KSB GIW MDX, Installation & Operating Manual

Page: 49 / 53

MDX [en-US]
49
11 Tooling
11.1 Torque Requirements
Torque requirements listed below and in previous sections are for lubricated bolting. All bolts must be lubricated to ease in pump
assembly and disassembly. Anti seize compound is preferred, but well oiled is also acceptable.
Special Torque Requirements

Fastener torque must be accurately measured to achieve the proper clamping force as defined either on the assembly
drawing or previous sections listed below. The use of a Hydraulic Torque Wrench is recommended as these tools can
be calibrated to produce the necessary accuracy.

For bearing housing hold down bolt torque refer to Section 8.4 "Bearing Assembly Mounting".

If the pump is equipped with an impeller release ring refer to 10.3 "Wet End Assembly" for torque requirements.

If the pump is equipped with a mechanical seal is used refer to the Mechanical Seal Manual for torque requirements.
Non-Critical Torque Requirements
No special torque requirements exist for the remaining nuts and bolts unless specifically called for on the assembly drawing.
Bolts and nuts for which torque is not specified should be tightened enough to ensure a firm mating between parts in accordance
with good maintenance practice. Where possible, the use of an air driven impact wrench is recommended for bolts over one
inch (25 mm) in diameter.
ENGLISH FASTENERS
Size
Anti-Sieze Lubricated / Oiled
Pump Assembly
Fasteners
Mounting Equipment
to Sub Base
Pump Assembly
Fasteners
Mounting Equipment
to Sub Base
ft-lbs N-m ft-lbs N-m ft-lbs N-m ft-lbs N-m
1/4" 3 5 5 6 5 6 7 9
3/8" 12 17 17 23 19 25 25 35
1/2" 30 40 40 55 45 60 60 85
5/8" 60 80 85 115 90 120 125 170
3/4" 105 145 150 200 160 215 220 300
7/8" 175 230 240 325 250 350 360 485
1" 260 350 360 490 385 520 540 730
1 1/8" 320 430 445 600 470 645 660 900
1 1/4" 450 610 620 850 670 910 940 1,275
1 3/8" 590 800 825 1,115 880 1,195 1,225 1,670
1 1/2" 780 1,060 1,090 1,480 1,170 1,585 1,635 2,220
1 3/4" 915 1,240 1,280 1,735 1,370 1,850 1,920 2,600
2" 1,375 1,864 1,925 2,610 2,060 2,795 2,885 3,910
2 1/4" 2,010 2,726 2,815 3,815 3,015 4,085 4,220 5,725
2 1/2" 2,750 3,729 3,850 5,220 4,125 5,590 5,775 7,825
METRIC FASTENERS
Size
Anti-Sieze Lubricated / Oiled
Pump Assembly
Fasteners
Mounting Equipment
to Sub Base
Pump Assembly
Fasteners
Mounting Equipment
to Sub Base
ft-lbs N-m ft-lbs N-m ft-lbs N-m ft-lbs N-m
M8 8 11 10 14 10 15 16 20
M10 15 21 20 28 20 30 30 40
M12 25 35 35 50 40 50 55 75
M16 65 90 90 125 100 130 135 180
M20 130 180 180 250 195 265 270 370
M22 175 250 240 335 260 360 370 500
M24 225 315 305 425 335 450 470 640
M27 325 455 440 615 490 660 680 925
M30 450 625 605 850 670 910 940 1,270
M36 780 1,090 1,060 1,480 1,170 1,600 1,640 2,220
M38 920 1,285 1,250 1,740 1,375 1,865 1,930 2,615
M39 995 1,390 1,350 1,885 1,490 2,020 2,090 2,830
M42 1,245 1,740 1,685 2,360 1,865 2,530 2,610 3,540
M48 1,860 2,610 2,525 3,540 2,795 3,790 3,910 5,300
M64 4,445 6,220 6,025 8,440 6,670 9,040 9,335 12,650
Values based on Grade 5 fasteners
Torque Values taken at 50% Proof Strength for Pump Assembly Fasteners
70% Proof Strength for Mounting Equipment to Sub Base
K-Factors = 0.120 for Anti Sieze
0.180 for Lubricated / Oiled