33mm PES Hydrophilic Filters for Medical or Lab Use with Luer Connectors

5 Micron Injection Disc Filter with standard Luer Lock Connections

This Medical-grade filter device consists of a 33mm diameter housing and high-quality hydrophilic PES membranes with sterilization grade pore size of 0.22µm.

The PES Hydrophilic Filter is a versatile consumable for life science, biotech labs and healthcare settings. Its design balances sterility (0.22 µm), efficiency (high flow rate via hydrophilicity), and sample preservation ((low protein adsorption)—making it the preferred choice for critical applications where contaminants, sterility, or protein recovery are top priorities.

Specifications

Recommended Applications

1. Microparticulate Filtration

Removes unintended tiny particles (e.g., dust, glass shards, cellular debris, aggregated proteins) from liquids. The 0.22 µm pore size ensures consistent removal of particles down to the minimum required for sterility or clarity. Useful for preparing reagents, buffers, or media free of contaminants that could interfere with experiments or damage equipment.

2. Buffer Filtration

Buffers are foundational in assays, electrophoresis, and protein studies. The hydrophilic surface ensures fast flow rates (critical for high-throughput labs) and minimal loss of buffer components via adsorption. Sterile filtration (0.22 µm) also eliminates microbial contaminants that could degrade the buffer over time.

3. Protein Filtration

Proteins are highly sensitive to adsorption onto surfaces, which leads to reduced yield and purity. The hydrophilic PES membrane’s low protein-binding property preserves protein integrity and function—essential for downstream applications like mass spectrometry, crystallography, or therapeutic production. The 0.22 µm pore size also removes bacterial contaminants from protein solutions without altering the protein itself.

4. Medium Filtration

Cell culture media (e.g., DMEM, RPMI) must be sterile to prevent microbial growth that could kill or contaminate cell lines. The 0.22 µm pore size provides reliable sterilization, while the hydrophilic surface enables rapid filtration of viscous media (reducing processing time and shear stress on sensitive nutrients). Low protein adsorption also prevents loss of serum proteins (e.g., fetal bovine serum) added to the media.

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Founded in 1994, Zhejiang XINNA Medical Device Technology Co.,ltd is a trusted and professional manufacturer of high-quality membrane filtration products. As a high-tech enterprise integrating R&D, production and sales,  Xinna provides a wide range of membrane filter products and solutions in the process of filtration, sterilization and purification. ln terms of core technology, it owns 7 patented technologies of joint research and development of filter membranes with one of the best Universities in China. The Nylon, PES, PP, PVDF, PTFE and other membrane filters from us are widely used in medical devices,laboratory, healthcare, air filtration and more fields.

Facilities

Our 161,458 square feet facilities are located in Zhejiang Province of China, with 75,347 square feet as Class 100,000 Cleanroom. This allows us to provide a superior level of cleanliness and contaminate-free status of products to our customers including medical device manufacturers, laboratories and healthcare professionals all around the world.

Featured Products

1. Inline IV Filters & extension lines with IV filters & Transducer protectors

• PTFE membrane for air evacuation
• Single or double-layer PES membrane as filter media
• Pore size: 0.22μm, 0.45μm,1.2μm, 2μm, 3μm, 5μm

Certificates

We hold the ISO 9001:2009 and ISO 13485:2003 Certificates, committed to maintaining a high standard of quality and safety in our operation to ensure our products and services meet our customers’ needs.