Laminated filter

All-plastic disc filter
Precise filtration: Different precision filter discs can be selected according to water requirements, with various specifications.
Efficient cleaning: High-speed, thorough backwashing can be completed in about 20 seconds.
Fully automatic operation, continuous water output: In the filter set, the backwashing process is carried out alternately, and automatic switching between working and backwashing states ensures continuous water output and low system pressure loss.
Standard: Standard modular system design, flexible and interchangeable, and can be added or removed as needed.
Non-standard: Flexible use of corner space, adaptable installation, and small footprint.
Reliable operation, simple maintenance, almost no daily maintenance is required, no special tools are needed, and very few spare parts are needed.
Long service life: High-tech plastic filter element, strong, wear-free, corrosion-free, verified by years of industrial use, the filtering and backwashing effects will not deteriorate with the increase of use time.
　　Different types of filters in filtration equipment are suitable for different water quality requirements. As a deep filtration device, the disc filter is mainly composed of a tank shell, discs, inlet and outlet, and drain port. The material is usually high-quality engineering plastic with extremely high wear resistance. Supported by stainless steel springs, the structure is strong. One side of the disc is a continuous radial rib, and the other side is a set of concentric annular ribs; discs of the same specification are pressed and assembled in the same way to form a cylinder with a huge filtration surface area. When the filter is working, the water flows from the inlet into the tank, from the outer ring of the disc through the rib gap to the inner ring, and the impurities in the water are retained in the impurity retention area between the discs, and the purified water flows to the outlet through the inner ring of the disc.
   When using a disc filter, pressure gauges should be installed at the inlet and outlet respectively, so that the pressure difference between the inlet and outlet can be used to judge the degree of blockage of the disc gap and the water quality of the effluent. If the pressure difference between the inlet and outlet exceeds the specified value, backwashing should be carried out.

The steps for backwashing the disc filter are as follows:
(1) Open the drain valve;
(2) Close the outlet valve;
(3) Reciprocate the tank shell until the water discharged from the drain valve becomes clear.
(4) Open the outlet valve and close the drain valve.
The disc filter has the following characteristics:
(1) In filter equipment of the same volume, the disc filter has a larger filtration surface area.
(2) The water flow resistance is small, so the operating cost is low.
(3) The debris retention space is large, which means that the backwashing frequency is low.
(4) During backwashing, you only need to gently rotate the tank a few times without disassembly, and it can be completed in a few tens of seconds.

　　The filtration degree of the disc filter for impurities in the water depends on the height of the circumferential ribs. The Manufacturer usually uses the color of the disc to distinguish its filtration accuracy. During planning and design, it should be reasonably selected according to the water quality conditions and the requirements of the sprinkler irrigation system.

Working principle
The filter element of the disc filter, the disc is the impurity treatment carrier, which is composed of a set of plastic discs with different directional grooves on both sides superimposed on each other. The groove edges on the adjacent surfaces form many intersections, which constitute a large number of cavities and irregular passages. These passages gradually decrease from the outside to the inside. During filtration, these passages cause water turbulence, which ultimately causes the impurities in the water to be intercepted at various intersections. If the discs are stacked and installed on the filter core frame, under the action of the spring and the water pressure, a loose outer and tight inner filtration unit is formed. The discs pressed together by the spring and water pressure in each filtration unit form countless filter screens that impurity particles cannot pass through. The disc width is 12-14 mm, and the disc material is high-quality engineering plastic with extremely high wear resistance. Supported by stainless steel springs, the structure is sturdy. The backwashing water flows along the inner wall of the disc in a tangential direction from the inside to the outside to wash away various impurities adhering to the surface of the disc. The disc rotates under the action of the backwashing water flow, ensuring that all impurities are effectively cleaned and discharged. The time interval and pressure difference can control all steps of backwashing. Once set, it can be used for a long time. The automatic backwashing filter completes the entire automatic backwashing process in a few seconds without interrupting operation. The filter using this filtration principle has a dynamically variable gap between the discs during filtration and backwashing, which is very beneficial to improving filtration performance and water quality, and can greatly reduce the amount of backwashing water, usually about 0.25%. The different depths and number of grooves on the disc determine the filtration accuracy of the filtration unit.

Working principle of the filtration stage
Water flows through the filter inlet into the filter. When passing through the filter disc, the filter disc is tightly pressed together under the action of spring force and water force. Impurity particles are trapped at the intersection of the discs. The filtered water flows out from the main channel of the filter. At this time, the one-way diaphragm valve is in the open state.
Fully automatic operation, continuous water output
　　Time and pressure difference control backwashing start. In the filter system, each filter unit and workstation are backwashed in sequence. Automatic switching between working and backwashing states ensures continuous water output, small system pressure loss, and filtration and backwashing effects will not deteriorate with use time.

Modular design
　　Users can add or remove the number of parallel filter units as needed, flexible and changeable, and highly interchangeable. It can flexibly utilize the corner space on site and install it in a space-saving manner according to local conditions.

Easy maintenance
　　Almost no daily maintenance is required, and no special tools are needed for inspection. There are very few detachable parts.

　　Like other filters, a disc filter consists of a filter housing and a filter element; the filter housing material is generally plastic, stainless steel, or plastic-coated carbon steel, and there are many shapes; the filter element is a hollow cylinder, which is composed of many annular plastic sheets with micron-level equilateral triangular grooves on both sides assembled on a central skeleton. The discs compressed by springs and water pressure in each filtering unit form countless screens through which impurities cannot pass, with a total thickness equivalent to 30 layers of ordinary filter screens.

　　The automatic disc filter is equipped with an electronic control device, which can control all steps of backwashing using time intervals and pressure difference. Once set, it can be used for a long time. The automatic backwashing filter completes the entire automatic backwashing process in a few seconds without interrupting operation. The backwash is automatically started by the set time or pressure difference signal, the backwash valve changes the water flow direction in the filter unit, the spring on the filter core is pushed open by the water pressure, and all the discs and the small gaps between the discs are loosened. The nozzle in the center of the filter core sprays water in a tangential direction, causing the discs to rotate. Under the scouring of the water flow and the centrifugal force of the high-speed rotation of the discs, the objects retained on the discs are washed away, so a good cleaning effect can be achieved with a very small amount of backwash water. Then the backwash valve returns to the filtering position, and the spring on the filter core presses the discs again, returning to the filtering state. The backwash water is all filtered water from the system.
Precise filtration
　　Different precision filter discs can be selected according to water requirements. There are various specifications such as 20 microns, 55 microns, 100 microns, 130 microns, 200 microns, and 400 microns, and the filtration ratio is greater than 85%. Thorough and efficient backwashing Because the filter pores are completely opened during backwashing, coupled with the centrifugal jet action, a cleaning effect that other filters cannot achieve is achieved. Each filter unit backwashing process only takes 10 to 20 seconds. Fully automatic operation, continuous water output Time and pressure difference control backwashing start. In the filter system, each filter unit and workstation are backwashed in sequence. Automatic switching between working and backwashing states ensures continuous water output, small system pressure loss, and filtration and backwashing effects will not deteriorate with use time. Modular design Users can add or remove the number of parallel filter units as needed, flexible and changeable, and highly interchangeable. It can flexibly utilize the corner space on site and install it in a space-saving manner according to local conditions. Easy maintenance Almost no daily maintenance is required, and no special tools are needed for inspection. There are very few detachable parts.

　　The stacked filter core is composed of a set of discs with grooves on both sides. The intersection points formed by the groove edges can intercept solid matter in the water. Because it has both surface interception and deep coagulation, the filtration effect is greatly improved.
Features:
1. Long service life: The high-tech plastic filter core is sturdy, wear-free, and corrosion-free. It has been verified by years of industrial use, and the filtration and backwashing effects will not deteriorate with use time.
Efficient backwashing: High-speed and thorough backwashing can be completed in about 7-15 seconds, and the backwashing water consumption is less than 0.5% of the filtered water.
Standard modularization: Standard modular system design, users can configure as needed, simple and flexible, and highly interchangeable.
Reliable operation and simple maintenance: Almost no daily maintenance is required, installation and operation are convenient, components are 100% factory tested and trial-run, no special tools are required, and very few spare parts are needed.
2. Precise filtration: Different precision filter discs can be selected according to water requirements. There are various specifications such as 20 microns, 55 microns, 100 microns, 130 microns, 200 microns, and 400 microns, and the filtration ratio is greater than 85%.
Thorough and efficient backwashing: Because the filter pores are completely opened during backwashing, coupled with the centrifugal jet action, a cleaning effect that other filters cannot achieve is achieved. Each filter unit backwashing process only takes 10 to 20 seconds.
Fully automatic operation, continuous water output: Time and pressure difference control backwashing start. In the filter system, each filter unit and workstation are backwashed in sequence. Automatic switching between working and backwashing states ensures continuous water output, small system pressure loss, and filtration and backwashing effects will not deteriorate with use time.
Modular Design: Users can add or remove filter units in parallel as needed, offering flexibility and interchangeability. It allows for flexible utilization of on-site corner spaces and space-saving installation based on local conditions.   `nbsp_tag
Easy Maintenance: Requires virtually no daily maintenance; inspection does not require special tools, and few parts are removable.

The 3-inch stacked filter element consists of a set of grooved discs. The intersecting edges of the grooves trap suspended solids in the water. Due to the combined effects of surface interception and depth coagulation, the filtration efficiency is significantly improved. Simultaneously, because the stacked filter system features highly efficient backwashing, fully automatic continuous operation, low self-water consumption, small footprint, and reliable operation, the backwashing process of the filtration system is performed alternately, automatically switching between working and backwashing states to ensure continuous water output and low system pressure loss. Therefore, the technical advantages of the stacked filter system are quite obvious.
In order to achieve automatic backwashing of the stacked filter, high-flow stacked filter stations are typically composed of multiple units.
*The filter unit is made of a high-pressure resistant polyamide shell reinforced with fiberglass, secured with easy-to-open stainless steel clamps.
*The filter element frame is a complex and precise telescopic columnar structure, molded in one piece. The hydraulic actuating mechanism is located inside the highly sealed columnar structure, effectively preventing blockage and failure, extending its service life.
*High-strength polypropylene sheets, under the pressure of the filter element, form a solid columnar filtration system, providing reliable filtration for various precision requirements.
*The filter's inlet and outlet pipes are made of pure plastic polyethylene for better corrosion resistance.
Filtration Mode: In the filtration state, turbid water passes through the stacked plates from the outside of the filter element. Under the action of spring force and hydraulic force, the stacked plates are tightly pressed together, and the impurities are trapped at the intersection of the plates. The filtered clean water flows out of the filter.