Universal RAI® Rotary Blowers

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.

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Features

Detachable steel mounting feet
Rigid one-piece cast iron casing
Anti-friction bearings
Thrust Control; Splash oil lubricated spur timing gears
Connections in standard pipe sizes
Straight, precision machined two-lobe impellers
Ground steel shafts

Engineering Resources

urai_drwg_pcurve_imp.pdf,
urai_drwg_vcurve_imp.pdf,
urai_drwg_dim_imp.pdf,
urai_drwg_dim_metric.pdf,
urai_drwg_assmbly_drwg.pdf,
urai_tab_partslist.pdf,

Warranty

The Warranty Policy and Procedure WP-5020 presents an exception condition to the standard General Terms of Sale, GTS-5001, warranty statement for the following products:URAI, URAI DSL, URAI-J and URAI-J DSL in gear diameters of 2-1/2 - 7 inch. RAM and RAM-J in gear diameters of 4-1/2 - 6 inch. RAM-X all models. RCS and RCS-J in gear diameters of 7 and 8 inch. EasyAir 8000 all sizes. EasyAir X2 models 50, 65, 100, 150, 200, 250 and 300.

wp_5020_rev7.pdf,

gts_5001_020107.pdf,

Operating Principle

Two figure-eight lobe impellers mounted on parallel shafts rotate in opposite directions. As each impeller passes the blower inlet, it traps a finite 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 defined, clearances. This allows operation without lubrication being required inside the air casing.

rotary_lobe_blwr_princ.pdf

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