36 Universal RAI (URAI) PD Blower Visit us online:

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1 Authorized Howden Roots Distributor, Warranty, Service & Repair Facility 36 Universal RAI (URAI) PD Blower Visit us online: Call for technical, application and sales support. The standard URAI blower features convenient grease lubrication on the drive end. The feet permit easy infield adaptation to either vertical or horizontal installation requirements and any of four drive shaft positions top, bottom, right or left hand. All frame sizes are centertimed to allow for rotation in either direction. All Universal RAI (URAI) series blowers are heavy duty rotary blowers in a compact, sturdy design engineered for continuous duty and maximum reliability. These blowers have a timetested lubrication system. Howden Roots exclusive figure8 gearbox design improves oil distribution to the timing gears and lengthens bearing life. This series features a grey iron casing, carburized and ground alloy steel spur timing gears secured to steel shafts with a taper fit and locknut, and grey iron involute impellers. Oversized antifriction bearings are used, with a heavy duty cylindrical roller bearing at the drive shaft to withstand Vbelt pull. Viton lip seals maintain proper lubricant at the bearings Detachable steel mounting feet Rigid one piece cast iron casing Connections in standard pipe sizes Straight, precision machined two lobe impellers Splash oil lubricated gears Carburized and ground alloy steel spur timing gears Anti Friction gears Ground steel shafts CenterTimed for rotation in either direction Specifications Flow Range To 330 CFM Max ΔPressure 7 PSI Max ΔVacuum 1 Hg Maximum RPM 3600 Minimum RPM 1090 Max ΔT 22ᵒF Connection Size 2. FPT Shaft Dia. 0.7 Min Sheave Dia. Drive End Lubrication Grease Gear End Lubrication Oil Oil Sump Gear End Horiz Config 16 oz Oil Sump Gear End Vert Config 8. oz Bare Unit Weight 76 lbs Shipping Weight 80 lbs Shipping Container Box Container Size (L x W x H) 17 x 16 x 12 Shipping Options Ground Freight, Air or Sea Also, available in: URAIDSL (Dual Splash Lube), URAIJ (WHISPAIR), URAIG (Gas), URAIJDSL and URAIMetric Equivalent to: Sutorbilt Model 3LP and Tuthill Model 3006* *Model size 3006 is supplied with a 7/8 diameter drive shaft. When replacing with a Roots model you will need to adjust your drive components to accommodate the 3/ drive shaft of the Roots blower Fraserwoods Fabrication & Machining Ltd Street, Acheson, Alberta, Canada T7X 6A T: +1(780) F: +1(780) E: SALES@fraserwoods.ca

2 Call for technical, application and sales support. Model No. / Drive Shaft Location Approximate Oil Sump Capacitates (left or right) (top or bottom) Gear End Approx. Oil Sump Capacities Fl. Oz. Liters These capacities are provided to assist stocking the correct amount of oil. Exact sump capacity may differ slightly. Review the proper filling instructions in OEM Manual. Recommended Oil Grades Ambient* Temp. ᵒF (ᵒC) ISO Viscosity No. Above 90ᵒ (32ᵒ) ᵒ to 90ᵒ (0ᵒ to 32ᵒ) 220 0ᵒ to 32ᵒ (18ᵒ to 32ᵒ) 10 Below 0ᵒ (18ᵒ) 100 *Ambient temperature is defined as the temperature of the space blower and drive are located. Parts List: 21/2 Gear Diameter Item Number Part Name Quantity 1 Headplate Gear End 1 2 Headplate Drive End 1 3 Gearbox 1 Timing Gears 2 CoverBind (plug Opening) 1 7 Gasket, Gear Box 1 11 Cylinder 1 12 Impeller & Shaft Drive 1 13 Impeller & Shaft Driven 1 1 Bearing, Ball 3 1 Bearing, Roller 1 Item Number Part Name Quantity 16 Pin, Dowel 17 Gear Nut 2 19 Key 1 21 Plug, Pipe 3 23 Screw Hex 6 2 Breather (Plug Vent) 1 26 Screw, Hex * 27 Seal, Lip Bearing 31 Screw, Hex, Nylock 32 Screw, Hex 6 33 Seal LipDrive 1 3 Clamp Plate 2 3 Foot 2 37 Fitting, Grease 2 38 Fitting, Relief 2 39 Washer Mounting 0 Screw Socket 2 2 Screw Hex Fraserwoods Fabrication & Machining Ltd Street, Acheson, Alberta, Canada T7X 6A T: +1(780) F: +1(780) E: sales@fraserwoods.ca

3 A B C D E F G F:\ FILE\ FORM\ DSIZE.GCM MFG. REF. 6 REF: EP938 FLATNESS ANGULARITY PARALLELISM TRUE POSITION STRAIGHTNESS 6 ÿ CONCENTRICITY PERPENDICULARITY PROFILE OF LINE PROFILE OF A SURFACE DIAMETER FINISH IN MICRO INCHES REVISIONS BY DATE 8 CHANGE NOTICE CHKD. 9 9 P DR. CHKD. P. DBV SCALE CAD FILE / DIRECTORY DATE 10 No. REQ'D. ALL DIMENSIONS SHOWN IN BRACKETS { } ARE MILLIMETERS 10 ORDER No. 11 PATT. No. PART No. DIMENSIONAL TOLERANCES UNLESS OTHERWISE SPECIFIED FINISHED DIMENSIONS TWO PLACE DECIMALS (.XX).01 FRACTIONAL1/6 THREE PLACE DECIMALS (.XXX) A B C D E F G NOTES: A INSTALL ITEM #20 (SCREW)IN ASSEMBLY PART NAME MAT'L. B SEE OPERATING MANUAL IRB180 FOR LUBRICATION INSTRUCTION C 21/2, 31/2, & " REQ'D SOC. HD. ON G.E. ONLY E REQ'D ON 22 & 2 ONLY F NUT TO BE TORQUED TO: 21/260 LB.FT. 31/2110 LB.FT. 190 LB.FT. 20 LB.FT. G FOR SIGHT GLASS UNITS ONLY. USE WASHER OUTSIDE OF GEARBOX. USE RED LOCTITE ON THE THREADS "F" "B" "A" (DO NOT DRILL THRU) 20 SEE TABLE "E" 9 0 "G" "C" SIZE 31/2 21/2 J "X" ADD LIFTING LUG ITEM# 6 RK 0/1/02 T122 AGP CONFIDENTIAL THIS DOCUMENT CONTAINS CONFIDENTIAL INFORMATION OF ROOTS DIVISION, DRESSER INDUSTRIES, INC. IT SHALL BE HELD IN STRICTEST CONFIDENCE, AND BE USED ONLY IN CONJUNCTION WITH ROOTS DIVISION BUSINESS. H RK 01/1/02 G DELETED ITEM 1 VC 0/30/01 F REVISED PER ECN JHB E JHB D ITEM 2 REVISED PER 903 REM 87 ECN 3339V 319 C LUBRICATION NOTE B REVISED REM 87 REDRAWN DB B ITEM #2 MOVED RM A REV PER ECN RM 8786 ADD ITEM# FOR SIGHT GLASS UNITS INCREASED GEAR NUT TORQUE BDR #27 T1 380V V AGP M c C RM FR /PARTS/XXAS FULL DO NOT SCALE FOR DIMENSIONS SECTIONAL ASSEMBLY 21/2 THRU " URAI BLOWERS TER BORE GEARS H REV J

4 Frame Size 36 URAI Speed RPM PSI PSI 6 PSI 7 PSI 8 PSI 9 PSI 10 PSI 12 PSI 13 PSI 1 PSI 1 PSI VACUUM DATA CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP INHGV CFM BHP Universal RAI (URAI) Dimensions GD A B C D D E MIN E MAX F MIN F MAX G H K M N O O P R U KEYWAY W NPT. V AA AB AD AE AF X.09 21/ Fraserwoods Fabrication & Machining Ltd Street, Acheson, Alberta, Canada T7X 6A T: +1(780) F: +1(780) E: sales@fraserwoods.ca

5 \ PRESSURE PERFORMANCE MAX. PRESSURE RISE = 7.3 PSI / MAX. SPEED = 3600 RPM PERFORMANCE BASED ON AIR, 1.7 PSIA & 68ᵒF VACUMM PERFORMANCE MAX. VACUUM RISE = 1 Hg / MAX. SPEED = 3600 RPM PERFORMANCE BASED ON AIR, 68ᵒF DISCHARGE PRESSURE = 30 Hg ABS Fraserwoods Fabrication & Machining Ltd Street, Acheson, Alberta, Canada T7X 6A T: +1(780) F: +1(780) E: sales@fraserwoods.ca

6 S PECIFICATIONS ROOTS TM UNIVERSAL RAI ROTARY POSITIVE BLOWERS Frames 22 thru 718 BASIC BLOWER DESCRIPTION Universal RAI blowers are heavyduty rotary blowers designed with detachable rugged steel mounting feet that permit easy, infield adaptability to vertical or horizontal installation requirements. Because of the detachable mounting feet, these units can be easily adapted to any of four drive shaft positions: right, left, bottom, or top. The compact, sturdy design is engineered for continuous service when operated in accordance with speed and pressure ratings. The basic model consists of a cast iron casing, carburized and ground alloy steel spur timing gears secured to steel shafts with a taper mounting and locknut, and cast iron involute impellers. Oversized antifriction bearings are used, with a cylindrical roller bearing at the drive shaft to withstand Vbelt pull. The Universal RAI features splash oil lube on the gear end and grease lube on the drive end. ROOTS exclusive figureeight gearbox design improves oil distribution to maximize gear and bearing life. After testing, the unit is sprayed with a protective paint, and boxed or skid mounted for delivery. Available accessories include driver, relief valve, inlet and discharge silencers, inlet filter, check valve, extended base, Vbelt or flexible coupling and drive guards. OPERATING PRINCIPLE INLET & DISCHARGE CONNECTIONS C M P TOP DISCHARGE P AX AX TOP SHAFT O R B U 001 BOTTOM SHAFT D1 D LEFT DISCHARGE VERTICLE CONFIGURATION A D2 A BOTTOM DISCHARGE RIGHT DISCHARGE HORIZONTAL CONFIGURATION INLET Frame A A B C D D1 D2 M O O P P R U DISCH. AX WGT 22U NPT U NPT U NPT U NPT U NPT U NPT U NPT U NPT U NPT U NPT U NPT U NPT U NPT U FLG U NPT U FLG U FLG O' Two figureeight lobe impellers mounted on parallel shafts rotate in opposite directions. As each impeller passes the blower inlet, it traps a definite volume of air and carries it around the case to the blower outlet, where the air is discharged. With constant speed operation, the displaced volume is essentially the same regardless of pressure or temperature. Timing gears control the impellers relative positions and maintain small but definite clearances. This allows operation without lubrication requirements inside the unit casing. S12K8 September 2003

7 Copyright 2003 Dresser, Inc. All rights reserved. Dresser Design and Universal RAI are registered trademarks of Dresser, Inc. ROOTS TM is a trademark of Dresser, Inc. All information subject to change without notice. website: ROOTS@dresser.com S12K8 September 2003 Dresser ROOTS 213 Hwy 6 South Houston, TX Ph: Fx: Toll Free (US): ROOT(S) Dresser ROOTS Connersville 900 West Mount Street Connersville, IN 7331 Ph: Fx: Dresser ROOTS Holmes Operation PO Box B7 Off St. Andrews Rd Turnbridge, Huddersfield England HD1 6RB Ph: Fx: Frame PSI PSI 6 PSI 7 PSI 8 PSI 9 PSI 10 PSI 12 PSI 13 PSI 1 PSI 1 PSI VACUUM DATA Size Speed CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP INHGV CFM BHP NOTES: 1. Performance based on inlet air at standard pressure of 1.7 psia, standard temperature of 68º F, and specific gravity of Vacuum ratings based on inlet air at standard temperature of 68º F, discharge pressure of 30 Hg and specific gravity of 1.0. DESIGN AND CONSTRUCTION FEATURES 3. Antifriction bearings 6. Ground steel shafts 1. Detachable steel mounting feet. Splash oil lubricated spur timing gears 7. Straight, precision machined twolobe impellers 2. Rigid onepiece cast iron casing. Connections in standard pipe sizes