FMF filters are used to purify liquids in pipelines. Processing is carried out in two positions (purification from mechanical impurities and magnetic filtration). Fixing parts is carried out using bolts. Several modifications of this equipment are used, which differ in size and cross-section. Let us consider in more detail the device and the purpose of this element, as well as expert reviews.
Design features
FMF magnetic filters include a mechanical mesh and magnetic part. The first of them serves to delay sand and other large inclusions, and the magnet helps to filter ferromagnetic elements, regardless of their size. The mesh compartment is made of stainless wire, designed to delay objects whose dimensions exceed the area of one cell of the structure (1x1, 2x2 or 4x4 mm). The mesh is removable, if necessary it can be removed and replaced.
The magnetic part of the FMF filter works effectively if the element is positioned correctly. The device is placed so that the filtered fluid processed the maximum area of the magnet at a minimum distance. In this case, the water is in contact with the surface being washed with the highest rate of tension. The component may vary in size, made of cast iron or similar metal. The service life of this part is about 15 years.
Advantages and disadvantages
The FMF magnetic flange filter is used to clean cold and hot liquids. For the product to work efficiently, a regular check of the sludge block for clogging and its timely purging is required. Some modifications are equipped with a backwash option; cleaning the filter under high pressure is not allowed.
The main advantages of this element:
- Resistance to clogging and deformation, which minimizes maintenance.
- Simplicity of design, simplifying the operation and installation of the part.
- High rate of efficiency in the processing of ferro compounds.
- Wide range of operating temperatures.
- Low cost price.
Among the disadvantages of the FMF filter is the intended use, which allows you to capture only a limited list of compounds.
Principle of operation
The device is designed to retain contaminants from the internal and external environment, including open water bodies from which water is drawn. Of these, leaves, algae and other large particles can be transported.
Internal contaminants include intrusions formed on the walls of the water supply system as a result of corrosion or scale. As a result of the impact of mechanical processes on the metal, the chipped elements enter the liquid.
The filter flange FMF, due to the optimal configuration, uses the maximum possible volume. Plying along the pipe, the liquid changes direction a little, getting into the working glass. Seeping through the walls of the device, it interacts with the mesh and magnetic parts, getting rid of impurities.
This principle of operation is more effective than in analogues, where the change in the work flow is not used, since contact occurs only along the edges of the filter, which reduces its functionality. When water interacts with the entire area of the magnet, it is possible to destroy the physical and chemical stability of impurity particles.
Specifications
Between themselves, the devices under consideration differ in remote control (conditional diameter). It indicates the actual throughput of the part. For example, flange filters FMF-50 are focused on the retention of persistent chemical particles. With DN 50, the cell area is 1.4 × 1.4 mm. The device is installed in the supply and return lines with a maximum working pressure of up to 1.6 MPa. The temperature range varies from +5 to +150 ° C. The installation length of the product is 23 cm. The following remote controls (in millimeters) are distinguished: 350, 300, 250, 150, 125, 100, 80, 65, 50, 40, 32, 25, 20.
The length of the device with a remote control of 65 - 29 cm, weight - 16 kg. The modification is designed to delay pollution in the same highways as smaller analogues. The cell area is 1.4x1.4 mm. Filters FMF-80 and 100 are operated in pipelines with an average diameter, have identical characteristics with other models, but have increased throughput. The installation length is 31 and 35 centimeters. The cell size - 1.4x1.4 mm allows you to delay all large particles in the highway. The mass of products is 16 kg.
Installation and maintenance
When installing a magnetic filter FMF-50 and its analogues, a number of conditions must be observed:
- Pre-clean the pipeline from contamination by flushing it.
- The filter is insured with a special device that excludes its breakdown during installation.
- Rafter devices must not be removed until the equipment is fully installed.
- The pipe edges adjacent to the product are attached.
- Particular attention is paid to fixing the gaskets between the flanges.
- An important point: the FMF filter must be installed evenly, eliminating distortions and tightness, ensuring complete coincidence of the bolt sockets.
- Installation of the device is carried out on a rigid site, avoiding the pressure of its mass on the walls of the pipeline.
- The tightness of the installation is checked.
- Installation is done with the flange cover down.
- Fluid must be supplied in the same direction as the pointer on the housing.
Recommendations
If during operation of the magnetic filter FMF-100 the pressure jump was 0.15 MPa from the norm, it is necessary to get the filter element and carry out its cleaning. First, it is mandatory to turn off the fluid supply, and then unscrew the special plug.
When servicing the structure, you must adhere to the following rules:
- It is forbidden to clean or repair the element in question if there is high pressure in the main cavity.
- Inspection and maintenance of the product is required to be carried out on time.
- Explosive pipelines are repaired strictly in accordance with the regulations for technical operation.
- With a loss of tightness, the gaskets are replaced with new parts with bolt tightening.
- Storage of the product should be carried out in the original packaging, the air in the room should not be filled with corrosive components.
Reviews
Users note that modern FMF-50 filters are reliable and easy to operate. Experts advise choosing products from trusted manufacturers, avoiding cheap fakes of low quality. A great advantage of this device is a wide range of working size (nominal diameter). This allows you to choose a filter element for all sizes of pipelines. Consumers also point to better cleaning efficiency compared to peers that do not provide for a change in the direction of fluid flow. On the market are modifications of domestic and foreign production. With proper operation and timely maintenance, these parts will last at least 15 years.
In conclusion
The FMF magnetic flange filter is widely distributed in various fields where water pipes and other highways filled with working fluids are used. The effectiveness of the product is proven in practice and confirmed by expert reviews. The use of this element allows for the thorough purification of water not only from mechanical impurities, but also ferrimagnetic compounds.