Mechanical Sieves
Mechanical Sieves
Mesh device used to strain solids from liquids and manually separate particles by size; sieves can be constructed of metal or plastic. Products include sets, macro and micro sieve sizes, sifters and beads, etc.
What Is a Sieve?
Sieves are mesh strainers. They are typically round, with solid metal walls connected to a woven metal screen. They are often used with sieve receivers that collect the material that falls through the sieve. To prevent loss and contamination of the material, it can be protected by a sieve cover. Sieve covers are also necessary for covering the top sieve when multiple sieves are stacked on a laboratory shaker.
What Is Sieving?
Sieving is a technique for separating a sample into particles of different sizes. Sieving can be used to separate stones from sand and is used in the food industry to help eliminate contamination by foreign bodies.
Analysis by sieving may require a single sieve or a set of mesh sieves, arranged by decreasing size of the mesh openings. Air flow, liquid, vibration, or another mechanical method is used to move the sample particles through the screens.
Critical variables include sample size, agitation parameters, duration, and end point determination. Sample properties, like hygroscopic or electrostatic tendencies, can present analytical challenges, and some samples may need to be suspended in a liquid for accurate measurement.
Types of Sieves
Sieve frames and meshes may be stainless steel or brass. Common diameters are 3, 8, and 12 in. and 200 and 300mm; non-standard sieves may have other diameters, including 6, 10, and 18 in. Heights range from 1 to 9 in. and may be designated as full, intermediate, or half-height.
ASTM E-11 establishes criteria and tolerances for the openings in the woven wire mesh for standard sieve sizes. Some sieves are also traceable to NIST or must meet ISO 3310-1.
Fisherbrand™ Stainless Steel Test Sieves, 200 Dia. x 50 mm H, Pore sizes in Micrometers, ISO 3310/1
Use for separation, fractioning, or particle size determination. These Stainless Steel test sieves have an internal height of 50 mm and diameter of 200 mm. Available in a wide range of pore sizes smaller than 1mm.
Fisherbrand™ Stainless Steel Lids For Test Sieve
Providing a secure closure to Fisherbrand™ Stainless Steel Test Sieves.
Fisherbrand™ U.S. Standard Stainless Steel Sieves, 8 in. dia. x 2 in.D
Stainless Steel. Aperture sizes from 5.00 in. opening to 500 mesh.
Bel-Art™ SP Scienceware™ Additional Mesh Inserts
For use with Mini-Sieve™ micro sieve set.
Fisherbrand™ Stainless Steel Receiver For Test Sieves
For the collection of materials processed through Fisherbrand™ Stainless Steel Test Sieves.
Fisherbrand™ Stainless Steel Test Sieve with Woven Wire Mesh
Made from Stainless Steel and available in a wide variesty of sizes. Fisherbrand™ Stainless Steel Test Sieve with Woven Wire Mesh has a 200mm diameter.
RETSCH Test Sieves - 14 Mesh or Greater
Stainless steel with wire gauze
Fisherbrand™ Stainless Steel Test Sieve with Woven Wire Mesh
Made from stainless steel and available in a wide variesty of sizes. Fisherbrand™ Stainless Steel Test Sieve with Woven Wire Mesh has an 100 mm diameter.
De Buyer™ Stainless Steel Flour Sieve No. 20
A professional sieve entirely made of Stainless Steel, ideal for finely sieving flour before adding it to a mixture to avoid the formation of lumps.
Linker Industrietechnik™ Stainless Steel Test Sieve with PVC Welding, 200 Dia. x 50 mm Height
Sifts particles in a wide range of pore sizes. These stainless-steel test sieves have PVC welding and an internal height of 50 mm and diameter of 200 mm.
