
977
1535
1929
DN200
PN10
164
PN16
200
22
114
229
401
639
1018
1755
2880
3484
DN250
280
280
33
171
334
634
970
1530
2650
4403
5753
DN300
386
402
49
250
490
925
1416
2231
3865
6641
8828
DN350
700
770 118
301
631
1131
1918
3081
4963
8884 10308
DN400
850
1094 153
393
824
1478
2506
4024
6482 11603 13464
DN450
1497
1500 195
498
1043
1871
3170
5093
8210 14686 17041
DN500
1988
3690 240
615
1288
2309
3913
6287 10128 18130 21038
DN600
3264
5830 345
885
1853
3326
5635
9054 14584 26109 30295
Opening angle
Kv-valve rated flow coefficients (m³/h at 1 bar ΔP)
Above mentioned
torques are based on on/off services/lubricating liquid.
*1) NBR / EPDM / FPM
Kv = The number of m³ per hour of 20º C water at 1 bar pressure drop.
Cv = 1.167 Kv.
Cv = The number of US gallons per minute of 60º F water at 1 psi pressure drop.
Dim.
Valve
Torque / Nm 10º
20º
30º
40º
50º
60º
70º
80º
90º
DN50
23
1
3
9
21
39
64
93
104
109
DN65
29
2
6
17
39
72
123
177
199
208
DN80
44
4
10
26
63
114
193
278
313
327
DN100
75
7
13
37
85
151
226
452
567
604
DN125
100
11
30
59
148
247
435
740
919
991
DN150
125
17
45
89
223
372
654
1112
1380
1486
DN200
213
30
68
160
267
482
749
1417
2434
2674
DN250
288
49
127
254
425
764
1189
2252
3867
4260
DN300
450
75
195
380
655
1171
1823
3453
5929
6538
DN350
850
101
262
526
871
1580
2456
4648
7981
8817
DN400
1225
130
342
684
1123
2051
3188
6039
10358
11392
DN450
1688
169
445
890
1484
2672
4156
7868
13508
14859
DN500
2125
212
560
1121
1864
3363
5231
9903
16999
18624
DN600
3625
312
820
1640
2734
4923
7657
14493
24889
27342
Opening angle
Kv-valve rated flow coefficients (m³/h at 1 bar ΔP)
Kv = The number of m³ per hour of 20º C water at 1 bar pressure drop.
Cv = 1.167 Kv.
Cv = The number of US gallons per minute of 60º F water at 1 psi pressure drop.
From DN350 to DN600 valves, if the normal pressure is 16 bar, Kv the torque value is the same as the values for the wafer and lug models.
Torques and flow capacities for Type 2231 / 2241
Torques and flow capacities type 2400
Service factor [SF]
Multiply by
Medium factor [MF]
Multiply by
Medium factor [MF]
Multiply by
ON/OFF operation
1.15
Lubricating liquid/gas
0.90
For dry service (Dry gas
/air)
1.25
Modulating operation
1.25
Viscous Liquids, Molasses
1.30
Dirty air slurry, natural
gas, dirty slurry,
1.50-1.80
*) 2 cycle/day “NC”
1.15
Degreasing liquid
1.25
Lime water, chlorin gas,
oxygen, powder
1.50-1.80
**) 1 cycle/week “NC”
1.50
Saturated steam
1.20
Hydrodynamic torque
NA
Service- and media factor - Actuator Sizing
*Valve is completely closed and opens 2 times a day minimum.
** Valve is completely closed and opens only one time per week or longer. Having a long period without maneuvering the valve, will increase the breakaway torque.
NB: Please maneuver the DVC butterfly valve at least one time per month to avoid deformation of the rubber seat.
EXAMPLE OF ACTUATOR SIZING:
Simple ON/OFF operation, Medium: Molasses, Valve: 2231 DN100.
1.15[SF] x 1.30[MF] x 34[Nm] =
50.8Nm
(Sizing torque actuator)
Only choose one Service Factor
[SF]
and one Medium factor
[MF]
when calculating the sizing torque.
...OR...
...OR...
...OR...
16
Know-how makes the difference
