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URAI-22 FLOW EQUALIZATION TANK BLOWER URAI-33 MAIN PLANT BLOWERS ROOTSTM Universal RAI Rotary Positive Blowers Frames 22 thru 718 OPERATING PRINCIPLE POSITION 1 POSITION 2 POSITION 3 POSITION 4 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, 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. OUTLINE DRAWING & DIMENSIONAL TABLE INLET 8 DISCHARGE CONNECTIONS TOP DISCHARGE C P_ - P I TOP AXA% SHAFT I o 7 R .,000 01 T . ��/I ,� O BOTTOMM�1� A L SHAFT I BOTTOM DISCHARGE LEFT DISCHARGE J RIGHT DISCHARGE VERTICAL CONFIGURATION HORIZONTAL CONFIGURATION Drive Shdt FmmeA B C Locdlan 0 U P P, R U Sim D D1 D2 K Inld d disch.0ie. ApproX Nd VW. Obs.) 22 5.13 5.00 9.75 3.75 6.25 3.75 9.63 6.88 1 6.25 1 9.25 1 5.00 .625 .188 x .094 1.0 NPT 1.25 32 24 5.13 7.00 11.75 3.75 6.25 3.75 9.63 6.88 1 6.25 1 9.25 1 5.00 .625 .188 x.094 2.0 NPT 1.25 43 32 7.25 6.75 11.25 5.00 8.50 5.00 1281 8.88 1 7.75 12131 6.75 ,750 .188 z .094 1.25 PPT 1.75 69 33 1 7.25 7.63 12.13 5.00 8.50 5.00 12.81 8.88 7.75 12131 6.75 .750 .188 x .094 2.0 NPT 1.75 74 36 7.25 1 10.001 14.63 5.00 8.50 5.00 12.81 8.88 7.75 12.13 6.75 .750 .186 x .094 2.5 NPT 1.75 102 42 8.00 1 7.25 1 13.00 625 10.25 6.25 15.06 10.63 8.75 Q 631 8.25 .875 .188 x .094 1.5 PPT 2.00 88 45 8.00 10.00 15.50 625 10.25 6.25 15.06 10.63 8.75 1363 8.25 .875 .188 x .094 2.5 NPT 2.00 109 47 8.00 11.75 17.63 6.25 10.25 6.25 15.06 10.50 8.50 13.63 8.25 1 .875 .0% 3.0 NPT 2.00 128 53 10.50 8.38 15.38 6.25 11.25 6.75 17.38 11.88 10.25 1225 8.75 1.125.125 2.5 PPT 2.50 143 56 10.50 11.00 18.00 6.25 11.25 6.75 17.38 12.25 11.00 17.25 8.75 1.125.125 4.0 NPT 2.50 170 59 10.50 14.00 21.18 625 11.25 6.75 17,38 12.25 11.00 17.25 8.75 1.125.125 4.0 NPT 2.50 W374 204 1275 19.75 11.75 1.375.156 65 11.00* 10.00 18.38 8.75 14.75 8.75 21.63r1625 3.0 NPT 3.00 245 68 11.00' 13.00 21.38 8.75 14.75 8.75 21.63 12.75 19.75 11.75 1.375.156 5.0 NPT 3.00 285 11.00' 20.00 28.38 8.75 14.75 8.75 21.63 15.00 19.75 11.75 1.375156 6.0 FLG 3.00 425 14.00" 11.75 19.94 11.00 18.00 11.00 26.13 19.38 23,25 14.50 1.562.186 4.0 PPT 3.50 400 14.00" 1675 25.19 1100 1800 11.00 26.13 17.00 2325 14.50 1.562 M .375 x .188 6.0 FLG 3.141M-123.75132.19111.00 18.00 11.00 26.13 17.00 23.25 14.50 1.562 .315 x .168 8.0 FLG 3.50 650 S -12K84 BASIC BLOWER DESCRIPTION Universal RAI blowers are heavy duty rotary blowers designed with detachable rugged steel mounting feet, which permit easy in -field adaptability to either 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 hand, left hand, 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 thrust control, with splash oil lube on the gear end and grease lube on the drive end. After standard tests, the unit is sprayed with a protective paint and boxed or placed on skids. Available accessories include driver, relief valve, inlet and discharge silencer, inlet filter, check valve, extended base, V -belt or flexible coupling and drive guards. DRESSER Roots P6018 West Lane MHP 10 23