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URAI®
ROTARY POSITIVE BLOWERS/EXHAUSTERS
B-12X95October 2004
Versatile, reliableROOTS™ Universal RAI® blower
fits your application
More performance, tooNow the Universal RAI® line-up has a broader range and is more rugged than ever,with flows to 2460 CFM, vacuums to 16" Hgand pressures to 15 PSIG. You get a blowerthat not only fits but gives you the best performance in its class.
Remarkably adaptableYou can mount the Universal RAI® blowerupside down or rightside up, with verticalor horizontal flow, and with the drive shaftrotating in either direction. With 17 framesizes to choose from, you have the perfectblower to fit your application with little or no modification.
Low costThe ROOTS Universal RAI® line of blowers isdesigned with the latest engineering technology andbuilt using the most modern manufacturing process-es. This results in cost savings we can pass along toyou. This genuine ROOTS blower can actually costless than ordinary competitive units.
Built-in reliabilityEach Universal RAI® is precision machined on thelatest CNC equipment, assuring close tolerancesbetween the impellers, casing and headplates tominimize “slippage” of air, improving efficiency andreliability. ROOTS exclusive “Figure 8”gearbox design improves oil distribution and length-ens bearing and gear life. Oversize anti-friction bearings support the shaft, and, on thedrive, cylindrical roller bearings will resist V-belt pull and extend service life.
Fast deliveryThanks to over 45 stocking centers throughout NorthAmerica, you’ll get on-time delivery. You can sched-ule production, reduce your inventory, anticipate yourcosts —and meet your deadlines.
Better serviceWith nearly 100 sales and distribution locations, onlyROOTS can offer the kind of responsive service andapplications assistance that the industry’s largestservice network provides.
Iron-clad warrantyROOTS is the leader in warranties, too — the first tointroduce a full 2 year warranty. We’ll protect you oryour customer for a full 24 months after start-up, notto exceed 30 months after shipment.
Greater pressure and flow with proven reliability
You get increased performance through ROOTS’extensive improvement program and life testing.
Here’s how…1. Exclusive gearbox design
“Figure 8” gearbox actually improves oil distribution for longer gear and bearing life with smoother operation.
2. Taper mounted timing gearsCarburized and ground alloy steel gears are precision machined and taper fitted to alloy steel shafts, eliminating the need for unreliable timing pins.
3. Original ROOTS impeller designDynamically balanced ROOTS impellers are center-timed to allow either clockwise or counterclockwise rotation.
4. Long-life anti-friction bearingsOversize cylindrical roller bearings at the drive shaft handlev-belt stress; all bearing points are engineered for long service life.
Vertical Gear End Drive Shaft Bottom Drive Shaft on Top
VERTICAL MOUNTING(Horizontal Air Flow)
5
6
4
3
Operating Principle
Two “Figure 8” lobe impellers, mounted on parallelshafts, rotate in opposite directions. As eachimpeller passes the blower inlet, it traps definitevolume of air and carries it around the case to theblower outlet, where the air is discharged. Withconstant speed operation, the displaced volume isessentially the same regardless of pressure, tem-perature or barometric pressure.
Timing gears control the relative position ofimpellers to each other and maintain small butdefinite clearances. This allows operation withoutlubrication inside the air casing.
5. Versatile mountingYou can mount the Universal RAI® in multiple positions to accommodate your specific needs. With your choice of 17 frame sizes, there’s a Universal RAI that fits right into yourOEM or replacement application.
6. Rugged steel mounting feetThe Universal RAI® can be easily changed from horizontal flow to vertical flow using the same mounting feet.They’re even interchangeable with the mounting holes of competitive Roots-type blowers.
Horizontal Gear End Drive Shaft on Left Drive Shaft on Right
HORIZONTAL MOUNTING(Vertical Air Flow)
5
6
4
2
1
2229
5031
0.9
291.
127
1.3
261.
524
1.7
231.
921
2.1
1320
1.3
3550
401.
039
1.3
371.
535
1.8
342.
032
2.3
312.
528
3.0
1428
1.7
5275
681.
666
2.0
642.
463
2.7
613.
160
3.5
593.
856
4.6
1553
2.8
2429
5068
1.7
652.
163
2.5
602.
914
482.
835
5088
2.0
852.
582
3.0
793.
514
673.
452
7514
33.
114
03.
913
74.
613
45.
415
119
5.5
3217
5054
1.4
511.
748
2.1
452.
443
2.8
413.
139
3.5
354.
113
372.
229
5010
82.
410
53.
010
23.
699
4.2
974.
795
5.3
935.
989
7.1
877.
686
8.2
848.
815
844.
335
5013
53.
013
23.
712
94.
412
65.
112
45.
812
26.
512
07.
211
68.
611
49.
311
310
.011
110
.616
108
5.6
3317
5075
1.9
712.
467
2.9
643.
361
3.8
584.
356
4.7
515.
713
533.
029
5014
93.
314
54.
114
14.
913
85.
713
56.
513
27.
313
08.
112
59.
715
119
5.9
3550
186
4.1
182
5.0
178
6.0
175
6.9
172
7.9
169
8.8
167
9.8
162
11.7
1515
67.
236
1750
132
3.2
126
3.9
121
4.7
117
5.5
1495
5.4
2950
254
5.5
249
6.8
244
8.1
239
9.4
1521
29.
835
5031
66.
731
08.
330
59.
930
011
.515
273
11.9
4217
5078
1.9
742.
471
2.8
693.
366
3.7
644.
261
4.7
575.
655
6.0
1455
3.2
2950
150
3.3
147
4.1
144
4.9
141
5.7
139
6.5
136
7.2
134
8.0
130
9.6
128
10.3
126
11.1
124
11.9
1612
16.
235
5018
74.
118
35.
118
06.
017
77.
017
57.
917
28.
817
09.
816
611
.616
412
.616
213
.516
014
.416
157
7.6
4517
5016
13.
815
54.
715
05.
614
56.
614
07.
513
68.
413
29.
314
121
6.4
2950
306
6.7
300
8.2
295
9.8
290
11.3
285
12.9
281
14.4
277
16.0
1625
312
.535
5037
98.
237
310
.136
812
.036
313
.935
815
.735
417
.634
919
.516
326
15.2
4717
5021
55.
020
86.
220
17.
419
58.
614
165
8.4
2950
407
8.8
399
10.8
392
12.9
386
14.9
1534
815
.435
5050
210
.949
513
.348
815
.848
218
.315
444
18.8
5311
7011
32.
710
83.
410
34.
199
4.8
965.
492
6.1
896.
882
8.1
1385
4.3
1750
189
4.2
184
5.2
180
6.2
176
7.2
172
8.2
168
9.2
165
10.3
159
12.3
156
13.3
153
14.3
1515
17.
528
5033
47.
432
99.
032
510
.732
112
.331
714
.031
315
.631
017
.230
420
.530
122
.129
823
.829
525
.416
291
13.4
5611
7019
64.
618
85.
718
26.
917
58.
017
09.
116
410
.215
911
.415
013
.614
146
7.8
1750
324
7.0
316
8.7
310
10.4
304
12.1
298
13.8
292
15.5
287
17.2
278
20.5
273
22.2
1526
612
.628
5056
712
.256
015
.055
317
.754
720
.554
123
.253
626
.053
028
.752
134
.251
737
.016
501
22.4
5911
7029
96.
729
08.
428
110
.027
311
.714
237
11.4
1750
486
10.3
477
12.8
469
15.2
461
17.7
1541
418
.428
5084
218
.083
222
.082
426
.081
630
.015
770
30.8
6511
7022
35.
221
56.
420
87.
720
28.
919
610
.219
011
.518
512
.717
515
.217
116
.516
617
.714
171
8.7
1750
365
8.0
358
9.9
351
11.8
344
13.7
339
15.6
333
17.4
328
19.3
318
23.1
313
24.9
309
26.8
305
28.7
1629
715
.123
5051
311
.450
513
.948
916
.449
219
.048
621
.548
124
.047
526
.546
531
.646
134
.145
636
.645
239
.116
445
20.6
6811
7035
88.
334
510
.333
412
.332
414
.331
416
.330
518
.329
720
.328
124
.427
426
.426
728
.414
275
13.9
1750
587
12.7
574
15.7
563
18.7
553
21.8
544
24.8
535
27.8
526
30.8
510
36.8
503
39.8
496
42.9
1647
824
.023
5082
417
.881
121
.880
025
.979
029
.978
134
.077
238
.076
342
.174
750
.274
054
.273
358
.316
715
32.8
615
1170
670
15.4
647
19.1
626
22.9
607
26.7
1158
120
.517
5010
9923
.410
7629
.110
5534
.710
3640
.412
989
33.7
2350
1543
32.4
1520
40.0
1499
47.6
1480
55.2
1214
3346
.076
1170
393
8.6
383
10.6
374
12.7
367
14.8
359
16.8
352
18.9
346
21.0
333
25.1
328
27.2
322
29.2
317
31.3
1531
915
.417
5062
813
.461
816
.560
919
.660
122
.759
425
.858
728
.958
032
.056
838
.156
241
.255
744
.355
247
.416
543
24.9
2050
749
16.2
240
19.8
731
23.4
723
22.0
716
30.6
709
34.3
702
37.9
690
45.1
684
48.7
678
52.4
623
56.0
1666
429
.571
111
7073
815
.572
319
.271
023
.069
726
.868
630
.567
534
.366
538
.115
623
27.9
1750
1166
23.9
1151
29.5
1138
35.2
1125
40.8
1114
46.4
1103
52.0
1093
57.7
1610
3545
.020
5013
8728
.613
7235
.213
5941
.813
4748
.413
3555
.013
2461
.613
1468
.216
1256
53.1
718
1170
1224
25.0
1202
31.1
1183
37.2
1211
2236
.317
5019
2038
.218
9847
.418
7956
.512
1818
54.8
2050
2280
45.5
2258
56.2
2239
66.9
1221
7864
.7
Size
Spee
dCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PCF
MBH
PIN
HGV
CFM
BHP
4 PS
I5
PSI
6 PS
I7
PSI
8 PS
I9
PSI
10 P
SI12
PSI
13 P
SI14
PSI
15 P
SIVA
CUUM
DAT
AFr
ame
PE
RF
OR
MA
NC
E T
AB
LE
: R
OO
TS
Un
iver
sal U
RA
I
FRAM
ESP
EED
1 PS
I2
PSI
3 PS
I4
PSI
5 PS
I6
PSI
7 PS
I8
PSI
10 P
SI11
PSI
12 P
SI13
PSI
14 P
SI15
PSI
Max
. Vac
uum
3212
0037
0.2
300.
424
0.7
200.
916
1.1
121.
48
150.
918
0064
0.4
570.
851
1.1
471.
543
1.8
392.
236
2.5
332.
927
3.6
1035
1.7
2500
950.
688
1.1
831.
678
2.1
742.
571
3.0
673.
564
4.0
595.
056
5.5
546.
051
6.5
1356
3.2
3600
145
0.9
138
1.6
133
2.3
128
3.0
124
3.7
120
4.4
117
5.1
114
5.9
108
7.3
106
8.0
103
8.7
101
9.4
9810
.196
10.8
1693
5.7
3312
0052
0.3
420.
636
1.0
29.6
1.3
241.
620
1.9
823
1.3
1800
890.
580
1.0
721.
566
.51.
961
2.4
572.
952
3.4
483.
940
4.8
1051
2.4
2500
132
0.9
123
1.5
116
2.2
110
2.9
104
3.5
100
4.2
954.
991
5.6
846.
980
.47.
677
8.2
1380
4.3
3600
200
1.2
190
2.1
183
3.1
177
4.1
172
5.0
167
6.0
163
7.0
159
7.9
152
9.9
148
10.8
145
11.8
1513
77.
336
1200
910.
678
1.1
681.
660
2.2
522.
746
3.2
393.
88
502.
118
0015
20.
913
91.
712
92.
512
13.
311
34.
110
74.
910
15.
710
994.
025
0022
41.
321
12.
520
13.
619
24.
718
55.
817
86.
917
28.
013
150
7.2
3600
336
2.1
323
3.7
313
5.3
304
6.9
297
8.5
290
10.1
284
11.7
1524
812
.142
1200
540.
346
0.6
400.
935
1.3
301.
626
1.9
222.
28
291.
318
0090
0.6
821.
076
1.5
712.
066
2.5
622.
959
3.4
553.
949
4.8
465.
310
582.
425
0013
20.
812
41.
511
82.
211
32.
810
93.
510
54.
110
14.
898
5.5
916.
888
7.4
858.
183
8.8
809.
477
10.1
1388
4.3
3600
199
1.4
191
2.4
185
3.3
180
4.3
175
5.2
171
6.2
168
7.1
164
8.1
158
10.0
155
10.9
152
11.9
149
12.8
147
13.8
144
14.7
1614
07.
745
1200
111
0.7
971.
386
2.0
772.
669
3.2
613.
955
4.5
495.
18
672.
518
0018
41.
017
02.
015
92.
915
03.
914
24.
813
45.
812
86.
712
17.
711
09.
610
126
4.7
2500
268
1.6
254
3.0
243
4.3
234
5.6
226
6.9
219
8.2
212
9.6
206
10.9
195
13.5
1318
98.
636
0040
22.
738
74.
637
76.
536
78.
435
910
.335
212
.234
514
.133
916
.032
819
.816
297
15.4
4712
0014
80.
913
11.
711
72.
510
53.
495
4.2
865.
078
5.9
892
3.3
1800
244
1.4
226
2.6
213
3.9
201
5.1
191
6.4
182
7.6
173
8.9
1017
16.
225
0035
62.
133
83.
832
45.
631
37.
330
39.
129
310
.828
512
.513
255
11.3
3600
531
3.6
513
6.1
500
8.6
488
11.1
478
13.6
469
16.1
460
18.6
1541
019
.153
800
770.
466
0.9
571.
349
1.8
432.
237
2.7
323.
28
411.
814
0015
70.
914
51.
713
62.
512
93.
312
24.
111
64.
911
15.
710
66.
596
8.2
929.
088
9.8
1010
94.
018
0020
91.
319
82.
318
93.
418
14.
417
55.
416
96.
516
37.
515
88.
614
910
.614
511
.714
112
.713
713
.713
314
.813
144
6.7
2850
348
2.5
336
4.2
327
5.8
320
7.5
313
9.1
307
10.7
302
12.4
297
14.0
287
17.3
283
18.9
279
20.6
275
22.2
271
23.8
268
25.5
1626
213
.456
800
134
0.8
117
1.5
104
2.3
923.
182
3.9
734.
664
5.4
576.
28
793.
014
0026
71.
625
02.
923
64.
322
55.
621
56.
920
68.
319
79.
619
011
.017
613
.716
915
.016
316
.415
717
.710
195
6.7
1800
355
2.1
338
3.9
325
5.6
313
7.3
303
9.1
294
10.8
286
12.5
278
14.3
264
17.7
257
19.5
251
21.2
245
22.9
1325
711
.228
5058
84.
057
06.
855
79.
554
512
.353
515
.052
617
.851
820
.551
023
.349
628
.849
031
.548
334
.347
737
.016
457
22.4
5980
020
51.
218
32.
416
63.
515
24.
613
75.
712
86.
911
88.
08
136
4.4
1400
399
2.3
377
4.3
360
6.2
346
8.2
333
10.2
322
12.1
312
14.1
1030
99.
818
0052
83.
150
65.
648
98.
147
510
.746
213
.245
115
.744
118
.313
404
16.5
2850
867
5.9
845
9.9
828
13.9
814
18.0
802
22.0
790
26.0
780
30.0
1571
830
.865
700
128
0.8
110
1.5
962.
385
3.0
743.
865
4.5
565.
348
6.0
871
3.0
1400
301
1.8
282
3.3
269
4.8
257
6.3
246
7.8
237
9.3
229
10.8
221
12.3
206
15.3
199
16.8
193
18.3
187
19.8
181
21.3
1022
67.
518
0039
92.
538
14.
436
76.
435
58.
334
510
.233
612
.232
714
.131
916
.030
419
.929
821
.829
123
.828
525
.727
927
.627
329
.513
297
12.7
2350
534
3.8
516
6.3
502
8.9
491
11.4
480
13.9
471
16.4
462
18.9
454
21.5
440
26.5
433
29.0
426
31.5
420
34.1
414
36.6
409
39.1
1640
020
.668
700
206
1.2
177
2.5
155
3.7
136
4.9
119
6.1
104
7.3
918.
58
115
4.8
1400
483
2.7
454
5.2
431
7.6
412
10.0
396
12.4
381
14.8
367
17.2
354
19.7
331
24.5
320
26.9
309
29.3
300
31.7
290
34.1
1036
312
.018
0064
13.
861
26.
958
910
.057
013
.155
416
.253
919
.352
522
.451
225
.548
931
.747
834
.846
737
.945
841
.044
844
.113
477
20.2
2350
858
5.6
829
9.7
806
13.7
788
17.8
771
21.8
756
26.2
742
29.9
729
34.0
706
42.1
695
46.1
685
50.2
675
54.2
665
58.3
1664
232
.861
570
038
62.
333
24.
629
06.
825
59.
022
311
.38
215
8.9
1400
904
5.0
850
9.5
808
14.0
773
18.5
741
23.0
713
27.5
688
32.1
1068
122
.418
0012
006.
711
4612
.611
0418
.410
6924
.210
3730
.010
0935
.898
441
.612
922
34.7
2350
1607
9.7
1553
17.3
1511
24.8
1476
32.4
1444
40.0
1416
47.6
1391
55.2
1313
0049
.7
SIZE
RPM
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
CFM
BHP
*HG
CFM
BHP
PE
RF
OR
MA
NC
E T
AB
LE
: R
OO
TS
Un
iver
sal U
RA
I
B-12X95October 2004
Copyright 2003 Dresser, Inc. All rights reserved. All information subject to change without notice.Dresser Design and Universal RAI® are registered trademarks of Dresser, Inc. ROOTSTM is a trademark of Dresser, Inc.
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 ROOTSHolmes OperationPO Box B7 Off St. Andrews RdTurnbridge, HuddersfieldEngland HD1 6RBPH: +44-1484-422222FX: +44-1484-423429
website: www.rootsblower.com • email: [email protected]
Dresser, Inc.
O
R
B
U
A
A
D1
D
BOTTOMSHAFT
TOPSHAFT
P
C
+ 000- 001
P
D2
O'
AX AX
INLET & DISCHARGE CONNECTIONS
RIGHT DISCHARGE
BOTTOM DISCHARGE
TOP DISCHARGE
LEFT DISCHARGE
Frame Sizes
HORIZONTAL CONFIGURATIONVERTICAL CONFIGURATION
22 5.13 5.00 9.75 3.75 6.25 3.75 9.63 6.88 6.25 9.25 5.00 .625 1.0 NPT 1.25 3224 5.13 7.00 11.25 3.75 6.25 3.75 9.63 6.88 6.25 9.25 5.00 .625 2.0 NPT 1.25 4332 7.25 7.25 6.75 11.25 5.00 8.50 5.00 5.81 12.81 8.88 7.75 12.13 6.75 .750 1.25 NPT 1.75 6933 7.25 7.25 7.63 12.13 5.00 8.50 5.00 6.25 12.81 8.88 7.75 12.13 6.75 .750 2.0 NPT 1.75 7436 7.25 7.25 10.00 14.63 5.00 8.50 5.00 7.56 12.81 8.88 7.75 12.13 6.75 .750 2.5 NPT 1.75 10242 8.00 8.00 7.25 13.00 6.25 10.25 6.25 6.86 15.06 10.63 8.75 13.63 8.25 .875 1.5 NPT 2.00 8845 8.00 8.00 10.00 15.50 6.25 10.25 6.25 8.00 15.06 10.63 8.75 13.63 8.25 .875 2.5 NPT 2.00 10947 8.00 8.00 11.75 17.63 6.25 10.25 6.25 9.25 15.06 10.50 8.50 13.63 8.25 .875 3.0 NPT 2.00 12853 10.50 10.50 8.38 15.38 6.25 11.25 6.75 8.18 17.38 11.88 10.25 17.25 8.75 1.125 .2.5 NPT 2.50 14356 10.50 10.50 11.00 18.00 6.25 11.25 6.75 9.19 17.38 12.25 11.00 17.25 8.75 1.125 4.0 NPT 2.50 17059 10.50 10.50 14.00 21.18 6.25 11.25 6.75 11.19 17.38 12.25 11.00 17.25 8.75 1.125 4.0 NPT 2.50 20465 11.00* 11.00 10.00 18.38 8.75 14.75 8.75 9.19 21.63 15.13 12.75 19.75 11.75 1.375 3.0 NPT 3.00 24568 11.00* 11.00 13.00 21.38 8.75 14.75 8.75 10.82 21.63 15.13 12.75 19.75 11.75 1.375 5.0 NPT 3.00 285
615 11.00* 11.00 20.00 28.38 8.75 14.75 8.75 14.32 21.63 16.25 15.00 19.75 11.75 1.375 .6.0 FLG 3.00 42576 14.00** 11.75 19.94 11.00 18.00 11.00 26.13 20.69 19.38 23.25 14.50 1.562 4.0 NPT 3.50 400
711 14.00** 16.75 25.19 11.00 18.00 11.00 26.13 19.50 17.00 23.25 14.50 1.562 6.0 NPT 3.50 530 718 14.00** 23.75 32.19 11.00 18.00 11.00 26.13 19.50 17.00 23.25 14.50 1.562 8.0 NPT 3.50 650
INLET Frame A A’ B C D D1 D2 M O O’ P P’ R U DISCH. AX WGT
*17.00 in horizontal configuration**21.00 in horizontal configuration