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VELP Scientifica Flocculators - JLT Series

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Flocculators - JLT Series

Flocculators with multiple stirrers to allow standard conditions to be met during analysis, a basic requirement in order to obtain reliable and repeatable results. 
 
Standardized Control
 
  • Digitally selectable speed from 10 to 300 rpm 
  • Microprocessor controlled operating time for unattended operation 
  • Identical speed and time for all positions for comparable results 
  • Reliable and repeatable results from VELP stirring quality 
  • Precise speed from an electronically controlled DC gear motor 
     
    Practical Operation 
  • Choice of 4- or 6-place models 
  • JLT 4, 4-position jar tester 
  • JLT 6, 6-position jar tester 
  • High visibility LED displays for speed and time 
  • Illuminated back panel to simplify sample observation 
  • Stirring rods adjustable in height without tools 
     
    Robust Design 
  • Strong resistance to chemical and mechanical corrosion
  • Models

    JLT 4
    Attributes

    Edit Model

    Stirrer Control Electronic
    Stirring Speed Range 10 to 300 rpm
    Construction epoxy painted metal structure
    Depth 260 mm
    Height 347 mm
    Width 645 mm
    Power Requirements 100-240 V / 50-60 Hz
    Weight 13 kg
    Additional Specifications Back panel:
    disconnectable illuminated

    Stainless steel stirring rods:
    adjustable in height by a selfblocking chuck

    DC gear motor

    Monoselector:
    same speed for each rod

    Speed setting interval:
    1 rpm

    Microprocessor controlled timer:
    0÷999 min or 0 ÷99 hours (or continuous)
    JLT 6
    Attributes

    Edit Model

    Stirrer Control Electronic
    Stirring Speed Range 10 to 300 rpm
    Construction epoxy painted metal structure
    Depth 260 mm
    Height 347 mm
    Width 935 mm
    Power Requirements 100-240 V / 50-60 Hz
    Weight 17 kg
    Additional Specifications Back panel:
    disconnectable illuminated

    Stainless steel stirring rods:
    adjustable in height by a selfblocking chuck

    DC gear motor

    Monoselector:
    same speed for each rod

    Speed setting interval:
    1 rpm

    Microprocessor controlled timer:
    0÷999 min or 0 ÷99 hours (or continuous)

    Features

    Intuitive Parameters Setting, Digital Display 
    JLT Series, with 4- or 6- position Floc Tester, offers continuously variable stirring speed (if required), up to 300 rpm and settable through the relative digital display located on the front panel. 
     
    In addition, the user can program the operating time for unattended operation, through a second digital display. When time expires, stirring will be stopped automatically. An illuminated back panel simplifies the observation of the samples, whilst height adjustment option for the stirring blades during operation increases its capabilities. 
     
    What is JAR TESTING? 
    Jar testing is a pilot-scale test of the treatment chemicals used in a particular water plant. In few words, it simulates the coagulation/flocculation process in a water treatment plant, helping the operator in the determination of the right amount of treatment chemicals, and, thus, in improving the plant’s performance. 
     
    Jar testing entails adjusting the amount of chemicals and their sequence in which they are added. The sample requires to be stirred so that the formation, development, and settlement of floc can be watched just as it would be in the fullscale treatment plant. 
    The operator then performs a series of tests to compare the effects of different amounts of flocculation agents at different pH values to determine the right size floc. 
     
    Few operations are required for a correct test: 
  • For each water sample, usually raw water, a number of beakers (jars) are filled with the same amounts of water sample 
  • Each beaker is treated with different doses of chemical; other parameters may be altered besides dosage, including chemical types, mixing rate, aeration level/time, filtration type, etc. 
  • Then, by comparing the final water quality in each beaker, the effect of the different treatment parameters can be determined and the best formula can be reproduced on large scale
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    graph relation between velocity gradient and rpm

    Dear all'  I would like to send me the relation between velocity gradiant with the rotation per min for impller due to my Phd study. Regards Sara

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