Model 496 Information

  • The Model 496 NFPA rated Gravimetric feeder is designed to meet your needs when feeding a pulverizer. It is designed with the operator in mind to give years of trouble free operation.
    Merrick's experience in the power industry and world-class expertise in electronic control systems have enabled us to design a truly unique coal feeder.

    The Model 496 is specifically designed for:

    • Performance – The Model 496 is engineered to provide cost effective operation at unparalleled accuracy of ± 0.25%
    • Reliability – Merrick feeders are designed and manufactured under the strictest guidelines using only the highest quality materials and components to maximize uptime.
    • Safety – Safety is always the top priority at Merrick. The Model 496 is tested to 100 psi, 2x the NFPA 85 criteria. Additionally, all internal electronics are either explosion-proof or intrinsically safe.
  • Body Shell and Feeder Construction

    • Rugged weldment with 1/4” thick carbon steel shell for longer life
    • 50 psi pressure integrity (NFPA 85)
    • 304 stainless steel in active flow areas to minimize corrosion
    • Large gasketed end and side access doors to facilitate easy feeder entry
    • Fixed leveling bar to maintain a constant material profile
    • Standard feeder inlet configurations:
      • 18” diameter for a 24” belt feeder
      • 24” diameter for a 36” belt feeder
      • 36” diameter for a 48” belt

    Clean-out Conveyor

    • Drag chain type conveyor thoroughly sweeps the floor of the feeder into the discharge chute to minimize coal and dust build-up.
    • The clean-out chain can be controlled in one of two different modes, either continuously or intermittently
    • The clean-out conveyor is driven by an AC motor with an integral high efficiency off-the-shelf gear reducer

    Conveyor Drive

    • The main conveyor drive is driven by an AC TENV motor with a VFD speed control
    • The direct drive, off-the-shelf high efficiency gear reducer is standard
    • A chain drive is optional


    • Externally regreasable head and tail pulley bearings for extended life
    • All idler rolls greased and sealed for life

    Weigh Suspension System

    • Dual hermetically sealed and barometrically compensated load cells
    • Simple to align, reducing maintenance costs
    • Calibration test weights

    Slack Belt/Positive Wrap Pulley

    • Use of large pulleys provides positive belt wrapping thereby eliminating the need for high tension on both sides of the belt
    • Longer belt and bearing life due to lower belt tension
    • Higher accuracy from reduced belt error

    Belt Scrapers

    • Two belt scrapers are used-one at the head pulley to clean the outside of the belt and the other, a V-plow scraper, to clean and disburse material from the inside of the belt
    • Scraper blades are made of a special, abrasion resistant material


    • Advanced MERRICK Genetix process controller is standard
    • Local mounting is standard for ease of operation
    • Touch screen interface
    • Optional dual encoders (drive motor and tail pulley) to detect belt slipping or breakage
  • For Spare parts for this model and more click here

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