Stainless Steel Test Sieve For Pharmaceutical Powder

Saturday March-07 2026  16:01:29

Stainless Steel Test Sieve For Pharmaceutical Powder can be used to detect the particle size of pharmaceutical powders and separate powders of different coarseness. Made of stainless steel, it maintains the original state of the powder during use, reducing contamination and preventing impact on efficacy. It can sieve particle sizes from 75 microns to 2000 microns, with sieve #1 corresponding to 2000 microns and sieve #9 to 75 microns, meeting the needs of routine testing and grading.

The Stainless Steel Test Sieve for Pharmaceutical Powder is generally made of a single piece of 304 or 316L stainless steel, with the sieve frame and mesh fabric made of the same material. Stainless steel is less likely to react with pharmaceutical powders, is easy to clean, and can withstand the corrosion of cleaning agents. It conforms to ISO 3310-1 or ASTM E11 international standards, which specify the tolerance range for the sieve aperture, ensuring stable data obtained from its testing.

Why is sieving crucial in pharmaceutical powder processing?

Pharmaceutical powders vary greatly in morphology, some with coarse particles, others with very fine ones, and they tend to clump together, making processing challenging. Stainless Steel Test Sieve for Pharmaceutical Powder helps stabilize pharmaceutical powders.

Pharmaceutical powders contain therapeutic ingredients as well as excipients such as lactose, microcrystalline cellulose, and magnesium stearate. If the particle size varies too much and the distribution is uneven, the tablet dissolution rate will be unstable, affecting efficacy and potentially causing safety issues. After sieving, the excipients mix more evenly with the raw materials, reducing the likelihood of uneven content during tableting and resulting in more consistent finished product quality.

Sieving also helps remove impurities, excessively large particles, and clumps introduced during production. Quality control uses test sieves to inspect each batch, removing out-of-size particles and potential foreign matter, better meeting pharmaceutical quality requirements.

Stainless Steel Test Sieve for Pharmaceutical Powder Particle Size Parameter Table

Mesh	Aperture (μm)	Aperture (mm)	Typical Use
20 mesh	841 μm	0.841 mm	Coarse particle sieving
30 mesh	595 μm	0.595 mm	Raw material rough screening
40 mesh	400 μm	0.400 mm	Coarse powder
50 mesh	297 μm	0.297 mm	Pharmaceutical powder fine screening
60 mesh	250 μm	0.250 mm	Medium particles
80 mesh	177 μm	0.177 mm	Medium-fine powder
100 mesh	149 μm	0.149 mm	Common pharmaceutical powder sieve
120 mesh	125 μm	0.125 mm	Fine powder
140 mesh	105 μm	0.105 mm	Medium-fine powder for pharmaceuticals
170 mesh	88 μm	0.088 mm	Very fine powder
200 mesh	74 μm	0.074 mm	Commonly used in pharmacopoeia
230 mesh	63 μm	0.063 mm	Fine powder
270 mesh	53 μm	0.053 mm	High-precision sieve
325 mesh	44 μm	0.044 mm	Ultrafine powder
400 mesh	37 μm	0.037 mm	Extra-fine powder

How to Choose the Right Stainless Steel Test Sieve for Pharmaceutical Powder?

When selecting a Stainless Steel Test Sieve for Pharmaceutical Powder, consider the following factors for comparison:

First, consider the sieve aperture. The mesh size must match the particle size requirements of your powder. For coarse to medium-fine powders, sieves with apertures of 150 to 2000 microns are generally used for grading. For fine powders after micronization, sieves with apertures of 45 microns (325 mesh) are often used, and some even use smaller apertures like 25 microns (500 mesh).

Next, consider the sieve diameter and height. Pharmaceutical manufacturers commonly use 200 mm and 300 mm sieves. Standard height sieves are suitable for routine particle size analysis, while semi-high sieves can be stacked for multi-stage particle size distribution testing with a vibrating sieve machine.

The structure and surface finish are also important. The sieve should be made of stainless steel with a welded or one-piece design to minimize powder accumulation in gaps. When used in a cleanroom, pay attention to the polishing level of the sieve frame surface to reduce the possibility of bacterial adhesion.

If the powder is very fine and easily sticks to the mesh, consider whether the sieve can be paired with an ultrasonic device. This device transmits high-frequency energy to the sieve, keeping the mesh open and allowing the powder to pass through smoothly.

Applications in the Pharmaceutical Industry

Stainless Steel Test Sieve For Pharmaceutical Powder is used in various stages of drug research and development and production:

Sterile APIs and Filtration: Handling sterile APIs requires controlled operating conditions. Drug powder particle sizes range from 1 to 1000 micrometers; sieving helps control the accuracy of the drug delivery system during production. In a sterile environment, the sieve structure is adapted for isolator operation.

Sieving of Pharmaceutical Excipients: Some excipients are prone to moisture absorption or static electricity problems during operation. Materials such as starch and maltitol are tested using test sieves to determine particle size distribution to confirm whether their flowability and compressibility meet pharmacopoeia standards.

Research and Development Phase: In the research and development stage, analytical-grade test sieves are used to collect basic data on the particle size distribution of new drugs, providing a reference for subsequent scale-up production and process adjustments.

Stainless steel test sieves for pharmaceutical powders, as a sophisticated tool for sieving medical powders, not only ensure the accuracy of sieving results but also make the sieving results reliable and referable.