DRESSTA 32501, Operator'S Manual

Page: 165 / 177

SECTION 6
SPECIFICATIONS
Page 12
DRESSTA TD-15H
6.7. TORQUE VALUES FOR SPLIT FLANGE CONNECTIONS
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. Over torquing bolts will damage the flanges and/or bolts, which may cause leakage.
Bolt size
[in]
Flange size
[in]*
Torque Value
[Nm]
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
20–24
30–37
37–47
47–61
62–79
75–88
107–123
187–203
159–180
* – Inside diameter of hydraulic tube or hose fitting.
6.8. TORQUE VALUES FOR HYDRAULIC TUBES AND FITTINGS
Size Tubing o.d. in
inches
Thread size in
inches
Torque values for
37 [°] flared fittings
Torque values for O-ring boss
plugs, locknuts and 37 [°] flared
fittings
4
5
6
8
10
12
14
¼
5/16
3/8
1/2
5/8
3/4
7/8
7/16–20
1/2 –20
9/16–18
3/4 –16
7/8–14
1-1/16–12
1-3/16–12
12–16
16–20
29–33
47–54
72–79
104–111
122–138
8–14
14–20
20–27
34–41
47–54
81–95
95–109
16
20
24
32 1
1- 1/4
1- 1/2
2
1-5/16–12
1-5/8–12
1-7/8–12
2-1/2–12
149–163
190–204
217–237
305–325 108–122
129–156
163–190
339–407
Above torque figures are recommended for plain, cadmium or zinc plated fittings, dry or wet
installations. These torques are not recommended for tube with wall thickness of 0.9 [mm] or less.
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