User guide

Series NKS-C, NKSP-C, NKL-C, NKLP-C Page 10
9520-072-en Revision 01
TM 8176 Edition 03/2011
1.8 Breakaway torques
Nom. size
Md
erf
Md
S
Md
H
Md
T
[mm]
[inch]
[Nm]
[Nm]
[Nm]
[Nm]
50
2“
26 159 103 105
65
2½"
36 159 103 105
80
3“
46 159 103 105
100
4“
60 335 216 222
125
5"
80 335 216 222
150
6“
110 608 393 402
200
8“
167 456 295 302
250
10“
278 664 457 469
300
12“
333 664 457 469
350
14“
450 1227 845 866
400
16“
500 1227 845 866
450
18"
600 1519 2004 2053
500
20"
650 1519 2004 2053
600
24"
890 3170 4181 4283
700
28"
1500 3170 4181 4283
750
30"
2000 5418 7147 7321
800
32"
2300 5418 7147 7321
900
36"
2700 5418 7147 7321
1000
40"
3400 10374 7147 7321
Md
erf
= incl. 10% safety Md
H
= Hastelloy stem
Md
S
= Stainless steel stem Md
T
= Titanium stem
1.9 Cavitation coefficient z for
75% duty
Nom. size
at kv/kvs = 75 %
[mm]
[inch]
z
50
2“
0,60
65
2½"
0,46
80
3“
0,47
100
4“
0,27
125
5"
0,40
150
6“
0,38
200
8“
0,29
250
10“
0,48
300
12“
0,45
350
14“
0,48
400
16“
0,56
450
18"
0,49
500
20"
0,49
600
24"
0,48
700
28"
0,29
750
30"
0,30
800
32"
0,30
900
36"
0,31
1000
40"
0,40
1.10 Pressure-temperature-diagram
When used in the minus temperature range, the regulations applicable in the country in question must be
observed.