Screwed Connections; Solenoid Valves - Bitzer OSKA9553 Instructions De Service

10.2 Screwed connections

Metric screws
Size
M5
M6
M8
M10
M12
M16
M20
M20 with CS.105
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
M10
M12
M16
M18
M20
M24
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
1/8-27 NPTF 35 .. 40 Nm
1/4-18 NPTF 50 .. 55 Nm
3/8-18 NPTF 85 .. 90 Nm
1/2-14 NPTF 95 .. 100 Nm
3/4-14 NPTF 120 .. 125 Nm
Wrap thread with sealing tape before mounting.
34
Case A Case B
7 Nm
9 Nm 16 Nm
23 Nm 40 Nm
42 Nm 80 Nm
80 Nm 125 Nm
150 Nm 220 Nm
220 Nm 220 Nm
400 Nm
Case C Case D
50 Nm
36 Nm 100 Nm
98 Nm 150 Nm
136 Nm 200 Nm
175 Nm 200 Nm
320 Nm
Steel
15 .. 20 Nm
30 .. 35 Nm
50 .. 55 Nm
60 .. 65 Nm
80 .. 85 Nm
Screwed connections with aluminium gasket:
sealing screws, plugs and screwed nipples
Size
M10
M18 x 1,5
M20 x 1,5
M22 x 1,5
M26 x 1,5
M30 x 1,5
M48 x 1,5
G1/4
G1 1/4
①: Screwed nipple of pressure transmitter: 35 Nm
Sealing screws or plugs with O-ring
Size
1 1/8-18 UNEF
M22 x 1,5
M52 x 1,5
Sealing nuts with O-ring
Thread
3/4-16 UNF
1-14 UNS
1 1/4-12 UNF
1 3/4-12 UN
2 1/4-12 UN
AF: width across flats in mm

10.3 Solenoid valves

Fixing nuts of solenoid coil
Size
M10
M14
Screwed connection of electric connector M3: 1 Nm
30 Nm
60 Nm
70 Nm
80 Nm
110 Nm
120 Nm
300 Nm
40 Nm ①
180 Nm
50 Nm
40 Nm
100 Nm
AF
22 50 Nm
30 85 Nm
36 105 Nm
50 150 Nm
65 180 Nm
5 Nm
15 Nm
SB-520-2