304 Pneumatic Driven Self Cleaning Filter For Polymer Coatings
DFA41
- Elimination or reduction in disposable filter bags and cartridges
for reduced operator handling inventory costs and landfill waste
- Reduction in product loss, more thorough contaminant purge in a
highly concentrated waste stream
- Virtually maintenance free, near 100% uptime
- Compact design, lower capital cost to fit most installations
- Stainless steel screens from 50 micron slots to 1/4" perforations
to handle a wide range of filtration needs
- Reduction or elimination of operator intervention for safer
operation
Specifications:
| Filter Main Type | DFA7 | DFA22 | DFA41 | DFA71 | DFA213 | DFA284 |
| Filter Area(㎡) | 0.07 | 0.22 | 0.41 | 0.71 | 2.13 | 2.84 |
| Filter Element Qty. | 1 | 3 | 4 |
| Volume(L) | ~4 | ~24 | ~42 | ~175 | ~620 | ~760 |
| Inlet&Outlet Size | DN25-DN50 | DN50-DN80 | DN65-DN100 | DN80-DN125 | DN100-DN150 | DN150-DN250 |
| Purge Size | DN40 |
| 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 |
| 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 |
| 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 |
| 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
|
Working Principle
[ Filtering Status ]
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.
[ Cleaning Status ]
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.
[ Purging Status ]
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.
Applications:
■ 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
