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URAI®
ROTARY POSITIVE BLOWERS/EXHAUSTERS
B-12X95October 2004
En Chile: www.versol.cl [email protected]
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.
En Chile: www.versol.cl [email protected]
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
En Chile: www.versol.cl [email protected]
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
En Chile: www.versol.cl [email protected]
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
En Chile: www.versol.cl [email protected]
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.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
En Chile: www.versol.cl [email protected]
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
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117
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5.9
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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
IEn Chile: www.versol.cl [email protected]
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
En Chile: www.versol.cl [email protected]
