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24-1/2", Unassembled Downblast Ventilator, Belt-Drive

  • Item # 7AF20
  • My Part #
  • Mfr. Model # 7AF20
  • Catalog Page # 3026
  • UNSPSC # 40101503
Downblast Vent,Belt Drive,24-1/2 In close
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  • Shipping Weight 156.85 lbs.
Country of Origin Varies Country of Origin is subject to change.
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Product Details

Hazardous Location Centrifugal Belt-Drive Exhaust Ventilators

• Aluminum, backward inclined, nonoverloading centrifugal wheel design Air handling-quality bearings meet min. L10-100,000 hr.
Designed to exhaust air in commercial and industrial applications with potentially hazardous particles or fumes. Constructed with spark-resistant aluminum wheel and rub ring. Spun aluminum housing features rolled wind band to increase stability. Motor, drive frame, and wheel are isolated from the mounting base by independent neoprene studs—no metal-to-metal contact, greatly reducing overall noise. Motor compartment is cooled by fresh outside air, maximizing motor life. Motors, sheaves, belts, and conduit kit are packed separately when unassembled ventilator with drive package is ordered.
Warning: Nonhazardous location ventilators are not interchangeable with hazardous location ventilators. Note: Installation must comply with all local and national safety codes including the National Electrical Code (NEC) and National Fire Protection Act (NFPA).
Downblast Ventilators

• Motor only UL Listed for Class I Groups C & D and Class II Groups E, F, & G hazardous locations Max. inlet air temp.: 180°F Bearings—sealed pillow block up to 16-3/4" wheel dia.; regreasable pillow block for 18-1/2" wheel dia. and larger

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Technical Specs

  • Drive Type - Roof Ventilators Belt Drive
  • Duty Rating - Roof Ventilators Hazardous Location
  • Drive Package With Motor Included Yes
  • Voltage - Roof Ventilators 230/460
  • Motor HP - Roof Ventilators 1/3
  • Base Square Size - Roof Ventilators 34" x 34"
  • Number of Speeds 1
  • Mounting Location - Roof Ventilators Roof
  • Wheel Dia. 24-1/2"
  • Item - Roof Ventilators Downblast Ventilator
  • CFM @ 0.000-In. SP 4637
  • CFM @ 0.125-In. SP 4242
  • CFM @ 0.250-In. SP 3761
  • CFM @ 0.375-In. SP 3060
  • Sones @ 0.125-In. SP @ 5 Ft. 7.5
  • Sones @ 0.250-In. SP @ 5 Ft. 6.9
  • Sones @ 0.500-In. SP @ 5 Ft. 6.1
  • Phase 3
  • Hz 60
  • Max. Operating Amps 1.2/0.6
  • Max. BHP 0.35
  • RPM 505
  • Base Height 1-3/4"
  • Overall Dia. 42-3/4"
  • Overall Height 38-3/8"
  • Shaft Dia. Wheel End 1"
  • Max. Inlet Temp. 180 Degrees
  • Housing Material Spun Aluminum
  • Wheel Material Aluminum
  • Wheel Type Backward Inclined Centrifugal
  • Speed Controllable No
  • Adj. 12 3/8"H Roof Curb Stock No. 2ZV84
  • Adj. 6 3/8"H Roof Curb Stock No. 4C455
  • Assembled/Unassembled Unassembled
  • Recommended 12 In. Fixed Curb Item No. 2RB80
  • Recommended 8 In. Fixed Curb Item No. 4HX42
  • Agency Compliance UL/cUL 705, AMCA Sound & Air
  • Dimension A 34"
  • Dimension B 42-3/4"
  • Dimension C 38-3/8"
  • Dimension D 5-3/4"
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Compliance and Restrictions

  • This item is restricted for international sale.

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