Working Principle:

  Dirty water enters from the filter inlet, first passing through a coarse filter screen to remove larger particles of impurities, then reaching the fine filter screen. During the filtration process, the fine filter screen gradually accumulates dirt and impurities from the water, forming a layer of filtered impurities. Since the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms between the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral suction scanner that moves up and down. It is hollow in structure, with several suction nozzles vertically distributed along its axis at certain intervals. The inside of the suction scanner is connected to a 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from the outside to the inside of the filter screen in reverse, washing down impurities attached to the inner wall of the filter screen into the suction nozzles, through the hollow shaft of the suction scanner, and then discharged through the drain valve. The entire cleaning process takes about 30-60 seconds, after which the pressure difference returns to normal, ending the cleaning cycle and returning to filtration mode. The system continues to flow during the cleaning process.

Product Parameters and Performance:

Flow Range: 15-800 t/h

Filter Element Type: Stainless steel woven (high precision), stainless steel wedge wire (low precision)

Filter Screen Material: 304, 316L

Filter Element Precision: 10-500um (sintered mesh), 100um-3000um (wedge wire mesh)

Standard Pressure: 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa, customized for special specifications

Shell Material: CS, 304, 316

Temperature: 0-85℃ (85℃-200℃ customized according to actual site conditions)

Control Box: PLC control (including remote signal)

Control Mode: Manual, pressure difference, time

Cleaning Time: 10-60 seconds

Cleaning Pressure Loss: 0.01Mpa

Product Size Table  

Precision Conversion Table

Equipment Installation Diagram 1

Figure 1

Diagram 2

Figure 2

Selection Guide:

1. Water treatment volume

2. System pipeline pressure

3. Actual site required filtration precision

4. Suspended solids content in the filtration system

5. Medium and chemical properties of the filtration system

 Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.