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Magnetic Bar for Filtration
Engineered by Zhaobao Magnet, our industrial Magnetic Bar for Filtration features high-purity NdFeB cores delivering surface strengths up to 14,000 Gauss. Encapsulated in food-grade SS304/SS316L, it offers superior corrosion resistance, easy cleaning, <1% demagnetization over 10 years, and full OEM customization.
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Product Description
Buy Zhaobao Magnet high-quality Magnetic Bar for Filtration today—contact us for factory-direct wholesale quotes and free samples! Backed by 30 years of manufacturing excellence, 60,000 m² facilities, and 8,000-ton annual capacity, we control the entire chain to guarantee over 95% material purity. We offer complete OEM/ODM solutions from 3,000 to 14,000 Gauss with fully sealed, high-temperature options. Trusted by 3,000+ global clients with 8-hour rapid support.
What Is a Magnetic Bar for Filtration?
A Magnetic Bar for Filtration (also known as a magnetic filter rod, magnetic tube, or magnetic separator bar) is an essential high-efficiency magnetic separation component engineered to remove fine ferrous contaminants, tramp iron, and weakly magnetic particles from liquid, slurry, granular, and powder processing lines. It consists of high-energy permanent magnets—typically high-grade Neodymium (NdFeB) or Samarium Cobalt (SmCo)—densely stacked inside a seamlessly welded, highly polished stainless steel sleeve (SUS304 or SUS316L).
In modern industrial manufacturing, even microscopic iron filings or rust particles can compromise end-product quality, damage downstream processing equipment, or lead to costly product recalls. Magnetic filter bars serve as an economical, zero-energy-consumption filtration solution that works continuously to catch iron contaminants as fluid or bulk material flows over their outer casing.
How Magnetic Filter Bars Work
The working principle of a magnetic filter rod relies on high-density magnetic circuit design and magnetic gradient theory. Inside the sealed stainless steel casing, multiple permanent magnet rings are arranged with alternating north (N) and south (S) poles separated by high-permeability pole pieces. This precise assembly concentrates the magnetic flux lines onto the exterior surface of the tube, creating an intensely strong magnetic field with high surface Gauss ratings.
When raw materials—whether free-flowing liquid, viscous slurry, or dry bulk powder—pass through the magnetic field generated by the bar:
Key Features
Our magnetic separator rods are engineered to provide ultimate performance, making our Magnetic Bar for Filtration the ideal choice for demanding processing lines across heavy and fine industries alike.
1. High Magnetic Strength
Utilizing premium Rare Earth Neodymium (NdFeB) magnets manufactured in-house, our filter bars deliver exceptionally high surface magnetic field intensity. Standard surface strength starts from 6,000 Gauss up to ultra-high magnetic fields reaching 12,000 Gauss, 13,000 Gauss, or even 14,000 Gauss. The high gradient design ensures maximum capture efficiency for weakly magnetic oxides and micron-sized iron particles.
2. Stainless Steel Corrosion Resistance
The outer housing is constructed from heavy-duty Food/Pharma grade Stainless Steel (SS304 or SS316L). Fully welded using TIG/Laser welding techniques and polished to a mirror finish (Ra < 0.4 μm) or fine satin finish, the casing is leak-proof, highly resistant to acid/alkali corrosion, and fully compliant with strict hygiene standards.
3. Customizable Sizes and Magnetic Grades
Every industrial production line has unique layout and operational demands. We offer full engineering flexibility with customizable outer diameters (ranging from 12mm to 50mm), variable lengths up to 2000mm, diverse end-cap styles (threaded holes, plain caps, handles, or mounting bolts), and magnetic grades tailored to specific working temperature limits (N35 to N54, N48EH, N45AH rated up to 350°C).
4. Easy Cleaning and Maintenance
Maintenance efficiency is critical for minimized downtime. Our magnetic bars feature ultra-smooth surface finishes that allow operators to quickly wipe clean accumulated iron filings using a cloth or rubber scraper. For automated or high-volume lines, we also offer quick-clean sleeve assemblies where pulling the internal magnetic core allows trapped contaminants to drop off effortlessly.
5. Stable Performance for Industrial Filtration
Using advanced vacuum sintering and thermal stability processing, our magnetic bars exhibit extremely low demagnetization rates (<1% loss over 10 years under specified temperature limits). They operate continuously without electricity or external power sources, providing long-term, zero-maintenance operational safety.
Technical Specifications
Below are standard engineering parameters for our industrial magnetic filter rods. Custom specifications are readily available upon request.
| Parameter | Standard Options & Range |
|---|---|
| Diameter | Φ12mm, Φ19mm, Φ25mm (1 inch - Standard), Φ32mm, Φ38mm, Φ50mm (Customizable) |
| Length | 100 mm to 2,000 mm (Custom lengths according to chute or pipeline dimensions) |
| Magnetic Strength | 3,000 Gauss to 14,000 Gauss (Surface flux measured by calibrated Gaussmeter) |
| Material | Outer Tube: SS304 / SS316L; Inner Magnet: High-Grade NdFeB / SmCo |
| Surface Finish | Mirror Polish (Ra ≤ 0.4μm), Sanitary Finish, or Bead Blasted |
| Operating Temperature | Standard: ≤ 80°C; High Temp Series: 100°C, 150°C, 200°C, up to 350°C (SmCo/EH/AH grade) |
| End Features | M6/M8/M10/M12 Threaded Hole, Threaded Stud, Plain Seal, Ring Handle, or Customized Caps |
| Waterproofing | 100% Hermetically Sealed Welds (Waterproof, Pressure-Proof for wet liquid slurry systems) |
Applications
Our magnetic separator bars are widely installed across a broad range of process industries to protect equipment such as crushers, extruders, pumps, and spray nozzles, while ensuring end products meet strict purity standards.
Why Choose Us
As a premier manufacturer with 30 years of expertise, Zhaobao Magnet Group produces every Magnetic Bar for Filtration under strict quality control, leveraging deep vertical integration from raw materials to final assembly.
Factory Capability & Integrated Supply Chain
Established in the 1990s, Zhaobao Magnet Group is one of China's pioneer rare earth magnet producers. Spanning over 60,000 square meters of production space with more than 500 skilled employees, our annual Neodymium magnet output exceeds 8,000 tons. Unlike assemblers who purchase magnets from third parties, we control the entire process from rare earth raw materials to final vacuum sintering, slicing, and stainless encapsulation. Our products achieve over 95% material purity compared to the 80% industry average.
World-Class R&D and Quality Assurance
Holding 22 invention patents and co-operating the "Permanent Magnet Engineering Technology Center" with the Chinese Academy of Sciences, our technical team leads the market in high coercivity, high thermal stability, and low weight loss magnet formulations. We hold full international management certifications including IATF16949, ISO9001, ISO14001, and ISO45001. Furthermore, our products satisfy CE, RoHS, REACH, EN71, and CP65 standards, making us the only Chinese magnet manufacturer capable of passing CHCC certification.
Custom OEM/ODM Engineering & Global Reach
We have served over 3,000 international clients across 95+ countries, including industry giants such as Huawei, Samsung, Disney, Hitachi, General Motors, Haier, Volkswagen, Xiaomi, and Foxconn. Whether you require standard dimensions or highly customized magnetic filter bar assemblies according to CAD drawings, our experienced foreign trade engineering team provides fast quotes, barrier-free technical support, and door-to-door global logistics.
Frequently Asked Questions (FAQ)
What contaminants can magnetic bars remove?
Magnetic filter bars can capture a wide spectrum of iron impurities, ranging from large tramp metals (nuts, bolts, nails) to microscopic iron dust, rust particles, wear debris from stainless steel equipment, and weakly magnetic iron oxides generated during grinding or conveyance processes.
What Gauss level should I choose?
The required surface Gauss rating depends on your specific application:
Can magnetic bars be customized?
Yes. We offer complete OEM/ODM customization. You can customize the outer diameter, total length, magnetic field strength (Gauss), stainless steel grade (304 or 316L), maximum working temperature, and end fixing methods (internal/external threads, handles, or flange mounting) according to your system dimensions.
Contact Us
Looking for reliable, high-gauss magnetic separation solutions directly from a 30-year manufacturer? Inquire today to get custom engineering support and a fast quote for your Magnetic Bar for Filtration requirements.
Partner with Zhaobao Magnet Group—Your trusted global expert in high-performance permanent magnet systems!
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