DVI Digital Flocculator Jar Test Apparatus (4 Stirrers)
Product Overview and Application
The Jar Test Apparatus, also widely known as a Digital Flocculator or Multiple Spindle Stirrer, is a high-precision laboratory stirring instrument designed for critical water treatment and testing applications. This instrument is fundamental for stimulating the flocculation process in a controlled lab environment, which is crucial for determining the correct amount of chemical coagulants needed for large-scale water purification.
This 4-stirrer model allows for the simultaneous analysis of four different water or effluent samples under identical test conditions. It is specifically designed for use in:
• Water Treatment Plants (WTP)
• Effluent Treatment Plants (ETP) and Sewage Treatment Plants (STP)
• R&D laboratories and Industrial Complexes
• Correctly estimating the dosing of alum and other coagulants.
Core Functionality and Operating Principle
The DVI Jar Test Apparatus operates by stirring samples uniformly at controlled, low RPM speeds. This low-speed agitation provides essential information regarding the coagulation and flocculation of the untreated water.
Key Operational Highlights:
• Precise Coagulation Test: The instrument ensures efficient and economical handling of flocculation matter and collides. Jar testing helps determine the minimum coagulant dose required to meet specific water quality objectives.
• Variable Speed Control: The unit is fitted with a DC motor and electronic speed regulator, providing variable speed capabilities. The variable speed typically ranges from approximately 20 R.P.M. to 100 R.P.M. for heavy-duty models, allowing operators to mimic different mixing stages found in full-scale treatment plants.
• Digital Accuracy: An integrated digital display provides accurate results for the rotational speed (RPM) and a digital timer supports programmed mixing cycles.
Durable Design and Construction
This model is built for rigidity and longevity in demanding laboratory environments, featuring robust construction elements:
• Body: The external housing is made from durable Mild Steel (MS) material, often finished with a protective powder coating to enhance resistance to chemical and mechanical corrosion and provide an aesthetic outer appearance.
• Stirring Spindles: The unit features four spindles, each fitted with Stainless Steel (SS) stirring paddles (approximately 1" x 3"). The use of stainless steel ensures resistance to corrosion.
• Uniform Drive: A mechanical gear chain ensures that all four stainless steel stirring paddles rotate at precisely the same speed.
• Adjustable Height: The stirring rods (approximately 10 inches long) are equipped with a lighting knob that permits easy adjustment of the paddle height according to testing requirements.
• Sample Visibility: The apparatus features built-in illumination, often provided by diffused cold light or a white LED light, located beneath the beakers. This illumination allows the user to clearly and easily observe the formation, size, and settling of the floc samples.
User Experience and Controls
The DVI Jar Test Apparatus is designed for ease of use and accurate data recording:
• Beaker Compatibility: The spacing (approximately 6 inches between rods) permits the use of standard glass beakers, typically 1000 ml (1 litre) to 2 litres in capacity, which rest directly on the bench.
• Advanced Digital Controls: Control options often include a touch-sensitive keypad and an LED or LCD display showing RPM and time.
• Programmable Testing: The digital timer typically supports timing from 0 to 99 minutes. Some advanced versions may offer pre-set programs, allowing routine speed and time parameters to be saved and recalled instantly
Technical Specifications: DVI Jar Test Apparatus (4 Stirrers)
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Parameter
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Detail
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Number of Stirrers/Jars
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4 Stirrers/Jars
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Body Material
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Mild Steel (MS), typically Powder Coated
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Stirring Paddle Material
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Stainless Steel (SS)
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Speed Range (Variable)
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20 R.P.M. to 100 R.P.M. (Approx.)
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Motor Type
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D.C. Motor with Electronic Speed Regulator
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Input Power
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220 Volts A.C. Supply, 50 Hz
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Digital Display
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LED/LCD Digital RPM Indicator and Digital Timer
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Timer Range
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0 to 99 minutes (Digital support)
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Power Consumption
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100 Watts (W)
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Paddle Dimensions (Approx.)
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1" x 3"
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Stirring Rod Length (Approx.)
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10 inches
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Paddle Height Adjustment
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Adjustable height via lighting knob/mechanism
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Beaker Capacity Supported
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1 Litre (1000 ml) up to 2 Litres
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Jars Spacing (Approx.)
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6 inches in between rods
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Key Features
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Built-in diffused cold light/illumination for sample viewing
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Accuracy
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Varies, typically +/- 2 RPM for digital models
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Application
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Water Treatment, Flocculation, Coagulation Testing
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