Weight dosing feeder MD & MDL

gravimetricbeltcoal powder

Product overview
Thayer Scale MD and MDL weigh belt feeders are engineered for heavy-industry bulk handling. The MD covers a broad flow range while the MDL is optimized for lower flows. Units support gravimetric flow measurement, totalizing, and closed-loop feed control for constant or variable set points.

Model specifications (table)
Model: MD / MDL
Belt widths available: 18 in, 24 in, 30 in, 36 in, 42 in, 48 in, 54 in
Approx. flow rate range (STPH): 2–400
Material density range (lbs/ft³): 10–200
Maximum particle size (in): 0.25–4
Scale loading (lbs/ft): 30–270
Load cell type: Strain gauge / LVDT
Typical materials: soybeans, coal, sand, clay, limestone, bentonite, corn, wet DDG, sinter, fiberglass, iron ore, nickel shot, sludge, TiO2, cement

Industry applications

• Cement: limestone, shale, clay, oyster shells, coral, iron
• Steel: iron ore pellets, limestone, dolomite, coke, coal
• Ethanol: whole and ground corn, starch, germ, soybean
• Power & energy: coal, gypsum, limestone, fly ash
• Aggregate & mining: iron, copper, zinc ores
• Fertilizer: potash, phosphate, ammonium nitrate prills, diammonium phosphate
• Aluminium: petroleum coke, bauxite, alumina

Core technologies

• FMSS™ Force Measurement Suspension System to separate net load from extraneous forces for improved vibration and shock immunity.
• Head pulley drive for consistent belt tension and improved measurement accuracy with simplified maintenance.
• Tail-pulley-mounted speed encoder for true belt speed measurement and slippage/break detection.
• External scale placement option to locate weighing components outside the material flow path for reduced tare and easier cleaning.
• Custom-engineered inlet profiles to ensure uniform material withdrawal and high efficiency at low power consumption.
• Optional automated test weight positioning for safe, verifiable remote calibration.
• Individually mounted idlers to enable maintenance without emptying the conveyor.
• Full-length adjustable skirtboards, tapered and flared to minimize spillage and particle jamming.

Key benefits

• Designed for heavy-duty service: suited to abrasive, corrosive and high-vibration environments originally specified for cement and steel mills.
• Reduced operating cost: enclosed and durable designs limit housekeeping and maintenance needs.
• Accurate gravimetric measurement: measures true material load independent of belt tension, load position, idler friction or buildup.
• Installation flexibility: open or enclosed construction, inclined/declined conveyance and compact or space-constrained sites.
• Configurable for application: options for hazardous areas, corrosive/abrasive materials, dust control and scavenging.

Technical specifications

• Models: MD and MDL
• Belt widths: 18 in, 24 in, 30 in, 36 in, 42 in, 48 in, 54 in
• Flow rate (MD): approx. 2–400 STPH (MDL optimized for lower end)
• Material density: 10–200 lbs/ft³
• Max particle size: 0.25–4 in
• Scale loading: 30–270 lbs/ft
• Load cell: Strain gauge / LVDT
• Typical materials and applications: cement, steel, ethanol, power & energy, aggregate & mining, fertilizer, aluminium, and other heavy-industry uses