SV Technocrats India’s Gyratory Sieve Shaker is a mechanical device used for particle size analysis of aggregates, sand, cement, soil, and other granular materials. It operates by providing a gyratory (circular and tilting) motion to stacked test sieves, ensuring efficient material separation. It is commonly used in laboratories for sieve analysis, conforming to standards like IS: 2720 (Part 4), ASTM E11, and BS 410.
Components of a Gyratory Sieve Shaker
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Sieve Stack Holder – Supports multiple test sieves.
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Motorized Drive System – Provides uniform gyratory motion.
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Eccentric Mechanism – Converts rotary motion into circular tilting movement.
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Timer Control – Allows precise setting of test duration.
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Base Frame – Ensures stability during operation.
Operating Principle
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The machine imparts a horizontal circular motion combined with a slight vertical tap.
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Material placed in the top sieve is separated based on particle size, with finer particles passing through lower sieves.
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The collected fractions in different sieves help in grading analysis of materials.
Testing Procedure Using Gyratory Sieve Shaker
1. Sieve Selection & Setup
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Choose sieves of appropriate mesh sizes based on the material.
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Stack sieves in descending order of mesh size (largest mesh on top, smallest at the bottom).
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Secure the sieve stack in the shaker.
2. Sample Preparation
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Weigh a representative sample (e.g., 1kg of sand or aggregates).
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Pour it into the top sieve.
3. Sieve Shaking Process
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Set the timer (typically 5 to 10 minutes).
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Start the machine; it will perform a gyratory and tilting motion.
4. Analysis & Calculation
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After completion, weigh the material retained on each sieve.
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Calculate percentage retained, percentage passing, and the particle size distribution curve.
Applications of Gyratory Sieve Shaker
✅ Aggregate & Sand Testing – Ensures
materials meet grading specifications for concrete and asphalt.
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Cement & Soil Analysis – Helps determine
fineness modulus and grain distribution.
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Powder & Granular Material Testing – Used in
food, pharmaceutical, and chemical industries.
