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

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1 Authorized Howden Roots Distributor, Warranty, Service & Repair Facility 65 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 in-field 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 center-timed 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 time-tested lubrication system. Howden Roots exclusive figure-8 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 anti-friction bearings are used, with a heavy duty cylindrical roller bearing at the drive shaft to withstand V-belt 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 Center Times for rotation in either direction Specifications Flow Range To 526 CFM Max ΔPressure 15 PSI Max ΔVacuum 16 Hg Maximum RPM 2350 Minimum RPM 663 Max ΔT 250ᵒF Connection Size 3 FPT Shaft Dia Min Sheave Dia. 8 Drive End Lubrication Grease Gear End Lubrication Oil Oil Sump Gear End Horiz Config 52 oz Oil Sump Gear End Vert Config 28.3 oz Bare Unit Weight 245 lbs Shipping Weight 3058 lbs Shipping Container Box Container Size (L x W x H) 32 x 29 x 31 Shipping Options Ground Freight, Air or Sea Also, available in: URAI-DSL (Dual Splash Lube), URAI-G (Gas) and URAI-Metric Equivalent to: Sutorbilt Model 6HP and Tuthill Model 6005

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) 150 Below 0ᵒ (-18ᵒ) 100 *Ambient temperature is defined as the temperature of the space blower and drive are located. Parts List: 6 & 7 Gear Diameter Item Number Part Name Quantity 1 Headplate Gear End 1 2 Headplate Drive End 1 3 Gearbox 1 4 Timing Gears 2 5 Cover-Bind (plug Opening) 1 7 Gasket, Gear Box 1 11 Cylinder 1 12 Impeller & Shaft Drive 1 13 Impeller & Shaft Driven 1 14 Bearing, Ball 3 15 Bearing, Roller 1 Item Number Part Name Quantity 16 Pin, Dowel 4 17 Gear Nut 2 19 Key 1 21 Plug, Pipe 3 23 Screw Hex Nylock 8 25 Breather (Plug Vent) 1 26 Screw, Hex * 27 Seal, Lip Bearing 4 29 Washer, Spring Wavy 2 31 Screw, Hex, Nylock 4 32 Screw, Hex Seal Lip-Drive 1 34 Clamp Plate 2 35 Foot 2 37 Fitting, Grease 2 38 Fitting, Relief 2 39 Washer Mounting 4

3 Assembly of UNIVERSAL RAI Blowers, 6" and 7" Diameter

4 Frame Size 65 URAI Speed RPM PSI 5 PSI 6 PSI 7 PSI 8 PSI 9 PSI 10 PSI 12 PSI 13 PSI 14 PSI 15 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 A B C D E E F G J K L M N O O P R U V KEYWAY W W AA AB AD AE AF AG X NPT 3 NPT

5 \ PRESSURE PERFORMANCE MAX. PRESSURE RISE = 15 PSI / MAX. SPEED = 2350 RPM PERFORMANCE BASED ON AIR, 14.7 PSIA & 68ᵒF VACUMM PERFORMANCE MAX. VACUUM RISE = 16 Hg / MAX. SPEED = 2350 RPM PERFORMANCE BASED ON AIR, 68ᵒF DISCHARGE PRESSURE = 30 Hg ABS.

6 S PECIFICATIONS ROOTS TM UNIVERSAL RAI ROTARY POSITIVE BLOWERS Frames 22 thru 718 BASIC BLOWER DESCRIPTION Universal RAI blowers are heavy-duty rotary blowers designed with detachable rugged steel mounting feet that permit easy, in-field 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 V-belt pull. The Universal RAI features splash oil lube on the gear end and grease lube on the drive end. ROOTS exclusive figure-eight 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, V-belt 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 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 figure-eight 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. S-12K84 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 S-12K84 September 2003 Dresser ROOTS 2135 Hwy 6 South Houston, TX Ph: Fx: Toll Free (US): ROOT(S) Dresser ROOTS Connersville 900 West Mount Street Connersville, IN Ph: Fx: Dresser ROOTS Holmes Operation PO Box B7 Off St. Andrews Rd Turnbridge, Huddersfield England HD1 6RB Ph: Fx: Frame 4 PSI 5 PSI 6 PSI 7 PSI 8 PSI 9 PSI 10 PSI 12 PSI 13 PSI 14 PSI 15 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 14.7 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. Anti-friction bearings 6. Ground steel shafts 1. Detachable steel mounting feet 4. Splash oil lubricated spur timing gears 7. Straight, precision machined two-lobe impellers 2. Rigid one-piece cast iron casing 5. Connections in standard pipe sizes