Tyler screens

Three parts water to one part silicate powder by wt. Tyler screen. 

Tyler Standard Sieve Series Many users case their tests on Tyler standard testing sieves (Table 19-6). The only difference between the U.S. sieves and the Tyler screen scale sieves is the identification method. Tyler screen scale sieves are identified by nominal meshes per linear inch while the U.S. sieves are identified by millimeters or micrometers or by an arbitraiy number which does not necessarily mean the mesh count. The Tyler standard sieve scale series has... 

Note This table combines information given in l)Lange s Handbook of Chemistry 2)Chemical Rubber Co s Handbook of Chemistry and Physics and 3)R- D. Cadle s "Particle Size Determination, 1 Interscience, NY 1955). The IMM (Institution of Mining and Metallurgy, London) Series, given in Ref 3, has been largely replaced by the BSI Series, and is not included in this table. The Tyler screens are manufd by the W. S. Tyler Co, Cleveland, Ohio. The French use... 

It has become the practice to refer to chromatographic supports in terms of the mesh range. When sieving particles for chromatographic columns both the Tyler Standard Screens and the United States Standard Series are frequently used. Tyler screens are identified by the actual number of meshes per linear inch. 

Equivalent standard Tyler screen mesh Theoretical screen mesh moomoocMN >wo s... 

U. S. Sieve Series—A series of sieves, differing but slightly from the Tyler Standard Screen Scale, was proposed in 1919 by the National Bureau of Standards. This has been called the U. S. Sieve Series and in general the sizes advance in the same ratio as the Tyler Screen Scale, but a 1-mm opening is used as a base rather than the opening for the 200-mesh cloth in the Tyler series. There appears to be no reason for preferring one type of series over the other. Table 12 shows the various characteristics of the U. S. Sieve Series adopted by the A.S.T.M. which may be contrasted, with those of the Tyler Screen Series given in Table 11. 

Influence of Particle-Shape and Moisture on Porosity—Graton and Fraser (1935) examined the influence of particle-shape on porosity under dry and wet conditions. All samples studied by these investigators passed an 18- and were retained on 35-mesh Tyler screens. Their results for several materials are shown in Table 29. The loose state was the arrangement assumed by the particles when poured into the test container. The compact state was achieved by tapping the test container. In the wet state the material was first wetted and poured into the measuring container filled with water. After the desired packing was obtained, the material was dried at 110 deg C, collected, then weighed and its volume determined. It is to be noted in Table 29 that wet materials pack more loosely than dry materials. 

Rubber. Hycar 1442 X 110 manufactured by B. F. Goodrich Co. was used. Properties reported by the company include specific gravity 1.0 to 3.0, tensile strength 3000-4000 psi, and a maximum service temperature of 250°-300°F. The rubber came as a powder and was sifted in Tyler screens only the largest (20-40 mesh) particles were blended with the styrene/acrylonitrile. 

The coal was crushed and sieved on Tyler screens to -8 +16 mesh (1-2.4 mm). Approximately 10 g of coal was placed in an alumina boat and pyrolysed under argon in a tube furnace for 20 hours at constant temperature in the ranges 410-645°C. 

Size and condition of the urea. This was previously mentioned but is re-emphasized because of its extreme importance. The substrate material graphed in Figure 5 was spherical, smooth, and closely sized. Its Tyler screen size is +6 mesh = 0%, —6 +7 mesh = 9%, —7 +8 mesh = 70%, —8 +9 mesh = 19%, —9 mesh = 2%. 

Sieve Designation Sieve Opening Nominal Wire Diameter Tyler Screen... 

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