Standards Pharmacopoeia Sieve

What is Standards Pharmacopoeia Sieve?

Standards pharmacopoeia sieve refers to the sieves used in the preparation process in accordance with the provisions of the Chinese Pharmacopoeia and the national unified specification, mainly used in the classification and screening process of traditional Chinese medicine and western medicine granules. Standards pharmacopoeia sieve can be hand sieved, and can also be used in conjunction with a test sieve to improve efficiency.

What are the Standards Pharmacopoeia Sieve?

The standards pharmacopoeia sieve stipulated in the "Chinese Pharmacopoeia" are No. 1-9 (10 mesh-200 mesh), No. 1 sieve with large mesh, No. 2, No. 3, No. 4, No. 5, No. 6, No. 7, No. 8 , and the number 9 decreases in turn. The mesh numbers are: 10 mesh, 24 mesh, 50 mesh, 65 mesh, 80 mesh, 100 mesh, 120 mesh, 150 mesh, 200 mesh.

Sieve Number	Aperture(μm)	Tolerance range (μm)	Mesh
S-1	2000	±70	10 mesh
S-2	850	±29	24 mesh
S-3	355	±13	50 mesh
S-4	250	±9.9	65 mesh
S-5	180	±7.6	80 mesh
S-6	150	±6.6	100 mesh
S-7	125	±5.8	120 mesh
S-8	90	±4.6	150 mesh
S-9	75	±4.1	200 mesh

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Application of Standards Pharmacopoeia Sieve

Standards pharmacopoeia sieve is used for classification, sieving, filtration and impurity removal of liquid, powder and granular drugs by traditional Chinese medicine, western medicine, preparation manufacturers or pharmacopoeia units.

Pharmaceutical Powder Properties	Pass All	Mixed Pass
coarser powder	No. 1 sieve (10 mesh)	No. 3 (50 mesh) sieve not exceeding 20%
coarse powder	No. 2 sieve (24 mesh)	No. 4 sieve (65 mesh) no more than 40% powder
medium powder	No. 4 sieve (65 mesh)	No. 5 sieve (80 mesh no more than 60% powder
fine powder	No. 5 sieve (80 mesh)	No less than 95% powder with No. 6 sieve (100 mesh)
finer powder	No. 6 sieve (100 mesh)	No. 7 sieve (120 mesh) no less than 95% powder
very fine powder	No. 8 sieve (150 mesh)	No. 9 sieve (200 mesh) no less than 95% powder

Mesh Types for Standards Pharmacopoeia Sieve

1. Metal wire woven mesh: a widely used type of screen mesh, usually customers buy this type of mesh because its cost is relatively low, the price is relatively low, and the flexibility is relatively good, but the accuracy is somewhat low, and the mesh size is relatively low. There is the possibility of deformation. Usually, the accuracy of the mesh is controlled by reaming and shrinking. It is mostly used in the diamond industry. more than 90 percent.

2. Metal punching plate mesh: The metal punching plate screen of the Pharmacopoeia screen is a screen that uses a punch to punch out the target pattern in the plate to be processed. There are also many kinds of materials, such as stainless steel, copper plate, aluminum plate. Compared with the ordinary woven screen, the screen of the punching plate is not easy to deform, wear-resistant, and has a relatively uniform precision. It is suitable for materials with high density, large impact on the screen surface and irregular shapes.

3. Electroforming mesh: It is usually manufactured by electrochemical method, and its accuracy is higher than the other two. In theory, its accuracy can reach 1 micron, the screen hole will not be deformed, the cleaning and maintenance time is relatively short, and the service life is relatively short. It is relatively long and has a better application in laboratories with high precision requirements.

Benefits of Standards Pharmacopoeia Sieve

1. A set of standards pharmacopoeia sieve consists of 9 sieves with different meshes, 1 non-perforated sieve, and 1 sieve cover (that is, the bottom and cover that are often referred to).

2. The screen frame is made of SUS304 (0Cr18ni9) stainless steel by stretching and polishing, the wall thickness is 0.6-0.7 mm, the surface light is recognizable, the overall shape is sturdy and durable, without magnetism, the screen mesh and the screen frame are fixed by tin welding, and will not loosen. It can withstand high temperature below 300 degrees.

3. The sieve mesh is a stainless steel woven mesh, the meshes conform to the GB6003.1-1997 standard, and are used after passing the inspection of tool microscopes, projectors and other equipment, which can ensure that the same type of standards pharmacopoeia sieve produced at any time has consistency and mutuality. 

Mesh to Micron Conversion Chart

Mesh number (mesh)	Aperture	Mesh number (mesh)	Aperture	Mesh number (mesh)	Aperture	Mesh number (mesh)	Aperture
5	4mm	40	0.45mm	180	88μm	325	34μm
6	3.2mm	50	0.355mm	190	80μm	360	40μm
8	2.5mm	60	0.3mm	200	76μm	400	38.5μm
10	2mm	70	0.25mm	220	70μm	500	30.8μm
12	1.6mm	80	0.2mm	240	65μm	600	25μm
14	1.43mm	100	0.15mm	250	63μm	800	15μm
16	1.25mm	120	0.125mm	260	57μm	900	10μm
18	1mm	140	0.105mm	280	55μm	1000	8μm
20	0.9mm	150	0.1mm	300	50μm	1200	5μm
30	0.6mm	160	97μm	320	48μm	Bottom cover	Nonporous

Proof of Solutions for Our Wide Range of Products

steps of Using Standards Pharmacopoeia Sieve

1. Stack the sieves of the standards pharmacopoeia sieve according to the aperture (mesh) from large to small, and stack them on the tray seat from top to bottom, and position the standard sieve by grooves or positioning screws.

2. Put the material to be inspected into the screen grid at the upper end, (or cover the upper cover), then press the screen grid with the screening head set on the wire column, and tighten the nut on the wire column to compress the screen grid. (Note: Both sides should be the same force, and then use the locking screw to lock.

3. Put the timer switch at the corresponding required position, (pay attention to reading the product manual, the set time is different for different settings), then turn on the power switch, and the inspection sieve starts to work.

4. After the work of the standards pharmacopoeia sieve stops, unscrew the nut on the thread column and carefully remove the sieve grid.

5. Cut off the power.