CRAF Series Automatic Back-Flushing Filters

                                                                                              Accurate Positioning, One By One Reverse Washing

Introduction

CRAF series automatic backflushing filter is a new generation self-cleaning filtration system independently designed by Xing Wei Hui Da company,filter vessel are designed and manufactured according to the GB / ASME Steel Pressure Vessel Standard.
CRAF series automatic backflushing filter is integrated with a number of wedge slotted tube filter elements,it has the advantages of compact structure,large filtration area,small space,low pressure drop,less back flushing frequency as well as continuous automatic on-line filtration and cleaning,super high flowrate up to 7000m3/h in single filter,Its the advanced solution for the self-cleaning filtrationof water and low viscous liquids.
CRAF series automatic backflushing filters are widely used in iron and steel,metallurgy,electric power,papermaking, chemical,petroleum,pharmaceutical,food,mining,urban water supply and other fields.

Working Principle

CRAF series automatic backflushing filters main components include filter housing, filter elements, gear-motor, photoelectric positioning sensor, cleaning arm, drain valve, differential pressure sensor and control system.
Please click on the link to view the working principle of video

Technical Features And Adventags

     ■ Continuous automatic online filtration, no flow interruption when back flushing, reducing downtime and maintenance cost
     ■ Large filter area, low surface flow velocity, low pressure drop, accuracy fine filtration, less back flushing frequency
     ■ Metal Wedge Tubes high performance filter element, accurate and uniform slot, efficient back flushing, high strength structure, long service life over 10 years
     ■ Impulse back flushing one by one, high back flushing intensity, less time consuming, less back flushing water consumption
     ■ Water flows in the filter element from both ends, which increases the flux, allows the water flow freely to reduce the clogging and avoids clogging at one dead end of the element
     ■ Compact design, super high flowrate in single filter, saving installation space and construction costs prominently
     ■ High integration without many valves, fittings and seals, high reliability and low running cost
     ■ Vertical and Horizontal filter housings configurations and flexible Inlet and Outlet flange orientations are offered for most sizes, allowing custom arrangements to accommodate installation requirements.
     ■ High reliability in automatic control system , friendly Interface, easy to adjust the running mode to fit the service condition

Technical Specifications

        ■ Filter Fineness:5-3000μm         ■ Flow Rate:4.5-7000m3/h
        ■ DES.PRES (MPa):10bar(STD) / 16bar / 7bar         ■ DES.TEMP (°C):95℃
        ■ Housing Material:SS304 / SS316L / CS         ■ Filter Element Material:SS304 / SS316L
        ■ Driving Device:Gear Motor         ■ Arm Material: SS316L
        ■ Viscosity (cp):1-40         ■ Power Supply:AC380 & 50HZ
        Cleaning Start Mode
        ■ Difference Pressure Control
           Differential pressure indicator detects the pressure drop at both sides of the filter element reaches the set MAX allowed, The control system starts the cleaning action
        ■ Time Control
           Set the time of the time module in the control system and perform the cleaning action periodically. When the differential pressure start and time start simultaneously, differential pressure start priority
        ■ Manual Operationl
           The manual switch on the control panel can immediately start the cleaning procedure, which is usually used when the equipment is installed and debugged, the system maintenance or other needs

Model Technical Parameters 


    Model
                                                        Dimensions    mm
    Filtration area
          cm2

    Flow Rate
         m3/h
      L      L1      L2      L3      L4       H     H1     H2     H3     H4
    CRAF2     218     165     218      60     246    1010     918    607    220    100         2140       4.5 ~28
    CRAF4     223     171     223     102     246    1330    1015    801    276    115         3810       25 ~112
    CRAF6     302     241     302     120     260    1427    1147    894    300    117         6190       90 ~254
    CRAF8     362     298     362     160     299    1595    1310    1058    400    179         8250       200~450
    CRAF10     365     298     365     152     298    2091    1865    1301    399    170        12500       400~600
    CRAF12     424     349     424     160     260    2299    1953    1446    493    185        18750       550~860
    CRAF16     549     406     549     203     280    2454    2102    1595    600    221        37500     810~1698
    CRAF20     620     464     620     254     280    2497    2121    1615    598    200        55760     1500~2450
    CRAF24     697     584     697     300     280    2721    2326    1825    674    214        89100     2000~3600
    CRAF28     795     645     795     794      2901    2506    1937    700    223       106100     3000~5000
    CRAF36    1035    756    1035     300      3758    3345    2647    1000    215       180700     4500~7500
Note:
        ■ The decisive factors of filter flow are filter element type, filter fineness, liquid viscosity etc.
        ■ Filtration flow is not the only factor in determining the selection, the amount of pollutants, operating pressure drop, etc. are              important factors selection


APPLICATIONS
   
■ Applicable Industries:Chemical and petrochemical, pulp and paper,Electricity and energy, Iron and steel,
       Mining and metallurgy,Pharmaceutical and biology,Food and beverages, Automobile industry, Water
       treatment,machinery manufacturing,irrigation etc


    ■ Typical  Applicable Liquids:Reservoir water, freshwater, Groundwater, seawater, pond water, cooling circulating
         water, freezing water, high and low spraying water, squirt water, heat exchanging water, sealing water, bearing
         cooling water, recycled process water, machining coolant, cleaning agents, cleaning water, etc..

                                                                                                                                   


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