SB-520-2
34
10.2 Screwed connections
Metric screws
Size
Case A
Case B
M5
7 Nm
M6
9 Nm
16 Nm
M8
23 Nm
40 Nm
M10
42 Nm
80 Nm
M12
80 Nm
125 Nm
M16
150 Nm
220 Nm
M20
220 Nm
220 Nm
M20 with CS.105
400 Nm
Case A: Screws without flat gasket, property class 8.8
or 10.9
Case B: Screws with flat gasket or gasket with metallic
support, property class 10.9
Metric screws of shut-off valves and counter
flanges
Size
Case C
Case D
M10
50 Nm
M12
36 Nm
100 Nm
M16
98 Nm
150 Nm
M18
136 Nm
200 Nm
M20
175 Nm
200 Nm
M24
320 Nm
Case C: Screws of property class 5.6
Case D: Screws of property class 8.8. They can be
used for welding flanges as well.
Plugs without gasket
Size
Brass
Steel
1/8-27 NPTF
35 .. 40 Nm
15 .. 20 Nm
1/4-18 NPTF
50 .. 55 Nm
30 .. 35 Nm
3/8-18 NPTF
85 .. 90 Nm
50 .. 55 Nm
1/2-14 NPTF
95 .. 100 Nm
60 .. 65 Nm
3/4-14 NPTF
120 .. 125 Nm
80 .. 85 Nm
Wrap thread with sealing tape before mounting.
Screwed connections with aluminium gasket:
sealing screws, plugs and screwed nipples
Size
M10
30 Nm
M18 x 1,5
60 Nm
M20 x 1,5
70 Nm
M22 x 1,5
80 Nm
M26 x 1,5
110 Nm
M30 x 1,5
120 Nm
M48 x 1,5
300 Nm
G1/4
40 Nm ①
G1 1/4
180 Nm
①: Screwed nipple of pressure transmitter: 35 Nm
Sealing screws or plugs with O-ring
Size
1 1/8-18 UNEF
50 Nm
M22 x 1,5
40 Nm
M52 x 1,5
100 Nm
Sealing nuts with O-ring
Thread
AF
3/4-16 UNF
22
50 Nm
1-14 UNS
30
85 Nm
1 1/4-12 UNF
36
105 Nm
1 3/4-12 UN
50
150 Nm
2 1/4-12 UN
65
180 Nm
AF: width across flats in mm
10.3 Solenoid valves
Fixing nuts of solenoid coil
Size
M10
5 Nm
M14
15 Nm
Screwed connection of electric connector M3: 1 Nm