Document baMnRGwbeyqL3vYprq8qdVyqo

Air System Equipment Fans "<* biowot ROBBINS & MYERS, INC. PROPELLAirDiv.'______ 1947 Clark Boulevard SPRINGFIELD, OHIO HEAVY-DUTY INDUSTRIAL VENTILATING EQUIPMENT Omen m Pbxncxpai. Cities For Ducts, Walls, Win dows, Hoods, Roof Venti lators Propellair Direct- Connected Fans For use wherever motors may operate within the air stream, from free air to medium and relatively high resistance. A compact, durable design with fan having two to six blades. Sizes: 12 in. to 60 in. Capacities: 1,020 to 85,000 cfm. Type "CD" and "QD" Quiet Fans. For Heat, Acids, Alka lies--Fumes, Gases, Dust Belt-Driven Propellair Tube-Axial Type A complete fan unit in a short section of heavy gage duct. Simple installation. Available in 16 in. through 60 in. sizes from to 30 hp. Use Type "BT" or larger Type "CS" for all applications where the motor must be kept out of the air stream. Cast iron bearing assembly housings and gas-tight belt tubes provide complete protection. 1,900 to 78,000 cfm. Rugged Propellair centrifugal fans are designed for general ventilation, materi als handling, high temperatures, high pressures, fumes and gases. They are available with forward curved, backward inclined or radial blade wheels. Sizes range from 7^-in. to 33-in. wheel diam eters. Air deliveries to 19,070 cfm. Power Roof Ventilator Propellair Sky-Blast Dependable and economical power roof ventilators. Butterfly dampers open wide the instant fan is started, close automatically as fan coasts to a stop, offer virtually zero resistance as heat, fumes, moisture, dust shoot high into air. Rain is prevented from entering by fan when operating. Drainage shed pre vents leakage when dampers are closed. Sizes: 16 in. to 60 in. Capacities: 2.800 to 78,000 cfm. Airfoil Principle Entrance Ring A compact, highly efficient pressure fan using standard steel drum sections Airfoil-Section Blades incorporating standard NEMA frame motors in direct drive models. Also available in belt-driven ratings with motor outside the air stream. Cast alu minum airfoil propeller and guide vanes for maximum efficiency and durability. Available in 20, 24, 30, 36, 48, and 60 in. diameters in belt and direct driven models. Capacities from 3,410 to 85,000 cfm. Propellair fans have airfoil-section blades with variations of pitch, curva ture, and thickness to compensate fr different lineal speeds of points at yarJous radii. Air movement is unifor:^ over whole fan area. The Propeu*^. curved entrance ring eliminates ydaj;^ currents; helps efficient Propellair bladej \ deliver highest pressure ana volume* M*v- 210 Air System Equipment and Blowers Unit-Fans, Inc. 1001 Saint Charles Ave., New Orleans, La. Manufacturers of Industrial, Direct-Drive Axial Flow Fans, Belt-Drive Exhaust Fans, Window Fans, Attic Fans and Portable Air Circulators 1. ROOF VENTILATORS MUSHROOM TYPE COMMERCIAL RATING: Blade Diam --12 in. to 36 in.--sheet metal blades. Air deliveries to 12,000 cfm, static pres sure to in. INDUSTRIAL RATING: Blade Diam-- 12 in. to 60 in.--cast aluminum blades. Air deliveries to 65,000 cfm, static pres sures to 2 in. SKY BLAST TYPE: Blade Diam--21 in. to 60 in.--cast aluminum blades. Air deliveries to 75,000 cfm, static pressure to in. wg. Blade Diam--9 in. to 60 in. Air Di liveries to 100,000 cfm. Static Pressuri to 3 in. wg. 3. BELT DRIVE TUBEAXIAL FANS Blade Diam--12 in. to 60 in. Air De liveries to 75,000 cfm. Static Pressures to 4)6 in. wg. 4. DIRECT DRIVE TUBEAXIAL FANS Blade Diam--12 in. to 60 in. Air De liveries to 75,000 cfm. Static Pressures to 6 in. wg. ~u. juupeuers are of cast aluminum. Air Foil section of an unusual design which permits variation in both number of paddles and angle of attack. This unique feature makes it possible to tailor the fan to any exact air moving requirement within the ranges indicated. 211