Filter discs are essential components used in various filtration processes to separate solids from liquids or gases. They are commonly made from materials like cellulose, glass fiber, PTFE, nylon, or polyethersulfone (PES), depending on the application.

Common Types of Filter Discs:
1. Membrane Filter Discs
Used in laboratory and industrial filtration.
Materials: PTFE, nylon, PES, PVDF.
Pore sizes range from 0.1 µm to 10 µm.

2. Glass Fiber Filter Discs
High retention efficiency for fine particles.
Used in air monitoring, HPLC, and particulate analysis.

3. Cellulose Filter Discs
Economical, generalpurpose filtration.
Used in qualitative and quantitative analysis.

4. Sintered Metal/Stainless Steel Filter Discs
Durable, reusable, and resistant to high temperatures.
Used in aggressive chemical filtration and highpressure applications.

5. Ceramic Filter Discs
Chemically inert, used in corrosive environments.

Applications of Filter Discs:
Laboratory Use: Sample preparation, sterilization, HPLC.
Industrial Use: Water treatment, pharmaceuticals, food & beverage, oil & gas.
Air Filtration: HVAC systems, cleanrooms, emissions testing.

Selection Criteria:
Pore Size (µm) – Determines particle retention.
Material Compatibility – Chemical and temperature resistance.
Flow Rate – Faster flow may require larger pores or optimized materials.