SB-170-10 77
9.3 Disposing of the compressor
Drain the oil from the compressor. Dispose of waste oil
properly! Have the compressor repaired or dispose of it
properly!
When returning compressors that have been operated
with flammable refrigerant, mark the compressor with
the symbol "Caution flammable gas", as the oil may still
contain refrigerant.
10 Mind when mounting or replacing
WARNING
The system is under pressure!
Serious injuries are possible.
Wear safety goggles!
Assess the risk of intervention and take appropriate
measures, for example: wear additional personal pro-
tective equipment, shut off system or shut off the valves
before and after the respective system part and depres-
surise.
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%).
10.1 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.
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