Home » MPI Products Inc » Products » Metal Separation and Metal Sorting Solutions » Magnetic Separation for Pneumatic Applications » Pneumatic Line Magnets
Pneumatic Line Magnets
MPI Pneumatic Line Magnets are designed for high-velocity pressure and vacuum conveying systems, enabling inline metal separation without disrupting material flow. These compact separators use powerful rare earth magnets to effectively capture fine and weakly magnetic contaminants in fast-moving product streams. Central to their technology is the patented Wave Magnet design, which enhances magnetic field exposure and holding strength by creating turbulence that increases metal capture efficiency. Constructed from rugged, hygienic stainless steel, these tools allow for easy access to the magnetic core and are suitable for sensitive downstream equipment. Their modular design accommodates both horizontal and vertical mounting, making them versatile for various applications. Ideal for industries like food, plastics, and nutraceuticals, MPI Pneumatic Line Magnets ensure exceptional ferrous separation performance while complying with FDA, USDA, and cGMP standards, thereby enhancing product quality and equipment protection in high-throughput environments.
Wave™ Self-Clean Pneumatic Line Magnet
The patented Wave™ Self-Clean Pneumatic Line Magnet is designed for use in pressurized or vacuum pneumatic conveying systems, where it captures ferrous contaminants from dry materials like powders and granules. Featuring a patented sinusoidal magnetic cartridge, it generates controlled turbulence that enhances the capture of fine, fast-moving metal particles. As metal accumulates, the self-cleaning mechanism activates at scheduled intervals or on demand, retracting the magnet and using compressed air to clear the magnetic surface without interrupting the material flow. This system allows operators to set cleaning cycles based on time or sensor input, ensuring efficient operation with minimal downtime.
Pneumatic Line Magnet
The MPI Pneumatic Line Magnet is a high-performance magnetic separation system designed for pneumatic conveying lines, effectively eliminating ferrous contaminants from dry powders and granular materials. It features a high-intensity rare earth magnetic cartridge that allows uninterrupted flow and prevents pressure drops, making it ideal for high-velocity applications. Constructed from durable stainless steel with a hygienic design, it is suitable for food, chemical, plastics, and pharmaceutical industries. The magnet includes manual-clean and quick-clean options for easy maintenance, thereby protecting downstream equipment like rotary valves and blenders.
Pneumatic Tube Magnet
The MPI Pneumatic Tube Magnet is a compact magnetic separation system for pneumatic conveying lines handling dry powders and bulk materials. It features a powerful, rare-earth magnetic cartridge that effectively captures ferrous contaminants, protecting downstream equipment and ensuring product integrity without disrupting flow. Its tube-style design is cost-effective and space-efficient, suitable for small to medium systems, and provides low pressure drop while maximizing magnetic exposure. Made from hygienic stainless steel, it comes in both manual and quick-clean versions. It is ideal for food, plastics, pharmaceuticals, and powder processing industries, where cleanliness and compliance are crucial.
Compatibility Check - Pneumatic Line Magnets Comparison
Unique Benefits and Considerations
Industries, Applications and Regulations
For assistance in selecting the most suitable vibratory and shaker conveyors for your application or for additional customization options, contact Magnetic Products Inc. today to speak with our team of experts!
Industry Type
MPI’s Wave™ Self-Clean Pneumatic Line Magnet, Pneumatic Line Magnet, and Pneumatic Tube Magnet are essential in industries where dry bulk materials are pneumatically conveyed and product purity, equipment protection, and regulatory compliance are top priorities:
Food & Beverage Processing
Dry ingredient blending (e.g., flour, starch, sugar, cocoa, salt, spices)
Snack foods, cereals, and baking mixes
Beverage powders (coffee, drink mixes)
Dairy powders (milk, whey, casein)
Pharmaceutical & Nutraceutical
Tablet and capsule filling lines (powder handling)
Nutritional powders, protein blends, supplements
Ingredient transfer for mixing or packaging
Plastics & Polymers
Virgin resin transfer (e.g., PE, PP, ABS, PET)
Regrind and flake handling
Masterbatch ingredient dosing
Chemical Processing
Additives, pigments, titanium dioxide, silica
Detergents and cleaning agents
Industrial and specialty powders
Pet Food & Animal Feed
Dry kibble and meal ingredient transfer
Powdered vitamin and mineral blending
Cosmetics & Personal Care
Talcum, mica, and powder base ingredient handling
Bulk transfer of fine cosmetic powders
Processing Application
MPI pneumatic magnetic separators are used in:
Pressure and vacuum conveying systems
Ingredient transfer between storage, blending, packaging, or dosing stations
Rotary airlock protection before mixing or extruding
Inline inspection points prior to final packaging or extrusion
Typical Products:
Powders: Flour, sugar, milk powder, whey, cocoa, spices, silica, pigments
Pellets: Plastic resin, protein pellets, kibble
Granules: Salt, coffee, rice, feeds, fertilizers
Flakes/Chips: Plastic regrind, cereal, bran, crushed minerals
Regulations and Requirements
Regulatory & Quality Control Requirements
FDA (21 CFR 177)
Required for food-contact materials. MPI magnets are made with 304/316 stainless steel and FDA-approved gaskets (e.g., silicone, EPDM, Viton®).
USDA
Especially relevant for meat, dairy, and egg processors. Equipment must be sanitary, easy to clean, and corrosion-resistant.
cGMP (Current Good Manufacturing Practices)
Applies to food, pharma, and supplement industries. Requires:
Documented cleaning schedules
Validation of metal separation effectiveness
Operator safety during magnet handling or cleaning
HACCP & FSMA (Food Safety Modernization Act)
MPI magnets can be designated as Critical Control Points (CCPs). Must be:Routinely tested (pull tests or gauss checks)
Logged for inspection and validation
Easily cleanable without cross-contamination
GFSI (SQF, BRCGS, FSSC 22000)
Requires magnet strength verification, sanitation SOPs, and full traceability of validation tests and cleaning logs.
3-A Sanitary Standards (optional)
For processors seeking ultra-hygienic equipment. Some configurations may meet 3-A design criteria (e.g., polished surfaces, tool-free access, CIP compatibility).
Quality Control Best Practices
Control MeasureBest PracticeMagnetic Strength Verification
Use gauss meters or pull-test kits routinely, document in QA logs
Cleaning Verification
Clean per shift or per batch; validate metal removal with cleaning log
Reject or Retention Monitoring
Check for accumulation rate; adjust cleaning interval based on product volume
Validation Testing
Use certified test wands (FE, NFE, SS) to ensure magnet performance at CCPs
Documentation & Traceability
Required for all GFSI and FSMA-compliant operations; supports