PES Membrane Disc Filters, 0.45um, 293mm, Nonsterile, 25/Pk
GVS SKU: 1214760

Featuring a strong, microporous asymmetric polyethersulfone (PES) film cast from a high-temperature polymer, this 293mm membrane disc delivers reliable particulate removal during general filtration at a 0.45um pore size. The medium is naturally hydrophilic, so it wets out without added wetting agents that could interfere with downstream analyses, and its acid and base resistance supports use across a broad range of aqueous and chemically aggressive samples. With a nominal thickness of 110 to 150um and a plain surface, it provides consistent flow and handling in both manual and automated workflows.

Key PES Membrane Characteristics

• Naturally hydrophilic: wets out evenly without added wetting agents, eliminating extractables that can compromise test results.
• Low protein and drug binding: a uniform pore structure maximizes recovery of critical proteins and drugs.
• Low extractables: minimizes background interference for sensitive analytical and life science work.
• Acid and base resistant: the high-temperature PES polymer withstands aggressive chemistries and temperatures up to 135C.
• Strong and durable: the asymmetric microporous film resists tearing and offers superior burst strength under pressure.

Key Construction Characteristics

• Material: polyethersulfone (PES) depth-cast membrane with a plain surface.
• Format: 293mm diameter membrane disc for large-area filtration setups.
• Pore size: 0.45um for clarification and particulate removal.
• Sterility: supplied nonsterile.
• Pack: 25 discs per pack.

This membrane provides reliable, fast flow rates and high throughput while protecting sample integrity through low binding and low extractable performance. Its mechanical strength maintains membrane integrity during aggressive handling and high-pressure filtration. The result is consistent, reproducible clarification of aqueous and compatible solvent solutions.

Construction

Plain surface, asymmetric microporous film

Diameter

293mm

Extractables

Low

Material

Polyethersulfone (PES)

Maximum Operating Temperature (°C)

135

Membrane Brand

UltraSep

Membrane Color

White

Membrane Thickness (µm)

110-150

Mesh Format

Circle

Pack Count

25

Pore Size (µm)

0.45

Sterility

Nonsterile

Wettability

Hydrophilic

• Sample Clarification Removes particulates from aqueous and compatible solvent solutions during general filtration at a 0.45um pore size.
• HPLC and GC Sample Prep Clarifies samples prior to chromatographic analysis to protect columns and instrumentation.
• Protein and Enzyme Filtration Low protein and drug binding maximizes recovery of critical biomolecules during processing.
• Environmental Water Studies Low extractables make the membrane suitable for clarifying environmental water samples.
• General Particulate Removal The strong asymmetric PES film efficiently removes particulates under high-throughput conditions.
• Tissue Culture Media Filtration Naturally hydrophilic wetting supports clarification of biological fluids without added wetting agents.