Pressure Filters

Pressure filters are designed for efficient removal of suspended matters including organic admixtures and ferric iron compounds from water. Different fillings are used as filtering material in pressure filters depending on designated use, e.g.: Birm, MZF, Titansorb, Filtersorb, Macrolite, Zeosorb and ion-exchange resins.
Filter represents a pressure body with top and bottom distribution systems installed inside it. Filter body is made of polyethylene reinforced with fiberglass, stainless steel or ferrous steel with a special anti-corrosion coating. The bottom distribution system may have different design (“star”, “snowflake”, etc.) made of slot offsets (beams) or represent a “false bottom” with installed slot filtering caps; the top distribution system normally represents a slot beam construction, diffuser or nozzle positioned in a straight position upward. There is a drainage gravel layer and filtering material removing certain admixtures from water inside the body above the bottom distribution system. Basic advantages of filters with granular filling are as follows: high dirt-holding capacity and possibility of long operation without being exchanged – due to a regular regeneration of filtering medium. Filter regeneration is carried out by loosening washing of filling by water or air-water jet in a reverse direction.

Types of fillings


- naturally occurring material – zeolite on the basis of aluminosilicates.
Filtering material Zeosorb removes particles up to 5 microns from water and may be used instead of quartz sand and other filtering materials both at engineering of new treatment facilities and reconstruction of current water treatment plants. It is characterized by high rates – up to 18 m3/m2 х h.
It is used in conventional water treatment technological workflows and requires no special regeneration of the filtering layer using any chemicals.


It may remove particles up to 3-5 microns from water. It has an optimum granule shape and strength that results to longer life cycle (up to 20 years).


It is used to eliminate iron and manganese from water. Insoluble iron and manganese compounds are precipitated and filtered in the filing layer. Deposit is removed by reverse flushing. No chemicals are required for material catalytic ability recovery. Dissolved oxygen shall be in water at filtering.

Activated Charcoal

Carbon, Aquasorb, BAU, etc. are used to remove residual chlorine, odor, aroma and color. Granulated activated charcoal is an excellent filtering medium characterized by effective absorption parameters. Activated charcoal only requires regular reverse flushing to wash out deposits. Charcoal replacement frequency directly depends in chemical composition of treated water and varies within 1 – 3 year.


Catalyst material, which in case of initial water contact results in carbonate hardness crystals growth on its surface. Carbonate hardness structure changes while remaining the initial water composition without any changes. No crystal precipitates, but remains in water in a stable condition even at temperature of 100°C. Thus, the amount of carbonate hardness in treated water is not limited.

Ion-Exchange Resin

It is used to soften drinking water both under industrial and domestic conditions. Ion-exchange resin refers to the group of strongly acidic jellylike cations on the basis of styrene-divinylbenzene copolymers. Product granules have a uniform diameter (monodisperse distribution) and characterized by high chemical, mechanical and osmotic stability.

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