u-rai - equipamiento industrial ® rotary positive blowers/exhausters copyright 2002 dresser,inc....

B-12X95April 2002

ROOTS

U-RAI®

rotary positive blowers/exhausters

Copyright 2002 Dresser,Inc. All rights reserved.ROOTS is a trademark of Dresser, Inc.Universal RAI and URAI are registered Trademarks of Dresser, Inc.All information subject to change without notice.

Greater pressuwith proven

Versatile, reliableROOTSTM Univers

Remarkably adaptableYou can mount the Universal RAI®

blower upside down or rightside up,with vertical or horizontal flow, andwith the drive shaft rotating in eitherdirection. With 17 frame sizes tochoose from, you have the perfectblower to fit your application withlittle or no modification.

More performance, tooNow the Universal RAI® line-up hasa broader range and is more ruggedthan ever, with flows to 2460 CFM,vacuums to 16" Hg and pressures to15 PSIG. You get a blower that notonly fits but gives you the bestperformance in its class.

Copyright 2002 Dresser,Inc. All rights reserved.ROOTS is a trademark of Dresser, Inc.

Universal RAI and URAI are registered Trademarks of Dresser, Inc.All information subject to change without notice.

ssure and flowen reliability

ersal RAI® blowerFITS your application

Low costThe ROOTS Universal RAI® line ofblowers is designed with the latestengineering technology and built usingthe most modern manufacturingprocesses. This results in cost savingswe can pass along to you. This genuineROOTS blower can actually cost lessthan ordinary competitive units.

Built-in reliabilityEach Universal RAI® is precisionmachined on the latest CNCequipment, assuring close tolerancesbetween the impellers, casing andheadplates to minimize “slippage” of air,improving efficiency and reliability.ROOTS exclusive “Figure 8” gearboxdesign improves oil distribution andlengthens bearing and gear life.Oversize anti-friction bearings supportthe shaft, and, on the drive, cylindricalroller bearings will resist V-belt pull andextend service life.

Fast deliveryThanks to over 45 stocking centersthroughout North America, you’ll geton-time delivery. You can scheduleproduction, reduce your inventory,anticipate your costs —and meet yourdeadlines.

Better serviceWith nearly 100 sales and distributionlocations, only ROOTS can offer thekind of responsive service andapplications assistance that theindustry’s largest service networkprovides.

Iron-clad warrantyROOTS is the leader in warranties,too — the first to introduce a full 2year warranty. We’ll protect you oryour customer for a full 24 monthsafter start-up, not to exceed 30months after shipment.


1. Exclusive gearbox design“Figure 8” gearbox actually improves oil distribution for longer gearand bearing life with smoother operation.

2. Taper mounted timing gearsCarburized and ground alloy steel gears are precision machinedand taper fitted to alloy steel shafts, eliminating the need forunreliable timing pins.

3. Original ROOTS impeller designDynamically balanced ROOTS impellers are center-timed to alloweither clockwise or counterclockwise rotation.

4. Long-life anti-friction bearingsOversize cylindrical roller bearings at the drive shaft handle v-beltstress; all bearing points are engineered for long service life.

You get increased performance through ROOTS’extensive improvement program and life testing.

Here’s how…

Vertical Gear End Drive Shaft Bottom Drive Shaft on TopVERTICAL MOUNTING

(Horizontal air flow)6

45

3



Two “Figure 8” lobe impellers, mounted onparallel shafts, rotate in opposite directions. Aseach impeller passes the blower inlet, it trapsdefinite volume of air and carries it around thecase to the blower outlet, where the air isdischarged. With constant speed operation, thedisplaced volume is essentially the sameregardless of pressure, temperature or barometricpressure.

Timing gears control the relative position ofimpellers to each other and maintain small butdefinite clearances. This allows operation withoutlubrication inside the air casing.

Operating Principle

Horizontal Gear End Drive Shaft on Left Drive Shaft on RightHORIZONTAL MOUNTING

(Vertical air flow)

5. Versatile mountingYou can mount the Universal RAI® in multiplepositions to accommodate your specific needs.With your choice of 17 frame sizes, there’s aUniversal RAI that fits right into your OEM orreplacement application.

2

1

4

65

6. Rugged steel mounting feetThe Universal RAI can be easily changedfrom horizontal flow to vertical flow using thesame mounting feet. They’re eveninterchangeable with the mounting holes ofcompetitive Roots-type blowers.


Performance SpecificationsUniversal RAI® Pressure Table

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22061100635725

76437

3.08.02.1

21486

4.03.19.1

9366

6.13.2

8346

8.17.2

6336

1.21.3

2395

8.22.4

1375

1.35.4

9265

3.39.4

42061100635725

9179051

4.03.19.1

1198341

8.03.24.3

868041

9.08.22.4

38731

3.39.4

18531

8.36.5

23061100820063

43801441

6.06.10.2

72101731

1.17.24.3

4289431

3.12.31.4

1259131

6.18.38.4

9139921

8.13.45.5

68221

0.67.7

48021

5.64.8

28811

1.71.9

18711

6.78.9

97511

2.85.01

77311

7.82.11

33061100820063

84941991

8.00.25.2

93041981

4.15.35.4

53631581

7.12.44.5

13231181

1.20.54.6

82921871

4.27.54.7

021071

0.83.01

811761

7.82.11

611561

5.92.21

63061100820063

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2.13.35.4

27932123

3.28.57.7

66432513

8.20.73.9

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3.33.89.01

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8.35.95.21

2406806710063

2378891

6.03.16.2

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1.12.25.4

1257681

3.17.25.5

8127381

5.11.34.6

5196181

8.16.34.7

26371

0.52.01

06171

5.52.11

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9.51.21 761 1.31 561 1.41 361 0.51

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86771004

1.12.23.5

35261583

0.21.41.9

84651973

4.20.50.11

24151473

9.29.59.21

73641963

4.39.68.41

331653

6.95.02

7406806710063

29632925

4.18.20.7

37712015

6.23.50.21

66902305

2.35.63.41

95302694

8.37.70.71

35691094

4.49.85.91

3500706710582

36302643

0.17.20.5

15191433

8.17.42.8

64681923

2.27.59.9

24181523

6.27.65.11

83771123

0.37.72.31

761013

8.011.81

361703

8.117.91

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8.213.12

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2.410.32

551892

2.516.42 592 2.62

6500706710582

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6.16.40.8

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9.27.75.31

58913065

6.34.92.61

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3.41.110.91

27603745

9.48.217.12

092135

9.710.03

582625

6.917.23

082125

672715

0.322.83

9500706710582

071315568

2.24.68.11

741094248

2.44.119.91

831084238

1.58.319.32

031274428

1.63.619.72

464618

8.819.13

5600706710532

621783325

8.13.57.7

701863315

3.31.98.21

001063605

1.40.113.51

39353994

8.48.218.71

68743294

5.57.413.02

07033574

8.74.024.72

523074

3.224.03

023664

2.429.23

613164

1.625.53

113754

9.720.83

703254

8.925.04

8600706710532

302126558

7.29.74.11

271195428

1.50.415.91

061975218

3.60.715.32

941765108

5.70.026.72

931755097

7.81.326.13

035367

2.238.34

225557

2.538.74

515847

2.839.15

705047

3.149.55

005337

3.440.06

51600706710532

08346111061

8.49.313.91

32370114451

3.92.526.43

10348011251

6.118.032.34

97236010051

8.315.638.94

06244011841

2.612.244.75

6757500410502

971115277

3.24.65.01

851094157

3.45.118.71

051184247

4.59.314.12

241374437

4.64.610.52

431664727

4.78.816.82

511744807

4.013.625.93

144307

7.821.34

634796

2.137.64

124486

7.334.05

514976

1.630.45

124286

6.836.75

11757500410502

6334494241

0.40.115.71

9928097831

7.70.027.03

4823983731

6.95.423.73

1720889531

4.110.929.34

8527687431

3.315.335.05

6225385131

8.811.743.07

81757500410502

36535513332

3.60.719.62

01500510822

3.216.139.74

98497419522

4.510.936.85

07406410422

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3.10.2

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6.14.2

8255

0.27.2 35 1.3

42061100635725

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3.02.19.1

2109441

6.07.16.2

58931

1.23.3

08431

6.29.3

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1.36.4

96221

8.33.5 911 8.5

23061100820063

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5.04.19.1

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7.09.16.2

3279331

9.05.23.3

8129821

3.19.28.3

78321

4.35.4

18711

0.42.5

87411

5.46.5 011 9.5

33061100820063

74841791

6.09.16.2

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9.06.26.3

33431481

3.14.35.4

72821771

7.10.42.5

121071

7.42.6

311361

6.51.7 951 6.7

63061100820063

38152233

1.12.34.4

47142323

6.14.49.5

56232313

1.26.55.7

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7.26.67.8

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9.73.01 482 8.11 872 7.21

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4.00.16.2

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5.30.7 461 5.7 061 0.8

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5.22.57.11

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5.70.61 064 5.81 254 8.91

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5.74.21 692 2.31 192 0.41

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4.12.48.7

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7.25.72.31

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1.37.85.51

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1.41.115.91

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1.312.22

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6.512.62 977 1.03 077 1.23

5600706710532

321483925

7.12.56.7

011173615

4.20.70.01

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1.38.85.21

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8.32.012.41

17133674

7.41.216.61

713264

9.311.91

803454

9.413.02

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8.516.12

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891716058

6.27.72.11

771595828

8.37.011.51

651575808

0.57.311.91

531455787

2.61.611.22

235567

0.910.62

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0.220.03

594827

5.329.13 517 0.43

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7.45.311.91

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0.70.915.62

29277013151

1.96.429.33

83014741

4.920.04

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0.535.74 9831 9.45

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271605967

2.23.63.01

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2.37.89.31

931374737

2.42.114.71

321734127

1.51.310.02

711044407

2.65.515.32

224586

0.810.72

214576

2.918.82

314476

4.026.03

11757500410502

0339399141

9.38.012.71

4033193931

7.52.516.32

9728888631

5.76.911.03

4523683431

2.94.322.53

8227387131

2.118.727.14

8088821

2.231.84

3972721

4.433.15 6521 6.45

81757500410502

55554515232

2.66.619.52

71570517822

2.98.324.63

28427412522

1.219.039.64

64463416122

0.514.739.55

89318712

6.444.66

Universal RAI® Vacuum Table


Dresser, Inc.

website: www.rootsblower.com • email: [email protected]

Dresser ROOTS2135 Hwy 6 SouthHouston, TX 77077PH: 281-966-4700FX: 281-966-4309Toll Free: 1-877-363-ROOT(S)

Dresser ROOTS - Connersville900 West Mount StreetConnersville, IN 47331PH: 765-827-9200FX: 765-827-9266

Dresser ROOTS , Holmes OperationPO Box B7Off St. Andrews RdTurnbridge, HuddersfieldEngland HD1 6RBPH: +44-1484-422222FX: +44-1484-422668

B-12X95April 2002

Frame Sizes

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22 31.5 00.5 57.9 57.3 52.6 57.3 36.9 88.6 52.6 52.9 00.5 526. 490.x881. TPN0.1 52.1 23

42 31.5 00.7 57.11 57.3 52.6 57.3 36.9 88.6 52.6 52.9 00.5 526. 490.x881. TPN0.2 52.1 34

23 52.7 57.6 52.11 00.5 05.8 00.5 18.21 88.8 57.7 31.21 57.6 057. 490.x881. TPN52.1 57.1 96

33 52.7 36.7 31.21 00.5 05.8 00.5 18.21 88.8 57.7 31.21 57.6 057. 490.x881. TPN0.2 57.1 47

63 52.7 00.01 36.41 00.5 05.8 00.5 18.21 88.8 57.7 31.21 57.6 057. 490.x881. TPN5.2 57.1 201

24 00.8 52.7 00.31 52.6 52.01 52.6 60.51 36.01 57.8 36.31 52.8 578. 490.x881. TPN5.1 00.2 88

54 00.8 00.01 05.51 52.6 52.01 52.6 60.51 36.01 57.8 36.31 52.8 578. 490.x881. TPN5.2 00.2 901

74 00.8 57.11 36.71 52.6 52.01 52.6 60.51 05.01 05.8 36.31 52.8 578. 490.x881. TPN0.3 00.2 821

35 05.01 83.8 83.51 52.6 52.11 57.6 83.71 88.11 52.01 52.71 57.8 521.1 521.x052. TPN5.2 05.2 341

65 05.01 00.11 00.81 52.6 52.11 57.6 83.71 52.21 00.11 52.71 57.8 521.1 521.x052. TPN0.4 05.2 071

95 05.01 00.41 81.12 52.6 52.11 57.6 83.71 52.21 00.11 52.71 57.8 521.1 521.x052. TPN0.4 05.2 402

56 *00.11 00.01 83.81 57.8 57.41 57.8 36.12 31.51 57.21 57.91 57.11 573.1 651.x213. TPN0.3 00.3 542

86 *00.11 00.31 83.12 57.8 57.41 57.8 36.12 31.51 57.21 57.91 57.11 573.1 651.x213. TPN0.5 00.3 582

516 *00.11 00.02 83.82 57.8 57.41 57.8 36.12 52.61 00.51 57.91 57.11 573.1 651.x213. GLF0.6 00.3 524

67 **00.41 57.11 49.91 00.11 00.81 00.11 31.62 96.02 83.91 52.32 05.41 265.1 881.x573. TPN0.4 05.3 004

117 **00.41 57.61 91.52 00.11 00.81 00.11 31.62 05.91 00.71 52.32 05.41 265.1 881.x573. GLF0.6 05.3 035

817 **00.41 57.32 91.23 00.11 00.81 00.11 31.62 05.91 00.71 52.32 05.41 265.1 881.x573. GLF0.8 05.3 056

*17.00 in horizontal configuration All dimensions in inches**21.00 in horizontal configuration

u-rai - equipamiento industrial ® rotary positive blowers/exhausters copyright 2002 dresser,inc....

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