SFFILTECH is a brand supplier in dust collector bag house filtration, liquid bag filter filtration, and HVAC filtration systems.

Backwashing Automatic Filter Housing System DFX Series 1
Backwashing Automatic Filter Housing System DFX Series 1

Backwashing Automatic Filter Housing System DFX Series

Full automatic filtering housing system Full automatic outside scraper filter housing DFX series DFX series self cleaning filter housing (DFX filter for short) is DKD of independent research and development of efficient scraper type self-cleaning filter, by way of mechanical scraping to...


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    What is DFX filter housing?

    Full automatic filter housing system”

    Full automatic outside scraper filter housing DFX series;

    DFX series self-cleaning filter housing (DFX filter for short) is of sffiltech’s independent research and development of efficient scraper type self-cleaning filter. By using mechanical scraping to automatically cleaning particle impurity of outer surface of filter element to ensure continuous on-line filtration.

    DFX filter housing is mainly used for high precision filter, precision range 50-500 microns. It’s able to the maximum extent to avoid crushing the impurities, thus efficiently removing all of more impurities, suitable for high viscosity liquid filtration. Viscosity up to 800000 CPS.

    DFX filter follows the sffiltech’s high performance, high quality, high reliability design and manufacturing standards are of the international first-class quality. sffiltech is one of the world's leading manufacturer of self-cleaning filter . It has a full series of scraper type self-cleaning filter products, three sub series, applicable to different occasions, to fully meet the industrial customer’s variety of mechanical self-cleaning filtration requirements.


    woring principle of DFX filter housing

    Liquid inflow from filter inlet and from the filter element of outer surface flows past the filter element lower end connection outlet. Liquid outflow from the outlet .When the surface of the filter element is blocked to a certain amount of impurities, to perform the cleaning procedure at definite time or by setting the pressure difference.
    Gear motor drive slicker to erase impurities of outer surface of the filter element, impurities along the scraper leave the surface of the filter element. With the downward liquid falling to the bottom of the filter, the rotating sweep board sweeps the bottom impurity into the dirt collecting chamber. Impurities accumulate in collecting cavity and bottom of the filter, sewage valve timing automatically open, the liquid with high concentration of impurities is discharged from the discharge port. Residual liquid can be recovered or directly discharged.

    Technical features and advantages

    1) Full automatic operation, 24 hours of continuous online filtering, ends heavy filter element replacement and cleaning work;

    2) Low cost of material and high environmental protection with no disposable supplies.

    3) Using metal sheet scraper has excellent effect. Impurity removal ability was significantly improved and avoided crushing impurities.

    4) Top quality V-SLOT filter element, gap precision, extreme smooth surface, easy to scrape, high strength, long service life.

    5) The filter pressure loss is very small, the flow is stable, energy saving, and the conducive to stable techniques.

    6) Can be added to the back washing function as auxiliary cleaning filter element.

    7) Closed filtration, to prevent the leakage of hazardous materials, to ensure safe procedure.

    8) High concentration of waste liquid can be recycled, to avoid the loss of high value materials.

    9) A variety of module combination and automatic mode to meet the requirements of various filtration systems.

    10) The standard of international famous brand geared motor, high reliability, long service life.

    11) Standard feature of having the auxiliary cover lifting device, one person can operate easily.


    Volume (L)

    130 200 330

    Inlet and outlet size

    DN50-DN100 DN8O-DN150 DN8O-DN150

    Size of drain outlet

    DN50 DN50 DN80

    Motor/pneumatic motor drive

    0.18kw/0.33hp 0.18kw/0.5hp 0.25kw/0.5hp

    Suitable for liquid

    high viscosity liquid (<100000 cps) Impurity mass<1000ppm

    Filtering precision

    35-2000 μ m

    The standard design pressure

    rating is 1.0MPa, and higher can be customized

    Maximum design temperature

    0-200'C (depending on seals)

    Cleaning differential pressure


    Differential pressure transmitter group

    Differential pressure transmitter or pressure transmitter

    Inlet and outlet connection standard

    Flanges HG20592-2009 (standard design) HG20615-2009 (compatible with ANSI B16.5) 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000

    Filter element type and material

    V-SLOT slotted metal filter element material 316L S30408 S31608

    Shell wetted material


    Scraper material


    Shell sealing material

    NBR NBR rubber (standard)/VITON (FKM) fluoroelastomer silicone rubber

    Filter element sealing material

    NBR/EPDM/VITON/silicone rubber/FEP coated silicone rubber

    Piston rod sealing material


    Blowdown and slag discharge valve

    Pneumatic ball valve, protection grade IP65

    Utility supply requirements

    380V AC. 0.4-0.6MPa clean dry compressed air

    Main model of filter

    DFX420 DFX500 DFX650

    Filter face (nf)

    0.75 0.88 1.38

    V-SLOT high performance precision filter element

    X series DF filter housing is equipped with one of the world's highest quality V-SLOT gap type precision filter elements, has the following prominent advantages:

    1) Precision range 50-500 microns;

    2) Surface seam width precision, deviation is less than 5 microns.

    3) Main Body 316L material, excellent corrosion resistance.

    4) V type slot, which is not easy to block by the impurities, stable long-term flow.

    5) Outer surface and internal surface are smooth, easy to scrape off, minimum wear of scraper.

    6) Can filter stubborn impurities, such as mud and soft agglomerate.

    7) The surface is treated with special hardening and wear resistance, and the service life is prolonged remarkably

    8) High strength structure, if the differential pressure rises the gap keep not deformed

    9) Tolerance to high intensity front and back side pressure shock.

    We will make you the
    promptly response and best service.
    +86 020 - 2213 9352 / Amily Li
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    Shanghai Sffiltech Co., Ltd. is one of the leading & professional companies on the dust filtration & separation products in China
    Contact Us
    Office address: Room NO.5004, North-Buliding, New Cangyuan Tech Building, NO.951 Jianchuan Road, Minhang Disctrict, Shanghai China

    Factory address: 3#201, No.3255 Shengang Road, Songjiang District, Shanghai

    Contact person: Amily Li
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