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FILTERS

    Sand-gravel media filters

     

    Sand-gravel filters are used when it’s necessary to filter water with high amounts of organic and/or inorganic particles (algae, clay soils and etc.). Gravel filters clean water through the layer of particles of different size: sand, gravel or other granular materials. The efficiency of filtration depends on the layer size and water flow speed. For a better result it’s possible to install filtering blocks — so called filtering systems. Pebble sand of silicate origin serves as the filtering element. The filter is cleaned by means of back-flushing, while double chamber gravel filters can be equipped with systems of self-cleaning without water flow interruption. To prevent from corrosiveness filters are treated with phosphate acids and then covered with polyester electrostatic paint. Besides it’s possible to apply other paints made of other materials. Filters are supplied with a variety of connectors, such as sockets, flanged connectors compatible with all international standards. Max work pressure — 8 bar (116 psi). Can be supplied with additional functions such as self-cleaning.

    Disc filters

     

    Filters of fine cleaning are used to filter shallow waters from algae and grass. Main filter components are body, internal vertical element of filtering discs (cartridge) and cap. To clean the filter it’s necessary to take out a cartridge and wash it with water. Filtration rate- from 160 to 130 micron. To prevent from corrosiveness filters are treated with phosphate acids and then covered with polyester electrostatic paint. Besides it’s possible to apply other paints made of other materials. Filters are supplied with a variety of connectors, such as sockets, flanged connectors compatible with all international standards. Max work pressure — 8 bar (116 psi).  

    Fully-automatic hydraulic filter (horizontal)

     

    OPERATING PRINCIPLES As the water enters into filter inlet (1), it is pre-filtered through the coarse screen (3) to prevent the large particles ingress that will damage fine filter and internal parts. Then water flows into the second filtration section that contains multi-layered fine screen (4). This screen is protected by a robust coarse mesh that also provides a pre-filtration. While water passes through the fine screen towards outlet (2) the particles within the water accumulates on the inside surface of the fine screen and produce a dirt layer. As the dirt layer builds up on the screen, it will cause a pressure loss on the downstream side of the screen. The dirt layer itself will act as a filter and collect much smaller particles than the stainless screen. When the pressure differential reaches a certain level a back-flush should be started to clean fine screen. At a preset value (0.5 bar), back-flush control unit (12) opens cleaning discharge valve (9) and a strong back-flush flow that goes off to the atmosphere via drainage pipe (11) occurs. That flow creates suction effect in front of the nozzles (6) and sweeps the dirt collected on the fine screen. The dirty water sucked from the fine screen surface flows through collector pipe (7) and hydraulic turbine (8) and impels a rotary movement of the dirt collector while going off the drainage pipe. At the same time pressure drop in the hydraulic turbine (5) and drainage of piston (10) forces the dirt collector into axial movement. This turning and axial movements together create a helical movement that enables the suction nozzles sweep the entire screen area. When back-flushing is completed, dirt collector automatically back-flushes, returns to its original position and back-flushing is completed. During back-flushing, filtration continues.

    Code Diameter Т Length Inlet G1 Outlet G2 Filtration area Weight
    Н 6000 10″ 900 мм 2250 мм 6″ 6″ 6300 см2 120 kg
    Н 8000 12″ 1300 мм 2676 мм 8″ 8″ 8400 см2 180 kg