Richter GS Series Strainers - Manual (Page 4)

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
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] [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
20 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.