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Petrochemical Self Cleaning Filter High Reliability Standard DFA Series
|Housing Material||304/316L/CS||Filtration Degree||50-2000μm|
|Viscosity||1-800000cps||Flowrate Rang||30-6500 M³/h|
Self Cleaning Strainer,
Vibrating Screen Filter
Additive Mechanical Self Cleaning Filter, DFA Series for Polymer and Coatings Filtration
DFA series pneumatic 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.
Liquid enters the filter from the inlet. The spring-loaded disc-shape scraper tightly fits the filter element internal surface and stops at the top of the filter element. The liquid passes the scraper and flows across the filter element from inside to outside. The impurities are blocked on the inner element surface. The liquid flows out from the outlet. After running for a period, more and more impurities accumulate and the pressure drop increases. Clean the filter element by the preset differential pressure or the preset time cycle.
The cylinder drives the scraper moving up and down and cleaning the filter element. When the scraper moving down, the impurities are pushed down to the filter bottom, and gravity particles settle down to the impurity collection chamber. When the scraper moving up, the remaining impurities are pushed to the top of the filter element and then flushed off by the liquid. The impurities pass the scraper, get back the filter element internal surface and then scraped off when the scraper moving down. Each cleaning cycle consists of several strokes. After cleaning, the filter element are regenerated. When cleaning, it filters normally and flowrate is not interrupted.
After several cleaning cycles, the impurities accumulate more and more. Open the valve periodically and purge the waste liquid of high impurity concentration, which can be recovered if necessary.
|Filter Main Type||DFA7||DFA22||DFA41||DFA71||DFA213||DFA284|
|Filter Element Qty.||1||3||4|
|Applicable Liquid||water and viscous liquid (<800000cps),impurities content<1000ppm|
|Standard Design Pressure||1.0MPa,higher design pressure available|
|Design Temperature||0-200℃(determined by seal materials)|
|Cleaning D.P.||50-100KPa(differs by the liquid viscosity)|
|D.P. Instrument||pressure transmitter / differential pressure transmitter|
|Inlet&Outlet Standard||HG20592-2009 Flange(standard, DIN compatible ), HG20615-2009 Flange ( ANSI B16.5 compatible)DIN11851 sanitary coupling, female thread|
|Filter Element Series||MS/NS/AS|
|Housing Wet Part Material|
|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|
|Purging Valve||Full-port pneumatic ball valve, single action or double action, material 304/316|
|Facility Supply Requirement||220V AC for control system, 0.4-0.6MPa clean and dry compressed air|
jacket design for thermal oil or steam, keep the temperature and fluidity
ing the instruments and control system, for flammable and explosive applications
MS SERIES FILTER ELEMEN
Long slot screen. Interal slot width defined as the filtration degree. Wider outer slot width. The slot section shape is isosceles trapezoid. Rarely clogged, steady flowrate. high opening rate, uniform slots, filtration degree 50~1500μm. The scraper scrapes along the slots. For common filtration. Smooth and flat internal surface. Good roundness for being easily scraped clean. Solid and durable. 316L screen material, excellent chemical resistance. Good at filtering difficult impurities such as oil mud, soft particles, etc..
|NS SERIES FILTER ELEMENT|
Manufactured by the advanced micro-fabrication technology. Short slot screen. Internal slot width defined as the filtration degree. Wider outer slot width. The slot section shape is isosceles trapezoid. Rarely clogged, filtration degree 125~500μm. For accurate filtration, efficiently remove particles larger than the filtration degree. For high filtration quality applications. Smooth and flat internal surface. Good roundness for being easily scraped clean. 316L screen material and excellent chemical resistance. Durable harden internal surface. Good at filtering difficult impurities such as oil mud, soft particles, fibers, etc..
|AS SERIES FILTER ELEMENT|
Manufactured by the advanced micro-fabrication technology. Pore screen. Internal pore diameter defined as the filtration degree. The outer pore diameter is larger. The pore channel is horn-shape. Rarely clogged, filtration degree 50~1000μm. Round pore for absolute accurate filtration, 100% remove the particles larger than the filtration degree. For extremely high filtration quality applications. Smooth and flat internal surface. Good roundness for being easily scraped clean. 316L screen material and excellent chemical resistance. Durable harden internal surface. Good at filtering difficult impurities such as oil mud, soft particles, fibers, etc..
■ 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.
TECHNICAL FEATURES AND ADVANTAGES
■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