Get the magnetic attraction!
Our Magnetic Filters remove particles and contaminants from process fluids such as cooling lubricants, washing and cooling water or fuels at low cost and without consumables.
How does magnetic filtration work?
Highly effective neodymium magnets generate a magnetic field that attracts dirt particles made of iron, steel and, in some cases, stainless steel, carbide and corundum. Due to the special flow design, the cleaned liquid flow through the inlet port, after which it evenly flows around a series of magnetic bars. This makes it possible to filter out even the finest particles below 1 µm.
You do not need any additional consumables or operating energy to run our Magnetic Filters. In addition, there is hardly any pressure loss when operating the magnetic filter. Even when the filter rods are full, the liquid can pass through the filter without any additional pressure. Apart from occasional cleaning of the magnetic rods, no further maintenance is required.
The advantages at a glance:
Magnetic filters are capable of removing ferritic particles from process fluids such as cooling water, emulsions, grinding oil and washing water, etc. The basis of a magnetic filter is the magnetic field force. The magnetic field force exerts a force on ferritic particles, such as iron, steel, carbide, stainless steel, etc.
Different materials are used for permanent magnets. Commonly used are magnets made from AlNiCo, ceramics or rare earths. Taking into account the special application limits, magnets made of rare earths (neodymium magnets) offer the highest flux density and thus the greatest attraction for dirt particles. A disadvantage is that the material is very susceptible to corrosion and must therefore always be protected by a coating or stainless steel housing. Furthermore, most neodymium magnets are only temperature resistant up to max. 80 °C. In continuous use, the max. temperature should be limited to approx. 60 °C.
Both systems are based on magnets, but work differently. Both fall under the category of magnetic separators. In a magnetic roll, the liquid gets washed over the rotating magnet. The magnetizable particles stick to the magnet. The magnet continues to rotate with the particles on it and the particles are removed with a scraper. The now clean magnet continues to rotate and the fluid is cleaned of the ferritic particles. The field force of the magnet is usually between 2500 and 3500 gauss.
A magnetic filter has no moving parts. The liquid flows through the inlet, flows around the magnet in the housing, and flows back into the system through the outlet, while the particles are attracted. The particles must be removed manually after a while. The field strength of the magnet is usually above 10,000 gauss.
Magnetic rolls offer the advantage that they clean themselves and do not require any supervision or labor. However, the magnetic filter can remove much smaller particles from the liquid because the magnetic rod is stronger than that of a magnetic roller.
Therefore, the two systems perform different tasks: A magnetic roll serves as a pre-filter, continuously removing ferritic particles down to 20µm in size. There is no labor involved and no expendable materials are used. A magnetic filter is a filter that can remove all ferritic particles, even down to 1µm. Thus, this is intended, among other things, for ultra-fine filtration, but can also perform the task of the magnetic roll, if one is willing to invest the labour to clean it.
FRIESS has been developing solutions to optimize the cleaning of process fluids for 50 years. As a manufacturer of magnetic filter systems, we ensure long-lasting use of oils and less wear on machines and components. In this way, we combine significant cost savings, sustainability and environmental protection.
Before using a magnetic filter, it is important to establish the performance characteristics and physical requirements. The following points should be considered:
In considering this, the purchase of a magnetic filtration system for your oil quickly becomes an effective economic advantage. The most significant advantages are the longer service life of the oil and reduced maintenance due to failures or wear.
Magnetic filters can be installed either as in-line or bypass filters in a process. The optimal operation for the filter is if it is operated in a bypass connection. Then the operating conditions can be designed exactly for the filter and optimum results can be achieved. As an in-line filter, magnetic filters can serve as pump protection. In such an application, however, the care of the liquid is no longer the priority.
Magnetic filters only require maintenance when they are cleaned. Otherwise, there is no need for maintenance. Only automated systems that clean themselves require occasional spare parts.
Even a small amount of waste oil pollutes large quantities of water. By reducing the amount of oil that needs to be replaced by up to 90 percent, you significantly reduce the burden on the environment. With magnetic filtration, you are helping to actively promote sustainability and environmental protection.