Manual

Series GS Page 4
9540-060-en Revision 05
TM 6506 Edition 05/2006
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
e
xception, see Section 8
,
Flange connection valve /
pipe is leaking.
The following tightening torques are recommended.
Pipe screws
, flanges to ISO/DIN
Flange nom.
size
Screws
Tightening
torque
[mm] [inch] [ISO/DIN] [Nm]
15
½“
4 x M12 6
20 ¾“ 4 x M12 8
25 1 4 x M12 10
40 1½ 4 x M16 20
50 2 4 x M16 26
65 -- 4 x M16 40
80 3 8 x M16 25
100 4 8 x M16 35
Pipe screws, flanges to ASME Class 150 or flanges
ISO/DIN drilled to ASME Class 150
Flange nom.
size
Screws Tightening torque
[mm] [inch] [ASME] [in-lbs] [Nm]
15 ½“ 4 x ½“ 45 5
20 ¾“ 4 x ½“ 55 6
25 1“ 4 x ½“ 70 8
40 1½“ 4 x ½“ 135 15
50 2“ 4 x N“ 220 25
65 2½“ 4 x N“ 265 30
80 3“ 4 x N“ 400 45
100 4“ 8 x N“ 310 35
Cover screws
Flange nom.
size
Screws Tightening torque
[mm] [inch] [ISO/DIN] [Nm] [in-lbs]
15
½“
4 x M10 30 266
2
0 ¾“
4
x M10 30 266
25 1 4 x M12 50 442
40 1½ 4 x M12 50 442
50 2 4 x M12 50 442
65 -- 4 x M12 50 442
80 3 8 x M12 50 442
100 4 8 x M12 50 442
1.3 Pressure/temperature diagram
When used in the minus temperature range,
the regulations applicable in the country in
question must be observed.