Series NKS-N, NKSP-N
Page
4
9520-021-en
Revision 17
TM 10477
Edition 05/2022
Sign for transport securing device for actuator
1.2 Tightening torques
All screws greased, tighten in diametrically
opposite sequence!
The tightening torques for pipe screws and body
screws mentioned must not be exceeded. For an
exception, see
Section 7
, Flange connection
valve/pipe is leaking.
The following tightening torques are recommended.
Packing screws
screws
Tightening torque
[ISO/DIN]
[Nm]
[in-lbs]
2 x M8
3
27
Pipe screws, flanges to ISO/DIN
Flange
Nominal size
screws
Tightening
torque
[mm]
[ISO/DIN]
[Nm]
50
4 x M16
30
80
8 x M16
25
100
8 x M16
30
150
8 x M20
55
200
8 x M20
75
250
12 x M20
65
300
12 x M20
75
350
16 x M20
75
Pipe screws
, flanges to ASME Class 150 or flanges
ISO/DIN drilled to ASME Class 150
Flange
Nominal size
screws
Tightening
torque
[mm]
[inch]
[ASME]
[Nm]
[in-lbs]
50
2“
4 x ⅝“
30
266
80
3“
8 x 5/8“
25
221
100
4“
8 x 5/8“
30
266
150
6“
8 x ¾“
55
487
200
8“
8 x ¾“
75
664
250
10“
12 x 7/8“
65
575
300
12“
12 x 7/8“
75
664
350
14“
12 x 1“
75
664
Hex. socket screw 914/1 for sandwich body
Nominal size
Hex.
socket
screws
Tightening
torque
[mm]
[inch]
[ISO/DIN]
[Nm]
[in-lbs}
50
2“
2 x M10
30
266
80
3“
2 x M12
50
442
100
4“
2 x M12
50
442
150
6“
2 x M16
100
885
200
8“
2 x M16
100
885
250
10“
2 x M16
100
885
300
12“
2 x M20
200
1770
350
14“
4 x M16
100
885
Hex. socket screws are leaded. See
Section 6.2
and
8.8.1
.
1.3 Weights (approx. kg)
Nom. Size
open
Lever
Gear
[
mm]
[
inch]
bare shaft
50
2“
3.5
0.7
4.0
80
3“
4.5
0.7
4.0
100
4“
6.0
0.7
4.0
150
6“
11.0
3.7
4.5
200
8“
15.0
3.7
4.5
250
10“
25.0
–
9.5
300
12“
33.0
–
9.5
350
14“
47.0
–
15.0
Actuator see data of the manufacturer
