SW-100-8 5
1 Mind when mounting or replacing
WARNING
The compressor is under pressure!
Serious injuries are possible.
Wear safety goggles!
Assess the risk of intervention and take appropriate
measures: Wear additional personal protective equip-
ment, shut off system and depressurise compressor if
necessary.
Before mounting
▶ Clean threads and threaded bores carefully.
▶ Use new gaskets only!
▶ Do not oil gaskets with metallic support.
▶ Flat gaskets may be moistened slightly with oil.
Admissible screwing methods
• Tighten with calibrated torque spanner to indicated
torque.
• Tighten with pneumatic impact wrench and retighten
with calibrated torque spanner to indicated torque.
• Tighten with electronically controlled angled wrench
to indicated torque.
Tolerance range of tightening torques: ±6% of nominal
value
Flange connections
▶ Tighten them crosswise and in at least 2 steps
(50/100%).
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: 35Nm
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