Digital Jar Test Apparatus (Flocculator), 6 Stirrers, MS Body, SS Spindles – DVI
The DVI Digital Jar Test Apparatus (also known as a Flocculator or Multiple Spindle Stirrer) is an advanced laboratory instrument designed specifically for conducting crucial flocculation, coagulation, and sedimentation experiments in water and wastewater treatment facilities. This model is configured to efficiently and economically test up to six water samples simultaneously. It mimics the full-scale operation conditions of water treatment plants, helping operators determine the optimum dosage of coagulants, such as alum, required for effective treatment.
The unit ensures identical test conditions for all six samples, which is vital for obtaining comparative and accurate results for chemical dosing calculations.
Key Features
• Robust Construction: The apparatus features a durable Mild Steel (MS) body with a protective powder-coated finish.
• High-Quality Stirrers: It is equipped with six Stainless Steel (SS) stirring spindles/paddles that are rust-proof and highly resistant to chemical and mechanical corrosion.
• Adjustable Height: The stirring shafts have adjustable spacers or knobs, allowing the user to precisely adjust the depth of the stirring paddles within the beakers as required for the experiment.
• Precise Digital Control: Features an electronically controlled variable speed motor (often a DC motor or stepper motor) ensuring stable, continuous adjustment and low noise during operation.
• Illuminated Base: The base of the unit is fitted with built-in illumination (such as white LED light) below a translucent plate, which provides diffused cold light. This feature allows for clear observation of floc formation and sedimentation size settling at the bottom of the beakers.
• Programmable Operation: Includes a digital timer and typically features two pre-set programs, allowing routine speed and time parameters to be stored, recalled, or modified instantly with the push of a button.
• Ease of Use: Stirring heads can be easily lifted for placing and removing beakers. The unit typically incorporates a flat, touch-sensitive keypad for easy control and cleaning.
Principle of Operation
The Digital Flocculator operates on the principle of top stirring via spindles rotating at a controlled, low RPM speed. Water treatment involves adding chemical agents (coagulants) to a water sample to encourage suspended particles to clump together (coagulation and flocculation).
The apparatus is critical for performing the Jar Test Experiment, which measures the effectiveness of coagulants and flocculation under varying pH and chemical quantities. Accurate Jar Test Calculation relies on testing samples at low speeds (typically 4 RPM to 16 RPM for effective coagulation), where the precise speed, duration, and mixing intensity are digitally regulated to simulate real-world plant conditions.
Typical Applications
This instrument is essential for research and testing across multiple sectors focused on water quality and treatment:
• Water Treatment Plants
• Effluent Treatment Plants (ETP)
• Sewage Treatment Plants (STP)
• R&D laboratories (Research and development)
• Water Research Industry
• Industrial Complexes, Hotels, and Housing Societies
• Pharmaceutical and Chemical Industries (where fluid mixing and flocculation studies are required)
Technical Specifications
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Feature
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Specification (6 Stirrer Model)
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Model Type
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Jar Test Apparatus (Flocculator)
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Brand
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DVI
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Stirring Capacity
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6 Jars / 6 Stirring Positions
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Jar Capacity (Recommended)
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1 Liter (1000 ml) or 1 to 2 Liters
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Body Material
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Mild Steel (MS) Powder Coated Finish
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Stirring Paddle/Spindle Material
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Stainless Steel (SS)
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Motor Type
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DC Motor or Stepper Motor
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Speed Range (Variable)
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Typically 2 to 250 RPM (or 10 to 300 RPM depending on configuration)
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Speed Control
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Digital Speed Regulator/Knob
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Speed Accuracy
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+/- 2 RPM (or +/- 1 RPM depending on configuration)
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Display Type
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LED/Digital RPM Indicator
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Timer
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Digital Timer, 0 to 99 minutes
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Pre-set Programs
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2
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Controls
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Keypad (Touch-sensitive)
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Illumination
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Built-in diffused cold light (White LED/Fluorescent tube)
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Power Supply
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220 V AC / 230 V AC, 50 Hz, Single Phase
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Power Consumption
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Typically 100 W to 200 W
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Warranty
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1 Year (Standard)
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