Test Sieves

Laboratory Brass & SS Test Sieves

Test sieves are particle size analyzing instruments based on size. Test sieves are used in the laboratory along with sieve shakers. Test sieves are organized in the sieve stacks in laboratories. From ancient times, the hand-sieve technique has been popular to separate particles according to size. Test sieves are the advanced structure of hand sieves.

 

Definition of the test-sieves:

A test sieve is a screening instrument utilized in chemical or medical laboratories along with a sieve cloth tightly mounted at the top with the help of a rigid frame. With this instrument, we can separate particles of a material according to size and achieve the particle-size distribution curve.

Test sieves with different mesh openings are stacked on each other to get the particles separated based on their sizes.

 

Utilization of the test sieves:

Particle size distribution curve development:

In food, medicines, or pharmaceutical industries, test sieves are utilized in particle analyses. All these test sieves are equipped with progressive small openings and small fractions are separated. With the test sieves particles are differentiated based on their varying sizes and we can achieve the particle size distribution curve accurately.

 

Sieve shaker based utilization:

To get the best result sometimes test sieves are utilized with a sieve shaker. This shaker creates a particular range of vibration or oscillation. As a result, different-sized particles are differentiated accordingly and yield a great particle distribution curve.

 

Mesh size-based particle differentiation:

Test sieves are designed with different mesh sizes to separate different-sized particles or only a particular-sized one. For example, 100-mesh sieves are of 100 openings within an inch of space. Based on the materials mesh sizes are changed. During differentiating fine power small-pored mesh is used but for coarse materials large-pored meshes are required.

 

Classification of test sieves:

To perform the test-sieve analysis mainly two types of test sieves are utilized in laboratories. These are dry test sieves and wet wash test sieves.

 

Dry test sieves:

In laboratories, a dry test sieve is used where the material is free-flowing in nature. To pass the particles through the test sieves only a shake or motion is externally applied here.

 

Wet wash test sieves:

The wet wash test tube is used when the material is hard or solid. In this case, water is added and it becomes liquid and passes through the test sieve. It is very popular in the aggregate industry where clay, salts, or rock particles are differentiated with the help of wet wash test sieves.

 

Parts of test sieves:

Wire mesh Screen:

The wire mesh screen or the sieve cloth is the most crucial part of test sieves. It's made of stainless steel with pores having diameters of 4 to 635 mesh units.

 

Frame:

It's a circular piece made of stainless steel or brass which carries the mesh screen. Its size varies from 3 to 12 inches or internationally 100 to 200 mm.

 

Skirt:

The skirt has the main function to maintain the balance in the test sieve and help it from being overwhelmed.

 

The price of a test sieve varies from 6375 rs to 79k.

 What standards are set in the test sieve?

 During purchasing the test sieve, we should follow the below-mentioned industry standards.

 

• Mesh size
• Numbers of test sieves
• Number of samples needed
• Sieve shaker is required or not
• How much time test sieve is used
• Whether test sieves are certified or calibrated

 

Test sieves are highly utilized in the laboratories to get the finest materials and control the quality of yields. Particle size distribution curve is the main aim of utilizing test sieves. It helps in research, particle size analyses, and quality control. With all these results test sieves become crucial parts of laboratories across different industries including pharmaceutics, cosmetics, food preparation, etc.