Drinking water quality is a global problem that’s why etched metal filter screen is important. According to experts, tap water is very rare to drink. However, this does not mean at all that residents of the listed regions receive crystal clear water.
Utility workers remind about the problem of the "last mile": the quality of water dramatically decreases on the approaches to apartments due to the poor condition of water pipes. To purify the water that enters the house, special filters install.
The main filter is the heavy artillery among water purification devices. This device does not install on separate taps or pipes, but on the mains - the water supply system, which supplies water to the house, to the personal plot, etc.
However, for apartments with centralized hot water supply, you need to separately install etched metal filter screen for hot and cold water.
The average productivity of the unit is 20–40 liters per minute, up to three tons of clean water per hour, enough for drinking, washing and dishwashers, and using plumbing. The unit not only filters water, but also softens it, cleans it from pesticides, bacteria, and other harmful impurities.
Main filters of two types are common: with replaceable cartridges and cleaning elements. If the cartridges have to be changed 2-3 times a year, then in models with backwashing, stainless mesh replacement is required much less often.
In the main devices for water purification, special filter screen is common. This is a special type of woven mesh in which the longitudinal wires are so tightly intertwined with the cross wires that the cells are not visible to the light. From the side, the mesh fabric looks like a dense fabric, and if you look closely, the interlacing of the wires resembles a basket of vines.
Filter nets, provide a high degree of water purification from impurities:
The production of woven mesh for mainline filters is regulated by GOST 3187-76 and specially developed technical conditions. The mesh is based on stainless steel wire of grades 08Х18Н10, 12Х18Н9 (international analogue - AISI 304), 08Х18Н10Т, 12Х18Н10Т, (analogue - AISI 321).
Etched metal filter screen has following features.
Features of using a stainless steel mesh in main water filters:
Let's start with coarse etched metal filter screen. Such filters, for the most part, are common for preliminary water purification and water preparation for technical and economic purposes. Their main purpose is to remove large mechanical particles and suspensions from water.
Moreover, the danger of mechanical contaminants is obvious. No one willingly will drink water with sand, and technology does not welcome it either. Poor quality water increases wear on parts, enhances corrosive effects, reduces throughput and has other negative consequences.
The first of the filters for mechanical cleaning is an etched metal screen. Its working element is a mesh that separates large mechanical particles ranging in size from 20 to 500 microns. It copes with coarse suspensions such as silt, sand, and rust.
The mesh comes of materials that are not subject to corrosion, but with prolonged use, like any filter element, it becomes clogged.
Moreover, you can avoid this by regularly replacing or cleaning the mesh. The strainers come with a direct flush mechanism. When the valve is opened, part of the water is discharged into the drain, taking with it the layers of contaminants from the inside of the mesh.
There are etched metal filter screen models come with a backwash mechanism. The water needed to clean the filter goes to the top of the filter, then the impeller directs the water through the main filter from the inside to the outside, that is, the filter is backwashed with filtered water.
The pluses of mesh filters include a wide variety of models and sizes. Thanks to this, they are easy to install in difficult conditions with different amounts of space. Accordingly to the task of water purification, such filters effectively protect equipment or household appliances from clogging. It is worth considering the position in which the installation is supposed to.
Moreover, the working position of the washing and self-cleaning devices is horizontal. Not all models work in an upright position. Note that for etched filter screen, the temperature of the water with which you have to work is important. Main filters for hot and cold water may differ even visually.
Further, for cold water they are transparent, for hot water they are opaque and metallic. In any case, it is worth clarifying their temperature range. Since inappropriate thermal conditions cause deformation of the bulb or mesh and related accidents.
Another solution for household water purification can be the installation of disc filters. They also do an excellent job with large mechanical impurities such as sand, scale, and rust. Of course, they have their own specifics.
Moreover, the advantage of disc filters is high performance as etched metal filter screen, a wide range of microns of filter discs, from 20 to 200 µm, and easy maintenance.
Furthermore, the filter element in disc filters is a block of discs of polymeric materials that are not subject to corrosion. Their surface covers with grooves of a certain depth. During operation, the discs are compressed, creating a complex structure that traps large mechanical particles.
