Bitzer CS.65 Maintenance Instructions Manual - Page 5
Browse online or download pdf Maintenance Instructions Manual for Air Compressor Bitzer CS.65. Bitzer CS.65 12 pages. Tightening torques for screwed connections of screw compressors
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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
M5
M6
M8
M10
M12
M16
M20
M20 with CS.105
SW-100-8
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 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.
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
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
30 Nm
60 Nm
70 Nm
80 Nm
110 Nm
120 Nm
300 Nm
40 Nm ①
180 Nm
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