Overview of mechanical filters, also known as pressure-type filter. It is an important part of the pre-pure water pretreatment, water purification system. Materials are rubber lined steel or stainless steel, depending on the filter media into natural quartz sand filters, multi-media filters, activated carbon filter, manganese sand filters, etc., according to the water can be divided into single-flow filter, double filter, can also be used alone in combination according to the actual situation. Automatic mechanical filters for applications that require filtered water turbidity generally 5 mg / liter or less able to meet drinking water standards of industrial water or domestic water treatment equipment to industrial and mining towns. Industrial wastewater suspended solids removal, etc. have a good effect. Water suspension containing the aggregated flakes bonded by precipitation methods can not remove the colloidal particles, water may be filtered through a layer packed in the pressure filter, the water to reach transparent. Mechanical filters, also known as pressure filter is pre-prepared pre-treatment water, an important part of the water purification system, which are made of rubber lined steel or stainless steel, due to the different filling filter medium, and the role of the difference between each use. Usually there are quartz sand filters, activated carbon filters, manganese sand filter. According to the actual situation may be used alone or in combination use. Multi-media filter media quartz sand, anthracite. Function is to filter out mechanical impurities suspended solids, organic matter, reduce water turbidity. Activated charcoal filter medium is activated carbon, the purpose of adsorption, removal of pigment, organic matter, chlorine, colloid. Manganese sand filter media manganese sand, water main place divalent iron ions. 2 is the working principle of mechanical filters using one or several filter medium, at a certain pressure, so that through the liquid medium, removal of impurities, so as to achieve the purpose of filtering. Its built-in filler generally: quartz sand, anthracite, granular porous ceramics and manganese sand, the user can choose according to the actual situation. Mechanical filter is the use of fillers to reduce water turbidity, suspended solids in water to remove trapped organic matter, colloidal particles, microorganisms, chlorine odor and some heavy metal ions, so that the water supply of water purification has been the traditional method. How it works: mechanical filters (also known as multi-media filters, quartz sand filters). It is a pressure filter, the filter is filled using the refined quartz sand, from top to bottom when the water flows through the filter layer, suspended solids and pectin particles are removed, so that the water is turbid decreased. Performance: mainly used for water turbidity, water softening, electrodialysis, the first stage reverse osmosis pretreatment can also be used aspects of surface water and groundwater. Can effectively remove suspended solids, organic matter, colloid, such as silt.