User Manual

Series GSO Page 4
9540-061-en Revision 10
TM 8361 Edition 10/2011
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 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] [ISO/DIN] [Nm]
25 4 x M 12 10
40 4 x M 16 20
50 4 x M 16 26
80 8 x M 16 25
100 8 x M 16 35
Pipe screws, DIN/ISO flanges drilled to ASME Class
150
Flange
Nom. size
Screws
Tightening torque
[mm] [inch]
[ISO/DIN] [Nm] [in-lbs]
25 1“ 4 x ½“
70 8
40 1½“ 4 x ½“
135 15
50 2“
4 x
N“ 220 25
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]
25 1“
4 x M 12 50 442
40 1½“
4 x M 12 50 442
50 2“
4 x M 12 50 442
80 3“
8 x M 12 50 442
100 4“
8 x M 12 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.