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Acro® 50 Vent Filters, Pall Laboratory


4250 4251 4256 4003 4400 4258 4401
Reusable, in-line filters with 50mm hydrophobic PTFE membranes in polypropylene housing.

  • Reusable
  • Hydrophobic
  • Polypropylene housing

Large surface area provides greater throughput. Ideal for venting bioreactors, fermentation tanks, and carboys. Also for filtration of aggressive solvents and sterile gas purging of culture vessels. Stepped hose-barb connectors fit 6.4–12.7mm (1/41/2") I.D. tubing. Autoclavable at 121°C (250°F) for 30 minutes.

Ordering information: All are individually packaged, except for 28144-111, which comes in six bags of 12.



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Connector Pore Size Supplier No. Catalog Number Unit List Price Quantity
Stepped Hose Barb 0.2 µm 4251 28143-558 Each Retrieving
Pack of 18 Retrieving
Stepped Hose Barb 0.45 µm 4256 28143-616 Each Retrieving
Pack of 18 Retrieving
9.5 mm (3/8") Straight Pipe 0.2 µm 4401 28143-966 Each Retrieving
Pack of 18 Retrieving


7.3 cm (27/8")
Overall Length 8.2 cm (37/32")
Max. Ambient Temperature 130°C (266°F)
Effective Filtration Area 19.6 cm2
Max. Operating Pressure 4.1 bar (60 psi) at ambient temperature
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