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Iso-Flo® Size Grader

Key’s Iso-Flo® Size Graders have been the industry standard for over 10 years. They are available in more designs and options, for more product applications, than any other grader. Cost-effective, versatile, sanitary, and quiet, Iso-Flo® size graders also have the lowest maintenance costs in the industry—about one-third the cost for competing graders.

Today, more than 25,000 Iso-Flo units are in use worldwide. Smart Shaker® advancements including real-time SmartArm® monitors, StrongArm™ spring arms, Forté™ controls and Predictive Maintenance programs provide up-to-the-minute opportunity for even more efficiency and long life.  This global record of superior reliability is backed by Key’s industry-leading
5-year warranty on all Iso-Flo conveyors, maximizing long-term return on your investment.

Click here to learn about our online and instructor-led training courses for Iso-Flo® Size Graders.

Select an Iso-Flo® Size Grader for Unsurpassed Capacity and Reliability Key Technology Introduces Five-Year Warranty on Iso-Flo® and Impulse™ Vibratory Conveyors Destined for Customers in Europe, Africa, and the Middle East Iso-Flo® Size Graders Versatility Allows for Installation on Mezzanines and Decks

Features and Benefits

Higher Capacities

  • Two-deck, 11-screen grader:       
        · 13,608 kg/h (30,000 lb/hr) of wet product
        · 10,433 kg/h (23,000 lb/hr) of frozen product  
  • Three-deck, 14-screen grader:     
         · 16,783 kg/h (37,000 lb/hr) of wet product and 13,154 kg/h (29,000 lb/hr) of frozen product    

         · Capacities vary depending on product and product condition


  • Install on mezzanines and decks
  • More designs and options
  • More product applications
  • More screen combinations and number of screens
  • 1219 mm, 914 mm, and 610 mm (48", 36" and 24") wide

More Screen Area

  •  Larger selection of screens per deck
  •  1219 mm (48") width—more square feet of grading


  •  Single beam frames
  •  Sanitary screen designs
  •  Easy, quick access for cleanup


    Vibratory Reference Information


    Common Vibratory Elements

    Key Technology | 150 Avery Street, Walla Walla, WA 99362 USA