Pall 4402 Vent Filter Vacushield 0.2 um Pore 50 mm Disc with Hose Barb - 3 Filters

Pall 4402 Vacushield Vent Filter – 0.2 µm PTFE, 50 mm Disc (Hose Barb)

The Pall 4402 Vacushield is a high-performance hydrophobic vent filter engineered to protect vacuum pumps, house vacuum lines, and sensitive laboratory equipment from liquid contamination and aerosolized microorganisms. Featuring a 0.2 µm PTFE (polytetrafluoroethylene) membrane, this filter acts as a reliable barrier that allows air and gases to pass freely while effectively blocking aqueous liquids and moisture. Housed in a durable, chemically resistant polypropylene casing, the Vacushield is designed to withstand the rigors of laboratory suction and filtration workflows. Its universal hose barb connections ensure a secure, leak-proof fit with standard 1/4" to 1/2" (6.4 to 12.7 mm) ID vacuum tubing, making it an essential safety component for any filtration or aspiration system.

Technical Performance and Design

• Hydrophobic PTFE Membrane: The 0.2 µm pore size PTFE membrane is inherently water-repellent, providing a robust sterile barrier that prevents the passage of bacteria (99.99% efficiency) and liquid slugs that could damage expensive vacuum machinery.

• Vacuum Pump Protection: Designed to be placed in-line between the collection vessel and the vacuum source, it prevents fluid carryover and aerosolized particulates from entering and corroding pump internals.

• Large 50 mm Filtration Area: The 19.6 cm² effective filtration area ensures high airflow rates even at low differential pressures, preventing bottlenecks in your filtration or aspiration speed.

• Universal Hose Barb Connectors: Features stepped hose barbs that accommodate a variety of tubing sizes, ensuring a tight friction seal without the need for specialized adapters.

Product Specifications

• Catalog Number: 4402

• Pore Size: 0.2 µm

• Membrane Material: Hydrophobic PTFE

• Housing Material: Polypropylene

• Diameter: 50 mm

• Connections: Stepped Hose Barbs (fits 6.4 – 12.7 mm / 1/4" – 1/2" ID tubing)

• Sterility: Non-Sterile (Standard Grade)

• Max Operating Pressure: 1.0 bar (15 psi)

Key Benefits & Applications

• Suction & Aspiration Systems: Critical for cell culture media aspiration, preventing biohazardous aerosols from contaminating house vacuum lines or exhausting into the lab environment.

• Sterile Venting: Ideal for venting small fermentation tanks, carboys, and bioreactors to allow gas exchange while maintaining a sterile internal environment.

• Maintenance Reduction: By stopping moisture and particulates at the source, the Vacushield significantly extends the service intervals of oil-sealed and dry diaphragm vacuum pumps.

• Chemical Compatibility: The PTFE and polypropylene construction offers broad resistance to common laboratory solvents and acidic/basic vapors often found in chemical filtration.

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