68 Universal RAI-G PD Blower Visit us online:

Transcription

1 Authorized Howden Roots Distributor, Warranty, Service & Repair Facility 68 Universal RAI-G PD Blower Visit us online: Call for technical, application and sales support. URAI gas blowers feature mechanical seals and Viton o-rings. The seal system is designed to meet or exceed gas industry safety standards, including provisions for purge gas in the headplates. The URAI gas blower uses detachable steel mounting feet for adaptation of drive shaft position to meet vertical or horizontal installation requirements. 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 Mechanical Seals 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 and ground steel shafts Center-Timed for rotation in either direction Specifications Flow Range To 845 CFM Max ΔPressure 14 PSI Max ΔVacuum 16 Hg Maximum RPM 2350 Minimum RPM 636 Max ΔT 240ᵒF Connection Size 5 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 285 lbs Shipping Weight 335 lbs Shipping Container Wood Skid Container Size (L x W x H) 32 x 29 x 31 Shipping Options Ground Freight, Air or Sea Also, available in: URAI, URAI-DSL (Dual Splash Lube) and URAI-Metric

2 Call for technical, application and sales support. Model No. / Drive Shaft Location 68 URAI-G Approximate Oil Sump Capacitates 68 URAI-G (left or right) 68 URAI-G (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. 68 URAI-G 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 7* Gasket DE Cover 1 11 Cylinder 1 12 Impeller & Shaft Drive 1 13 Impeller & Shaft Driven 1 14 Bearing, Ball 3 Item Number Part Name Quantity 15 Bearing, Roller 1 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 14* 27 Seal, Bearing 4 31 Screw, Hex 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 40 Screw Socket 2 42 Screw Hex 2 43 Plug 8 51 Shoulder Bolt 2 53 Oil Sight Glass 2

3 Assembly of UNIVERSAL RAI Series Gas Blowers, 6" Gear Diameter

4 Frame Size 68 URAI- G Speed RPM PSI 2 PSI 3 PSI 4 PSI 5 PSI 6 PSI 7 PSI 8 PSI 10 PSI 11 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 CFM BHP CFM BHP CFM BHP *HG CFM BHP Universal RAI-G 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 5 NPT

5 \ PRESSURE PERFORMANCE 68 URAI MAX. PRESSURE RISE = 14 PSI / MAX. SPEED = 2350 RPM PERFORMANCE BASED ON AIR, 14.7 PSIA & 68ᵒF VACUMM PERFORMANCE 68 URAI MAX. VACUUM RISE = 16 Hg / MAX. SPEED = 2350 RPM PERFORMANCE BASED ON AIR, 68ᵒF DISCHARGE PRESSURE = 30 Hg ABS.

6 SPECIFICATIONS ROOTS Universal RAI -G Rotary Positive Gas Blowers Frames 32 thru 615 BASIC BLOWER DESCRIPTION Universal RAI -G gas blowers are heavy duty rotary blowers designed with mechanical seals. The detachable rugged steel mounting feet, permit adaptability to either vertical or horizontal installation requirements. 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 anti-friction bearings are used, with a cylindrical roller bearing at the drive shaft to withstand V-belt pull. The Universal RAI -G features splash oil lube on the gear end and grease lube on the drive end. Accessories are available through our distributors. ROOTS Synthetic Oil and grease is recommended to maintain warranty. OUTLINE DRAWING & DIMENSIONAL TABLE C INLET & DISCHARGE CONNECTIONS TOP SHAFT P TOP DISCHARGE P AX AX DESIGN AND CONSTRUCTION FEATURES 1. Mechanical seals 2. Rigid one-piece cast iron casing 3. Anti-friction bearings 4. Splash oil lubricated spur timing gears 5. Connections in standard pipe sizes 6. Straight, precision machined two-lobe impellers 7. Ground steel shafts 8. Detachable steel mounting feet OPERATING PRINCIPLE O' O R U D1 D D2 B BOTTOM SHAFT VERTICLE CONFIGURATION LEFT DISCHARGE A A BOTTOM DISCHARGE RIGHT DISCHARGE HORIZONTAL CONFIGURATION Drive Shaft Approx. Frame A B C Location O O P P R U Keyway Inlet & AX Net Wt. Size D D1 D2 Disch.Dia (lbs.) x NPT x NPT x NPT x NPT x NPT x NPT x NPT x NPT x NPT * x NPT * x NPT * x FLG 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 gas and carries it around the case to the blower outlet, where the gas is discharged. With constant speed operation, the displaced volume is essentially the same regardless of pressure, temperature or barometric pressure. Timing gears control the relative position of the impellers to each other and maintain small but definite clearances. This allows operation without lubrication being required inside the gas casing. S-60A01

7 2002 Dresser, Inc. ROOTS is a trademark of Dresser, Inc. Dresser Design and Universal RAI are registered trademarks of Dresser, Inc. website: ROOTS@dresser.com S-60A01 December 2002 Dresser ROOTS 2135 Hwy 6 South Houston, TX PH: FX: Toll Free: 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: Dresser, Inc. PERFORMANCE TABLE FRAME SPEED 1 PSI 2 PSI 3 PSI 4 PSI 5 PSI 6 PSI 7 PSI 8 PSI 10 PSI 11 PSI 12 PSI 13 PSI 14 PSI 15PSI Max. Vacuum 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 Notes: 1. Performance based on inlet methane at standard pressure of 14.7 psia, standard temperature of 68 F, and specific gravity of Vacuum ratings based on inlet methane at standard temperature of 68 F, discharge pressure of 30 Hg and specific gravity of 0.55.