Also known as a pressure filter. Preparation of pure pre-pre-treatment, water purification system, an important part. Material steel rubber lined or stainless steel, according to the filter medium is divided into natural quartz sand filter, multi-media filters, activated carbon filters, manganese, sand filters, etc., according to the water can be divided into single-flow filter, The double filter, can be used in conjunction with the actual situation can be used alone. 
 Pipeline of single-stream mechanical filter is a simple, smooth operation. The filter flow rate is generally 4-50m / n, the run cycle is generally eight hours. Top and bottom of the double mechanical filter with the intake unit, Central has a water device. The advantage of filtering water decontamination higher, run a long cycle, usually 20 hours, the disadvantage is more complex piping systems, the run is less stable and more difficult to wash refueling. 
 First, the works 
 The mechanical filter is the use of one or several filter media, under certain pressure, the liquid through the media, the removal of impurities, so as to achieve the purpose of filtering. Its built-in filler is generally as follows: quartz sand, anthracite, granular porous ceramics, manganese sand, the user can choose to use the actual situation. 
 The mechanical filter is one of the traditional methods of use of fillers to reduce water turbidity, retention in addition to the District, the water of suspended solids, organic matter, colloidal particles, microorganisms, chlorine taste and odor, and some heavy metal ions, so that feed water to purify the water treatment. 
 Second, the range of applications 
 Mechanical filter is widely used in the treatment process, mainly used for turbidity removal water treatment, reverse osmosis, and ion exchange softening and demineralization system before the level of pretreatment, also be used for surface water and groundwater in addition to the sediment. Water turbidity of less than 20 degrees, water turbidity up to 3 degrees below. 
 Third, performance characteristics 
 A. Low cost equipment, low running costs and easy management 
 Two. Filter can be used repeatedly after backwashing, filter long life 
 3. Filter effects, and small footprint 
 Fourth, the selection of the mechanical filter 
 The size of the mechanical filter water and use different choice of A3 steel or stainless steel or fiberglass, but also according to the feed water quality and water quality requirements, you can choose single-layer filter, dual-media or multi-layer filter.