S0309000
Page 8
Standard Torques
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TORQUE VALUES FOR SPLIT FLANGES
The following chart provides the tightening torques for split flange connections used in hydraulic systems.
Split flanges and fitting shoulders should fit squarely. Install all bolts, finger tight and then torque evenly.
NOTE:
Over torquing bolts will damage the flanges and/or bolts, which may cause leakage.
(*) - Inside diameter of flange on end of hydraulic tube or hose fitting.
NOTE:
Values stated in chart are for Standard Pressure Series (Code 61) Split Flanges.
FLANGE
SIZE (*)
BOLT
SIZE
BOLT TORQUE
KILOGRAM METER
(kg•m)
FOOT POUNDS
(ft lb)
1/2"
3/4"
1"
1 - 1/4"
1 - 1/2"
2"
2 - 1/2"
3"
3 - 1/2"
5/16"
3/8"
3/8"
7/16"
1/2"
1/2"
1/2"
5/8"
5/8"
2.1 - 2.5
3.0 - 3.7
3.7 - 4.8
4.8 - 6.2
6.4 - 8.0
7.6 - 9.0
10.9 - 12.6
19.1 - 20.7
16.2 - 18.4
15 - 18
22 - 27
27 - 35
35 - 45
46 - 58
55 - 65
79 - 91
138 - 150
117 - 133
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