♦ Resins

♦ Metal Coating

♦ Decorating Coating

♦ Oil Painting

♦ Polymer

♦ Adhesives

♦ Raw Water

♦ Jet Fuel

♦ Latex

♦ High Viscosity Fluid Filtration 

DFA Mechanical Self-Scraping Filter (Internal PTFE Plunger)

DFA series internal automatic pneumatic scraping filter is the high efficient self-cleaning filter independently developed by LIVIC.

DFA filter is designed and manufactured per LIVIC’s high performance and high reliability standard with world class quality. DFA filter is designed for fine filtration ranging from 50-1500 micron and is capable of filtrating in high viscosity fluids up to 800,000 cps.

  • Compressed air drives piston moving up and down. Spring loaded PTFE disc connects to the piston and scrapes off the impurities on the filter element inner surface.

  • Automatic operation: Scraping cleaning motion is triggered by differential pressure or timing, whichever comes first. To reduce the liquid loss during purging, high impurity concentration waste liquid will be collected at the bottom funnel and discharged according to pre-programmed timing setting.

  • Optional semi-auto control: PCC (pneumatic cleaning controller) with one ON/OFF switch button. Easy to manual control self-cleaning and self-discharging motion.

  • No disposable filter media, save the cost of filter media consumption and the environment treatment

  • Low filtration pressure drop / Steady flow rate / Keep the process continuous and steady

DFA's self-cleaning function keeps the filter element/screen clean. It is triggered by differential pressure or timing, whichever comes first. Depending on the To reduce the liquid loss during purging, high impurity concentration waste liquid will be discharged. Instead of vibrating screen, bag filter, basket filter and other kinds of back-flushing filter, DFA filter works more effectively and efficiently in high viscous liquids such as dirty water, adhesives, resins, polymers and oil,


  • Applicable Liquid: water and viscous liquids (<800000 cps)

  • Impurity content:<1000ppm

  • Filtration Rating: 50-1500µm

  • Standard Design Pressure: 1.0 Mpa / 1.6 Mpa  

  • Design Temperature: 0 - 200°C (determined by the seal material)

  • Filter Area: ​0.07m² - 0.84m²

  • Volume: 4L - 760L

  • Flow Rate: 30-6500 m³/h

  • Housing Wet Part Material: 304 / 316L / CS

  • Inlet and Outlet Standard Flange: HG20592-2009 (DIN compatible), HG20615-2009 (ANSI B16.5 Compatible), AS2129 Table Flange, BSP/NPT screwed connection

  • Piston Material: 316L

  • Scraper Material: PTFE

  • Housing Seal Material: NBR/EPDM/VITON/Silastic/FEP encapsulated Silastic

  • Element Seal Material: NBR/EPDM/VITON/Silastic/FEP encapsulated Silastic

  • Piston Rod Seal Material: NBR/PU/VITON

  • Filter Element: 304/316L Wedgewire slotted metal filter screen / POR series laser-cutting pore screen

  • Scraping Blade Material: 304 / 316L

  • Cleaning Differential Pressure: 0.05 Mpa - 0.1Mpa

  • Differential Pressure Instrument: Differential pressure transmitter (DPT) / Differential pressure switch (DPS)

  • Gear Motor: 180 W, Three phase, 240V / 380V, Protection class IP 55, Worm reduction gear

  • Discharging Valve: Pneumatic ball valve, protection class IP65 / single action or double action, 304 / 316L

  • Supply Facility Requirement: 380V AC, 0.4 - 0.6 Mpa clean and dry compressed air

  • Optional Design: heating-insulated jacket design for thermal oil or steam to keep certain processing temperature and fluidity

  • Ex-proof Design: the instruments and control system can be designed for flammable and explosive applications

  • Food Grade Design: safety and sanitary, food grade surface polishing, easy to clean


  • Applicable Industry: petrochemical, fine chemical, pulp and paper, food and beverage, water treatment, etc.

  • Applicable Fluids: wax, coal oil, monomer, polymer, citric acid, fermented broth, cosmetics, silicon solution, soap, sorbitol, steroid sugar, wet end additives, adhesives, inks, lubricating oils, coatings, resin, rubber, ethanol, miscella, edible oil, juice, diesel, etc.