The fully automatic backwashing filter is a high-efficiency water filtration system that uses automatic backwashing technology to effectively remove suspended solids and particulate contaminants from water streams.
Its working principle is based on the filtration process in which water passes through the filter element, while impurities are captured and accumulated on the filter surface.
When the accumulated contaminants reach a preset level, the filter automatically initiates the backwashing cycle. Clean water flows in the reverse direction to remove impurities from the filter element, after which the system automatically returns to normal filtration operation. This process requires no manual intervention, significantly reducing maintenance costs while maintaining stable filtration performance.
Fully automatic backwashing filters are widely used in industrial water treatment, wastewater treatment, irrigation, and water supply systems. They are especially suitable for applications requiring continuous operation, low maintenance, and highly automated filtration.
The fully automatic backwashing filter is a high-efficiency water filtration system that utilizes automatic cleaning technology to effectively remove suspended solids, particles, and other contaminants from water streams.
During the filtration process, raw water passes through the filter element, where impurities are captured and accumulate on the filter surface. As contaminants build up and the filtration resistance increases, the system automatically detects the preset cleaning condition and initiates the backwashing cycle.
During backwashing, clean filtered water flows in the reverse direction through the filter element, flushing away accumulated contaminants and discharging them through the drain outlet. After cleaning, the system automatically returns to normal filtration operation without interrupting the overall process.
With fully automated operation, low maintenance requirements, and stable filtration performance, the backwashing filter is widely used in industrial water treatment, wastewater treatment, irrigation, and water supply systems. It is particularly suitable for applications requiring continuous operation, reliable filtration, and reduced manual maintenance.
The fluid containing impurities enters the bottom chamber (1) of thefully automatic filter. The fluid velocity decreases in this chamber, andthe fluid continues to flow upwards, passing from the inside out throughthe specially arranged and sealed filter element assembly (2) in the filterchamber. Impurities are intercepted on the inner surface of the filterelement, and the filtered clean fluid flows out through the outlet (3).Backwashing is accomplished by utilizing the pressure differencebetween the pipeline pressure and atmospheric pressure. When thedifferential pressure transmitter (4) is drivento rotate by the motor (5), and the drain port (6) opens. At this time, thedrain port is connected to the atmosphere, creating a pressuredifference. The clean fluid on the outside of the filter elementbackwashes the filter element assembly. The backwashing suction deviceselects the dwell time for each filter element assembly based on theimpurity characteristics and backwashes each set of filter elementassemblies in the filter chamber one by one.When the differential pressure returns to its initial value, the drain valvecloses, the motor stops driving, and the filter continues to filter. Theentire process is continuous, and the backwashing water volume is small,without affecting the outlet pressure.The control system (7) can be remotely controlled by DCS, and thebackwashing time is adjustable.
Fluid enters the filter and solid particles are captured by the filter element.
When preset pressure or time is reached, the system automatically initiates backwashing.
Removed particles are flushed out through the drain outlet.
Differential pressure is continuously monitored to detect filter contamination.
Clean fluid flows in reverse direction to remove trapped contaminants from the filter surface.
The system resumes normal filtration without interrupting operation.
| Model | Approximate Dimensions (in) | Pipe Diameter (in) | |||
|---|---|---|---|---|---|
| A | B | C | D | Inlet/Outlet | |
| XD-4 | 54 | 11 | 36 | 12 | 4" |
| XD-6 | 57 | 11 | 38 | 16 | 6" |
| XD-8 | 61 | 12 | 40 | 20 | 8" |
| XD-10 | 64 | 12 | 42 | 28 | 10" |
| XD-12 | 68 | 14 | 42 | 28 | 12" |
| XD-14 | 72 | 14 | 42 | 32 | 14" |
| XD-16 | 88 | 14 | 46 | 40 | 16" |
| XD-20 | 96 | 15 | 48 | 56 | 20" |
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An Automatic Backwash Filter is a self-cleaning filtration system that removes suspended solids from liquids and automatically cleans the filter element through a reverse flow (backwash) process without shutting down the system.
During normal operation, fluid passes through the filter element and solids are retained. When a preset differential pressure or timer is triggered, the system initiates backwashing, reversing flow to remove accumulated contaminants and restore filtration efficiency.
Key advantages include continuous operation without downtime, reduced manual maintenance, stable filtration performance, longer filter lifespan, and lower operational costs.
These systems are widely used in water treatment, petrochemical processing, power plants, steel industry, irrigation systems, and industrial process filtration where continuous operation is required.
Automatic backwash filters clean themselves using programmed or pressure-triggered cycles, while manual filters require shutdown and manual cleaning or replacement, resulting in higher downtime and labor costs.
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