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Si33-102.book Page 25 Tuesday, June 26, 2001 3:18 PM
SiE33-102
Flange Connection a) The flange sheet surface should be clean and undamaged. (Clean any dirt away with a cloth and check
that there has been no damage.)
b) Coat the flange sheet surface with refrigeration oil (Ester or ether oil) and then insert the packing. (Do
not use SUNISO oil.)
c) Tighten the bolts in opposite corners first to ensure that the connection is true.
Important points
1. Only clean refrigeration/oil should be used to coat the flange. (i.e. free from dirt or water)
2. The correct amount of torque should be applied when tightening the flange bolts.
Standard torques for tightening screws and bolts
ISO hexagonal bolt
Size
M8
M10
M12
M16
M20
General Information
[Example]
Order:A→C→B→D
Class 5.8(5T)
kgf-cm ±15% N-m ±15%
125 1230
257 2520
436 4280
1,030 10,100
2,050 20,100

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Installation
The bolts should be tightened little by
little in the above order such that the
same degree of torque is applied
evenly to each corner.
10.9(10T)
kgf-cm ±15% N-m ±15%
302 2960
620 6080
1,050 10,300
2,480 24,300
4,950 48,500
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