Disc filters are one type of filter used for removing insoluble contaminants from water. These units are widely applied in residential, industrial, agricultural and other fields. Today, disc filters are often used instead of screen filters, as they feature higher flow capacity and higher dirt-holding capacity of the filter cartridge.

Application：
This type of filter is used to remove insoluble impurities from water, such as sand, scale, rust and fine contaminants.

Working Principle：
Disc filtration units are equipped with a special filter module, which consists of a cartridge with a set of profiled polymer disc rings. When compressed, the discs form a spatial mesh structure that traps insoluble particles. Particles are retained by the grooved design of the discs. The filtration area of the cartridge equals the total surface area of all disc rings in the set, allowing a more compact filter size with improved impurity retention efficiency. For example, the filtration area of a 2″ module is 1.6 m².

In filtration mode, liquid flows through tightly closed discs from the periphery to the center, while insoluble particles are trapped in the gaps between the discs.

Backwashing Mode：
Filter backwashing is performed automatically by reversing the water flow direction.

Pressurized backwash water separates the discs, widening the gaps between them and flushing all trapped impurities into the drain. Backwashing of each filter unit usually takes about 10 seconds.

The unit is controlled by a programmable controller. The backwash cycle can be activated under four conditions: preset differential pressure, time interval, control module operation, or external signal.

Optimal Operating Conditions：
Minimum inlet pressure: 2 bar
Maximum operating pressure: 8 bar
Maximum temperature: ≤60 °C
pH range: 4–13