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      Hotline0513-83351077

      Service Hotline:0513-83351077 Tel:0513-833519400513-83841007
      Fax:0513-83351087
      Sucking-type auto-washing filter (SPFZ-S type)
      Features
      SPFZ-S type filter adopts NRV speed reducer. The shell is aluminum alloy cast structure in characteristic of good radiation, low noise and lightweight and heavy pressure bearing capability.
      The sealing device of SPFZ-S type filter adopts double-end sealed structure with enhanced tetrafluoroethylene in accordance with CV62.1-85 standard. The filter features reliable
      sealing, long lifetime and heavy pressure bearing capability.
      SPFZ-S type filter is designed with discharge valve on the top which features compact structure and sensitive opening and closing function.
      The differential controller system adopts D520/7DD switch to adjust differential controller, thus guaranteeing correct signal feedback and its sensitivity.
      SPFZ-S type filter adopts multiple filter element structure, featuring large filtering area, low-pressure reduction and high backwashing efficiency.
      The cartridge plate is made of stainless steel which implements filtration process at the working interface of backwashing sucking disc.
      The backwashing sucking disc adopts reinforced tetrafluoroethylene structure and backwashing auto-handling mechanism to guarantee longtime sealing between the sucking disc and the cartridge, which enhances the backwashing effect.
      The electrical control system adopts PLC programmable controller. The washing mode adopts parallel mode of differential control, time control and manual control. Time fixing and location washing mode can obtain lower flow rate and thorough backwashing.
      No flow failure during backwashing.


      Applications
      Industrial sewage
      Filtration of circular water
      Regeneration of emulsion
      Filtration of waste grease
      Continuous cast water supply system of Metallurgical industry
      High pressure water used for steel rolling in furnace system

      Working principle
      The SPFZ-S type filter consists of a shell body, multiple filter elements, a backwashing mechanism, an electric control system, a power unit, an electric sewage valve and a differential control system. In the shell body, the cartridge card divides the internal cavity into up cavity and down cavity. In the up cavity, there are multiple filter elements, which reduce the volume of the filter body. In the down cavity, there is a backwash-sucking disc. During operation, the dirty liquid enters the filter through tin inlet and then into the inner cavity of filter elements through holes on the cartridge. Particles bigger than the hole will be cut off. The purified liquids will flow out from the up cavity.
      When dusts are accumulated at the cartridge surface and the pressure difference in the inlet and outlet locations become bigger than the predefined value or the timing device reaches predefined time interval, the electric control system will send a signal to drive the backwashing mechanism. When the backwashing sucking disc opening become opposite to the cartridge inlet, the sewage valve will be open, the filter system begins sewage discharge. A negative pressure region will appear in the sucking disc and the inner side of cartridge. As a result, it forces part circulation liquid into the inner side of cartridge. Dusts remain on the inner side of cartridge will into the sewage discharge chamber with liquid flow and flow out from the sewage discharge valve. The specially designed filter cartridge presents good injecting effects to wash out any kinds of dust. When pressure difference in the inlet and outlet locations become normal or the timers setting interval ends, the motor will stop running, the sewage discharge valve will close. During whole process, now stream fails. The backwashing operation not only features less water consumption but also implements continuous and automatic operation.

      Technical parameters
      Maximum flow rate

      3000m3/h

      According to the filtering precision and impurity content to this company, my company to provide the most appropriate machine
      Minimum working pressure 0.4Mpa(g)  
      Minimum working pressure 1.6Mpa(g) special on customer request
      Diameter of inlet and outlet DN50 ~ DN700 flange standard HG20592-97, special on customer request
      Minimum working temperature 80 special on customer request
      Filtering accuracy 25~3000m  
      Screen material provide 304,316,316Lstainless steel on requests  
      Equipment material Provide Carbon steel or 304,316,316L stainless steel on requests  
      Motor power 0.37~0.75KW  
      Power voltage 380V, 50Hz, 3-phase  
      Backwashing flow rate less than 1~2% of overall flow  
      Backwashing time 60  
      Backwashing pressure difference 0.5kg/cm2 Set by process demand
      Notes:
      Because the features of material are different, the company can provide design of particular filters requested by the customers. The customer should detail related parameters such as flow rate (m3/h), filtering precision (m), pressure (Mpa), density (kg/m3), viscosity ( CP ). Please contact the company for erecting drawings.

      Standard level of filtration
      Filter type
      Drilling
      Wedge shaped filter
      Woven screen
      µm
      3500
      2500
      1500
      800
      500
      300
      200
      200
      130
      100
      80
      50
      25
      mm
      3.5
      2.5
      1.5
      0.8
      0.5
      0.3
      0.2
      0.2
      0.13
      0.1
      0.08
      0.05
      0.02
      mesh
      4
      6
      10
      20
      30
      50
      75
      75
      120
      155
      200
      300
      450
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