Industrial Grade Permanent Magnet

Hopper Magnets Supplier in Pakistan

High-intensity neodymium grate magnets and drawer grids engineered for injection moulding machines, grain hoppers, and powder feed chutes across Pakistan.

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Overview & Industrial Engineering Summary

Hopper magnets—also widely recognized as magnetic grates, hopper grids, or grate separators—are precision magnetic filtration assemblies designed to be positioned inside material feed hoppers, hopper dryers, vertical chutes, and intake openings. Faisal Magnets supplies high-intensity stainless steel hopper magnets throughout Pakistan to protect critical production equipment such as plastic injection screws, extruders, pulverizers, and grain rollers from destructive tramp iron contamination.

Technical Specifications & Quality Parameters

Verified factory specifications for engineering and procurement planning.

Hopper Magnets Technical Data

Faisal Magnets Quality Matrix

Tube & Frame Material	AISI 304 or 316L Food/Pharma Grade Stainless Steel (Fully Welded)
Surface Magnetic Flux	8,000 Gauss to 12,500 Gauss (Certified Surface Intensity)
Available Geometries	Round / Circular Grate, Square Grid, Rectangular, or Drawer Enclosure
Magnetic Core	High-Energy Sintered Neodymium (NdFeB) Rare-Earth Alloy
Standard Diameters (Round)	150mm (6"), 200mm (8"), 250mm (10"), 300mm (12"), 350mm (14"), 400mm (16")
Standard Dimensions (Square)	150x150mm, 200x200mm, 250x250mm, 300x300mm, 400x400mm, 500x500mm
Thermal Rating	Standard up to 80°C; High-Heat SH/UH options rated up to 120°C–150°C
Cleaning Format	Manual wipe-down or quick-clean stainless steel pull-off outer sleeves

Major Commercial & Manufacturing Applications

Where hopper magnets are widely implemented across Pakistani industries:

✓ Placed inside feed hoppers and hopper dryers of plastic injection moulding and blow moulding machines
✓ Protecting precision injection screws, heated barrels, and hot-runner moulds from regrind screws and metal fragments
✓ Grain, paddy, flour, and spice intake hoppers intercepting nails, wire, and field debris
✓ Chemical, mineral, and pharmaceutical powder hoppers preventing ferrous contamination in compound blending
✓ Feed mills and agricultural grain chutes protecting hammer mills and pellet presses

Key Selection & Engineering Considerations

• Geometric fit: Round hopper magnets fit conical machine hoppers and dryer bases, while square or rectangular grates fit machine feed throats and vertical bins.
• Surface Gauss rating: 8,000 to 10,000 Gauss is ideal for standard tramp iron (screws, nails, washers); 11,000 to 12,000+ Gauss is recommended for microscopic metal fuzz and work-hardened stainless steel particles.
• Operating temperature tolerance: Standard neodymium grates operate reliably up to 80°C. For heated hopper dryers running at 90°C to 130°C, high-temperature NdFeB (H or SH grades) or ceramic ferrite must be specified.
• Cleaning mechanism: Standard grates are manually wiped; easy-clean sleeve designs allow operators to slide out the magnetic cores, causing all captured metal to instantly fall off.
• Diverter baffle integration: Integrated angle diverters deflect cascading pellets away from the gaps and directly onto magnetic tube surfaces, maximizing separation efficiency.

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Safe Handling & Storage Guidelines

High-intensity neodymium grate tubes exert strong mutual attraction. Always handle with both hands, keep metallic tools clear during cleaning, and keep pacemakers and magnetic media at a safe distance.

Hopper Magnets Frequently Asked Questions

Common questions answered by our engineering and supply team

Why are hopper magnets essential for plastic injection moulding machines in Pakistan?

Recycled regrind, crushed plastic flakes, and masterbatch pellets often carry stray screws, cutter blade chips, and wire fragments. If metal enters the machine throat, it can severely score the precision injection screw, ruin barrel liners, and clog hot runner nozzles, resulting in hundreds of thousands of rupees in repairs and days of lost production.

How do I choose between round and square hopper magnets?

Round hopper magnets are designed to drop cleanly into the conical section of circular machine hoppers and drying hoppers. Square or rectangular hopper magnets are designed for square feed bins, throat adapters, or chute transitions directly above the machine inlet.

Can your hopper magnets be used inside heated hopper dryers?

Yes, but you must specify operating temperature when ordering. Standard neodymium operates up to 80°C. For heated hopper dryers running at 90°C to 130°C, Faisal Magnets supplies high-temperature NdFeB magnetic tubes (H, SH, or UH grade) that resist thermal demagnetization.

What surface Gauss rating do you recommend for hopper magnets?

For standard tramp iron such as nuts, bolts, and metal shavings, 8,000 to 10,000 Gauss provides dependable protection. For fine metallic dust, abrasive wear filings, and high-purity food or pharmaceutical standards, we supply 11,000 to 12,500 Gauss high-intensity tubes.

How do I order custom-dimensioned hopper magnets from Faisal Magnets?

Measure the internal diameter of your hopper cone at the level where you want the magnet to sit, or measure the square width and length of your feed throat. Share these measurements with Faisal Magnets on WhatsApp at 03144919275 for immediate quotation and stock confirmation.