How To Choose a High-quality Tube Magnet Filter
As a magnetic filter, the tube magnet is widely used to remove magnetic impurities in fluid or semi-fluid materials. The quality of tube magnets on the market is uneven, so how should we judge the quality of the magnetic tubes?
The Structure Of Tube Magnets
First of all, we need to understand the structure of the permanent magnetic filter tube: the magnetic tube is composed of a stainless steel tube, magnetic conductive sheets and some powerful magnets, and the two ends are welded with a mounting plug. The cost of NdFeB Magnets accounted for the largest proportion in the tube magnet. The surface magnetic field strength is the basic indicator of the magnetic bar. The higher the magnetism, the higher the price. Some magnetic tubes on the market will also use some cunning means to make their low-quality magnetic bars meet the magnetic field strength required by customers, and earn high profits from it.
The following are some of the methods that GTEK has compiled for many years to determine the quality of the magnetic bar:
1. The Thickness Of Stainless Steel Tube
The closer the Gauss meter probe is to the tube magnet, the higher the measured magnetic value. The inferior tube magnet only needs to use a thinner steel tube to reduce the magnet grade and achieve the same surface magnetism. According to GTEK's experience and optimization, the use of 0.5mm-0.8mm wall thickness stainless steel tube can not only meet the needs of the magnetic field but also have a long service life.
On the contrary, if a pipe with a wall thickness of 0.3mm is used, it is easier to wear the pipe due to the friction of the material particles with the pipe wall at all times. First, the material will be polluted, and then the magnet will be rusted and scrapped.
Disadvantages: reduce the service life of the tube magnets.
2. The Volume Of Rare-earth Magnets
Generally, the acceptance measurement of the tube magnet is in the area of the magnetic permeable sheet, which is also the maximum value of the magnetic pole, so a small diameter of the magnet has little effect on the surface magnetism, but the thin-walled steel pipe is not completely filled, and a small diameter magnet will cause The wall of the tube is recessed, and the stress is concentrated on the protruding part, which is most likely to break.
Disadvantages: The uneven surface of the bar is easy to break.
3. Using Defective Magnets
Magnets with missing corners and knurls are inferior products, and the price is very low, but they are sealed in magnetic rods, which are not visible in appearance and difficult to pass other methods of inspection. The iron removal efficiency of a magnet composed of a defective magnet will be poor.
Disadvantages: Uneven Magnetic Field
4. Using Second-class Magnets
The so-called second-class products are magnets that are judged to be unqualified by top manufacturers for various reasons, but there is no problem in the application of magnetic filtration. So some manufacturers buy these low-priced second-class products to make low-quality tube filter magnets. Such second-class products are not always available, and are mainly round slices.
If we use the magnetic pole observation film to view, the top of the picture is the magnet that is exactly made, the magnetic pole distribution is large and uniform, and the bottom of the picture is the magnetic pole distribution of multiple round slices, which is messy and uneven.
GTEK HIGH QUALITY FILTER MAGNETS
Tube Magnets
Tube Magnets are mainly used in magnetic separators with grate magnet structure, which can effectively absorb iron impurities and small metal particles in loose or flowing raw materials.
Magnetic Liquid Filter
Magnetic Liquid Trap, aka Magnetic Liquid Filter, is used in fluid, semi-fluid and other fluid materials with different viscosity to remove iron impurities and other ferromagnetic particles.