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.
Fritsch Milling And Sizing Inc Clamping Lid 100 mm with 1 Nozzle
With 1 nozzles for wet sieving with test sieves 100 mm dia.
The wet clamping lid features 1 nozzle which sprays the entire interior chamber, thus helping to flush the material through the sieve apertures.
Especially recommended for materials with a high electrostatic charge or very high content of fine material.
Gilson Company Inc 3in (76mm) diameter ASTM E11 Test Sieve, No. 230
3in (76mm) diameter ASTM E11 Test Sieve has stainless steel woven-wire cloth with No. 230 (63µm) openings and full height stainless steel frame. Overall height is 1-3/4in and stacked height is 1-1/8in. Features: Individually serial numbered, Compliant with ASTM E11 requirements for Compliance Sieves. Included Items: 3” Sieve, All Stainless, Full Height, No. 230, Certificate of Conformance to ASTM E11 requirements.
Pfaltz & Bauer Molecular Sieves| Type 5 A| 4-8 Mesh Beads 500G
Molecular Sieves| Type 5 A| 4-8 Mesh Beads 500G
Med Vet International Jorvet Laser Large Spot Tip, 1.4mm, for CO2 Laser System, J0941X
For use with the AccuVet LX-20 CO2 Laser System. JorVet offers these commonly needed parts for the operation of the CO2 Laser. These parts are warranted to be identical in quality to any factory part. All laser tips are compatible with Luxar LXH-ST, LXH-TL, LXHA105, and LX-AH Handpieces. Non-sterile.
Chemglass Life Sciences Cell Screen, 500 Mesh, SST
Cell Screen, 500 Mesh, Stainless Steel . Component of the CLS-5020 Stainless Steel tissue grinder cel dissociation sieves. Pictured are the complete tissue grinders, but this item is cell screen only. 500 mesh is equivalent to 25 micron and 0.0010 inches.
Dual Manufacturing Company Inc SS MESH SIEVE 12IN D 2IN DEEP
NC3640584 SS MESH SIEVE 12IN D 2IN DEEP
Cole-Parmer 3"-Diameter Sieve, Full Height Stainless Steel, No. 40 (425µ)
Made of stainless steel; 3" diameter, full height sieve, 1" stacking height.
Fritsch Milling And Sizing Inc Sieve Ring P-14 Premium Line 1.0 mm Trapezoidal Perf.
Sieve ring 1 mm trapezoidal perforation with reinforced edges made of stainless steel
Sieve rings determine the final fineness of the sample.
Sieve rings with reinforced edges and trapezoidal perforation are perfect for fast comminution of medium-hard to soft materials, the trapezoidal perforation provides additional shearing effects.
Additionally are sieve rings with reinforced edges with round perforation available which are perfect for brittle materials and medium fineness with narrow particle size range.
Sieve rings are also available in further perforations.