Flowserve Twin Screw Rotary - Manual (Page 39)

TWIN SCREW PUMPS. ORIGINAL USER INSTRUCTIONS. ENGLISH. 71569243 – 07/10
Page 36 of 53
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6.4 Tools required
No special tools are required for assembly or
disassembly.
6.5 Torques for fasteners
Recommended torques for tightening the bolts and
screws on the pumps are given in the following tables.
6.5.1 Carbon steel bolts/nuts SAE grade 2
(1)
Thread Size (Inch) Recommended Torque Values (Ft-lbs)
3/8 17
½ 40
5/8 80
¾ 135
7/8 150
1 210
1-1/8 300
1-1/4 420
1-3/8 550
1-1/2 720
(1)
These values are also suitable for 300 series stainless
steel, Monel, Inconel, Hastelloy, B & C and Alloy 20 fasteners.
6.5.2 High strength steel bolts/nuts SAE
grade 5
Thread Size
(Inch)
Recommended Torque Values
(ft.lbs)
3/8 27
½ 65
5/8 125
¾ 225
7/8 365
1 545
1-1/8 675
1-1/4 950
1-3/8 1240
1-1/2 1430