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Latex Scraping Self Cleaning Filter Automatic Operation For Dirty Water

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Shanghai LIVIC Filtration System Co., Ltd.
City: Shanghai
Province/State: Shanghai
Country/Region: China
Tel: 86-21-68173577-8024
Contact Person:
Miss Lyla Tan

Latex Scraping Self Cleaning Filter Automatic Operation For Dirty Water

Brand Name : LIVIC
Model Number : DFA
Certification : CE/ISO9001/SGS
Place of Origin : Shanghai
MOQ : 1 pc
Price : Negotiation
Supply Ability : 100pcs per year
Delivery Time : 6-8 weeks
Packaging Details : Wooden Case
Housing Material : 316L/CS/304
Filtration Degree : 50-2000μm
Viscosity : 1-800000cps
Flowrate Rang : 30-6500 m³/h
Design Pressure : 1.0MPa
Temperature : 200℃
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Latex Scraping Self Cleaning Filter, Mechanically Cleaned Bentonite Filtration


Latex scraping self-cleaning filter ( DFA FILTER for short), is the new high performance scraping self-cleaning filter independantly developed by LIVIC. It automatically removes the particles and impurities from the filter element internal surface by mechanical scraping and it can continuously work on-line. DFA is designed for filtration of high viscosity up to 800,000mPa.s. The filtration degree ranges from 50~1500μm. It can scrape the impurities off the filter element surface most quickly, which makes it more efficiently removing the impurities. It is applicable for water and various viscous liquid. The DFA filter is designed and manufactured by following LIVIC's high performance, high quality and high reliability standard. It is a world-class quality filter.

The conventional filters get clogged frequently when filtering the viscous liquid and removing the soft impurities. The customers have to select larger filters or clean the filter manually and freqeuntly, which means expensive investment, hard work, valuable liquid loss. DFA filter solves these kinds of problems by its advanced self-cleaning principle. It always keeps the filter element clean, discharges waste liquid with high impurity concentration, reduces the liquid loss. When filtering the viscous liquids such as dirty water, adhesives, resins, polymers and oils, DFA filter works more efficiently. DFA filter is taking place of the vibrating screen, bag filter, basket filter and some kind of back-flushing filter by its technical advantages and low running cost.


For DFA filter, LIVIC has developed about 20 specific ACS control system models, which are categorized into basic and advanced version. They are based on Simens LOGO!, run LIVIC's programs, efficiently control the filter and meet various automatic control requirements.
Basic version is the time control type. The cleaning cycle and the purging cycle are set by time cycle. No differential pressure instrument.

Advanced version has both differential pressure(D.P. for short) and time cleaning modes. The D.P. indicates the filter cake accumulation and the filter element clogging. When it reaches the preset D.P. value under D.P. mode, the cleaning sequences are triggered. The recommended D.P. value is 50KPa, which can be adjusted between 10 and 100KPa. The D.P. mode is the most efficient and widely applicable. The time mode can be set between 0 and 24 hours. If the D.P. mode fails, the time mode still works as the final safety protection. The preset time shall be close to the average cycle under the D.P. mode.

Advanced version reserves three dry contact points, which indicate the power status, cleaning status and failure feedback. The failure feedback includes the over-load D.P., valve action failure, scraper stucking. It monitors the filter, feedback the failure in time, prevent the equipment damage and prevent the liquid waste and pressure fluctuation in time because of the valve failure.

Two types of D.P. instruments available: one D.P. transmitter or two pressure transmitter as the combination measurement. The transmitter is sensitive and reliable and outputs the real time D.P..

The specified ex-proof class design is available. All instruments and control panel meet the ex-proof requirements. The control system based on the Simens S7-200 PLC is also available, can be configured into DCS and supports Profibus-DP or Modbus communication protocals.


Filter Main TypeDFA7DFA22DFA41DFA71DFA213DFA284
Filter Area(㎡)
Filter Element Qty.134
Inlet&Outlet SizeDN25-DN50DN50-DN80DN65-DN100DN80-DN125DN100-DN150DN150-DN250
Purge SizeDN40
Applicable Liquidwater and viscous liquid (<800000cps),impurities content<1000ppm
Filtration Degree50-2000μm
Standard Design Pressure1.0MPa,higher design pressure available
Design Temperature0-200℃(determined by seal materials)
Cleaning D.P.50-100KPa(differs by the liquid viscosity)
D.P. Instrumentpressure transmitter / differential pressure transmitter
Inlet&Outlet StandardHG20592-2009 Flange(standard, DIN compatible ), HG20615-2009 Flange ( ANSI B16.5 compatible)DIN11851 sanitary coupling, female thread
Filter Element SeriesMS/NS/AS
Housing Wet Part Material304/316L/CS
Piston Material316L
Scraper MaterialPTFE
Housing Seal MaterialNBR/EPDM/VITON/Silastic/FEP encapsulated Silastic
Element Seal MaterialNBR/EPDM/VITON/Silastic/FEP encapsulated Silastic
Piston Rod Seal MaterialNBR/PU/VITON
Purging ValveFull-port pneumatic ball valve, single action or double action, material 304/316
Facility Supply Requirement220V AC for control system, 0.4-0.6MPa clean and dry compressed air
Custom-made Design

jacket design for thermal oil or steam, keep the temperature and fluidity
ex-proof design includ

ing the instruments and control system, for flammable and explosive applications
food grade design, safety and sanitary, easier to clean


■ Applicable Industries: petro-chemical, fine chemical, pulp and paper, food and beverage, water treatment, etc.

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


■Up-and-down reciprocating scraping, scrape impurities off directly, especially good at viscous liquid filtration and removing viscous suspending impurities
■Simple structure, easy disassembly, pull the filter element out easily after removing the scraper, easy for internal cleaning
■Automatic operation, continuously on-line filtration, terminate the hard work of filter element replacement and cleaning
■No disposable filter media, save the cost of filter media consumption and the environment treatment
■Very low filtration pressure drop, steady flow rate, save the energy, good for keeping the process continuous and steady
■Closed filtration, prevent danger of liquid leakage, good for safety production and operator’s health

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