Magnetic Filter Bar

Your Professional Magnetic Filter Bar Supplier！

Established in 2003, Hesheng Magnetics is one of the earliest enterprises engaged in the production of neodymium rare earth permanent magnets in China. We have a complete industrial chain from raw materials to finished products.we have become the leader in the application and intelligent manufacturing of neodymium permanent magnets field ,after 20 years development,and we have formed our unique and advantageous products in terms of super sizes, magnetic Assemblies,special shapes, and magnetic tools.

Why Choose Us

Customization Capabilities

With over 20 years of experience and continuous investment in technology, we support custom solutions including large-size magnets, complex shapes, and magnetic assemblies to meet specific application needs.

One-stop Solution

From raw materials to finished products, our complete in-house production chain ensures consistent quality, reliable lead times, and better cost control for long-term supply partnerships.

Our Certifications

Certified under ISO9001, ISO14001, ISO45001, and IATF16949, our production follows strict quality control systems.

Overview of Magnetic Filter Bar

A magnetic filter bar (or rod) is a high-strength magnetic device enclosed in a stainless steel casing, designed to remove ferrous contaminants—like iron filings, rust, and scale—from liquids, slurries, or free-flowing powders. They are crucial for protecting machinery, ensuring product purity, and preventing contamination in food, pharmaceutical, and chemical industries.

Product Specification

We offers the following product specifications：

Parameter	Detailed Specifications
Product Designation	Industrial Magnetic Separation Rods
Magnetic Field Intensity	3000-14000 Gauss Range
Construction Materials	Neodymium Rare Earth Magnets + SUS304/316L Stainless Steel
Geometric Profiles	Cylindrical Rod, Rectangular Bar, Custom Shapes
External Housing	SUS304/316L Stainless Steel
Standard Diameters	D19, D20, D22, D25, D28, D30, D32, D38, D50 mm
Environmental Compliance	Eco-conscious Manufacturing

Advantages

High-Efficiency Metal Removal:

With magnetic strengths reaching up to 14,000 Gauss, these bars capture micron-sized particles that other filters miss.

Easy Maintenance:

Designed for quick cleaning, minimizing downtime. Some models feature easy-clean mechanisms where the magnetic core can be retracted.

Cost-Effectiveness:

As a one-time investment with no recurring energy costs (unlike electromagnets), they offer a high return on investment.

Durability:

Constructed from SS304 or SS316L stainless steel, they withstand harsh environments, high temperatures, and corrosive substances.

Material and Structure

The magnetic filter bar is a kind of common magnetic assembly and is widely used in many industries. The surface of themagnetic filter bar will generate strong magnetic field strength relying on its particular internal design, then removing iron-contained impurities and magnetic substance from pending material.

Magnetic filters use separator magnets to pull and remove ferromagnetic contamination from the material being processed. Such materials include most mild steels, some stainless steels, iron, nickel, cobalt, and manganese. “Non-magnetic” materials such as aluminum, silver, gold, many kinds of stainless steel, and copper, will not be moved by magnets (ignoring paramagnetic and diamagnetic effects, which are very weak).

Application

Food and beverage industry: It is very important to ensure that the food is clean and safe. Magnetic separator bars can be used to remove ferrous impurities from raw materials such as grains, spices and liquids. This prevents product recalls and protects consumer health.

Pharmaceutical industry: In the pharmaceutical industry, it is important to keep the quality of the products high and meet strict regulatory standards. magnetic filter bars can help remove iron-containing impurities from powders, granules and liquid suspensions, and ensure the purity of medicines and dietary supplements.

Chemical industry and plastics industry: In the chemical and plastics industry, separator rods can be used to remove iron particles from raw materials and finished products. This improves the quality of the products and prevents damage to the processing equipment.

Recycling and Waste Management: Magnetic filter bars can help separate ferrous material from non-ferrous material during recycling and waste management processes. This makes recycling more efficient and reduces the amount of rubbish that ends up in landfill.

Mining and Mineral Processing: Magnetic filter bars can be used in the mining and mineral processing industry to separate valuable minerals from gangue material. This makes mining more efficient and profitable.

Custom

Sizes & Shapes

We offer neodymium magnets in sizes from 0.010" to large assemblies, with standard shapes like discs, blocks, rings, and arc segments. Custom shapes can be made to your specs.

Grades & Coatings

Available in grades N35 to N52. To prevent corrosion, magnets are coated with options like Nickel (Ni-Cu-Ni), Gold, Chrome, Copper, Epoxy, Teflon, and Rubber/Plastic.

Certifications

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Package & Delivery

1. Package: Standard export package or Custom
2. Delivery: By air express, by sea

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FAQ

Q: What is a magnetic filter bar and how does it function?

A: A magnetic filter bar is a cylindrical magnetic assembly designed to remove ferrous contaminants from dry or liquid materials. It generates a high-intensity magnetic field that attracts and retains metal particles as material flows around it.

Q: What materials are used in your magnetic filter bars?

A: Our filter bars are constructed with high-performance neodymium magnets encased in seamless stainless steel tubes, typically SS304 or SS316, ensuring durability, corrosion resistance, and hygienic performance.

Q: What industries commonly use magnetic filter bars?

A: These products are widely used in food processing, pharmaceuticals, chemicals, plastics, mining, and recycling industries where contamination control is essential.

Q: What magnetic strength do your filter bars provide?

A: We offer surface magnetic strengths typically ranging from 8,000 to 12,000 Gauss, depending on the application requirements and magnet grade.

Q: Can magnetic filter bars capture fine particles?

A: Yes, the high-gradient magnetic field is capable of capturing fine and even micron-sized ferrous particles, improving product purity and protecting downstream equipment.

Q: Are your products suitable for food-grade applications?

A: Yes, we offer food-grade designs with polished stainless steel surfaces that meet hygiene standards and are easy to clean and maintain.

Q: What sizes and configurations are available?

A: Standard diameters include 19mm, 22mm, 25mm, and 32mm, with customizable lengths to fit various equipment such as hoppers, pipelines, and chutes.

Q: Do you offer customization services?

A: Yes, we provide OEM and ODM services, including custom dimensions, magnetic strength, end fittings (threaded, tapped holes), and surface finishes tailored to your application.

Q: What is the maximum operating temperature?

A: Standard models operate effectively up to 80°C (176°F). For high-temperature environments, we offer specialized versions using heat-resistant magnets.

Q: How are the magnets sealed within the filter bar?

A: The magnetic core is hermetically sealed inside a stainless steel tube using precision welding techniques, ensuring long-term durability and preventing leakage or contamination.

Q: How do you ensure product quality?

A: We implement strict quality control measures, including magnetic strength testing, dimensional inspection, weld integrity checks, and final product verification before shipment.

Q: What is your minimum order quantity (MOQ)?

A: MOQ typically starts from 50 to 100 units for standard products, with flexibility for customized orders depending on specifications.

Q: What is your standard lead time?

A: Lead time is generally 15–25 days after order confirmation. Custom designs may require additional production time.

Q: Are magnetic filter bars easy to install and maintain?

A: Yes, they are designed for simple integration into existing systems. Smooth surfaces allow for quick cleaning, and optional easy-clean designs are available to reduce maintenance time.

Q: What after-sales support do you provide?

A: We offer responsive technical support, product replacement for quality issues, and ongoing assistance to ensure optimal performance and long-term customer satisfaction.

As one of the most experienced magnetic filter bar manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please rest assured to wholesale cheap magnetic filter bar for sale here from our factory. Customized orders are welcome.

25mm 12000 GS Magnetic Bar, magnetic holders