More Details

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

  1. Sieve Stack Holder – Supports multiple test sieves.

  2. Motorized Drive System – Provides uniform gyratory motion.

  3. Eccentric Mechanism – Converts rotary motion into circular tilting movement.

  4. Timer Control – Allows precise setting of test duration.

  5. Base Frame – Ensures stability during operation.

Operating Principle

  • The machine imparts a horizontal circular motion combined with a slight vertical tap.

  • Material placed in the top sieve is separated based on particle size, with finer particles passing through lower sieves.

  • The collected fractions in different sieves help in grading analysis of materials.

Testing Procedure Using Gyratory Sieve Shaker

1. Sieve Selection & Setup

  • Choose sieves of appropriate mesh sizes based on the material.

  • Stack sieves in descending order of mesh size (largest mesh on top, smallest at the bottom).

  • Secure the sieve stack in the shaker.

2. Sample Preparation

  • Weigh a representative sample (e.g., 1kg of sand or aggregates).

  • Pour it into the top sieve.

3. Sieve Shaking Process

  • Set the timer (typically 5 to 10 minutes).

  • Start the machine; it will perform a gyratory and tilting motion.

4. Analysis & Calculation

  • After completion, weigh the material retained on each sieve.

  • 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.
✅ Cement & Soil Analysis – Helps determine fineness modulus and grain distribution.
✅ Powder & Granular Material Testing – Used in food, pharmaceutical, and chemical industries.