For the safety of lab technicians, sensitive equipment and cell culture solutions, always use a vent filter. Pall offers self-contained, compact filter devices for high efficiency removal of airborne and particulate contamination under dry or moist conditions. Important considerations when selecting a gas or vent filter are air flow rate and particulate or microorganism retention. The membrane media in the filter must provide sufficient surface area or open space to accommodate the air flow required by the system. The filter should also efficiently retain particles and aerosol droplets. (Scroll down to view additional products.)

Product	Acro® 37 TF Vent Devices with PTFE Membrane	Bacterial Air Vents with Glass Laminate	Acro® 50 Vent Devices with Emflon® II Membrane	Acro® 50 Vent Devices with PTFE Membrane
Applications	Small-volume venting and degassing.	For venting and air/gas delivery. Exhibits higher temperature and pressure ratings, and higher air flow rates.	Ideal for use in air/gas and vent applications with proprietary, low pressure drop hydrophobic PVDF membrane.	Venting bioreactors, fermentation tanks, and carboys; sterile gas purging of culture vessels.
Materials of Construction Filter Media	PTFE on a polypropylene support	Hydrophobic glass laminate (polyester/glass fiber/polyester)	Hydrophobic polyvinylidene fluoride (PVDF)	PTFE on a polypropylene support
Housing	Polypropylene	Polypropylene	Polypropylene	Polypropylene
Pore Size	0.2 µm	1 µm (nominal)	0.2 µm	0.2 µm, 0.45 µm, 1 µm
Effective Filtration Area	7.5 cm2	7.5 cm2	20 cm2	19.6 cm2
Inlet/Outlet Connections	Stepped hose barbs, 6.4 - 9.5 mm (1/4 - 3/8 in.)	Stepped hose barbs, 6.4 - 9.5 mm (1/4 - 3/8 in.)	Stepped hose barbs, 6.4 - 12.7 mm (1/4 - 1/2 in.) diameter with slip luer ID in the hose barb	Stepped hose barbs, 6.4 - 12.7 mm (1/4 - 1/2 in.) diameter; 1/8 in. MNPT; 9.5 cm (3/8 in.) straight pipe
Max Operating Temperature	100° C (212° F) at 1 bar (100 kPa, 15 psi)	121° C (250° F) at 1 bar (100 kPa, 15 psi)	60° C (140° F) at 1 bar (100 kPa, 15 psi)	130° C (266° F) at 1 bar (100 kPa, 15 psi)
Max Operating Pressure	4.1 bar (410 kPa, 60 psid) at ambient temperature	5.2 bar (520 kPa, 75 psi) at ambient temperature	4.1 bar (410 kPa, 60 psi) at ambient temperature	4.1 bar (410 kPa, 60 psi) at ambient temperature
Typical Air Flow Rate	3.58 L/min at 0.2 bar (20 kPa, 3 psi)	40 L/min at 0.4 bar (40 kPa, 5.5 psi)	27 L/min at 1 bar (100 kPa, 15 psi)	L/min at 0.2 bar (20 kPa, 3 psi): 0.2 µm: 8 0.45 µm: 12 1 µm: 15
Product	AcroPak™ 300 Capsule with PTFE Membrane	HEPA Capsule	Vacushield® Vent Device
Applications	Bioreactor venting requiring high air flow rates.	Provides bacteria-free air for sterile applications.	Use between a pump and receiving vessel to protect valves and pump components from damage from aqueous solutions; also protects lab personnel from aerosolized contaminants.
Materials of Construction Filter Media	PTFE on a polypropylene support	Versapor® membrane (acrylic copolymer on a nonwoven support)	PTFE on a polypropylene support
Housing	Polypropylene	Polypropylene	Polypropylene
Pore Size	0.2 µm	1.2 µm (liquid filtration); 99.97% retention of 0.3 um DOP aerosol (following ASTM D 2986-95A)	0.45 µm
Effective Filtration Area	300 cm2	860 cm2	19.6 cm2
Inlet/Outlet Connections	Stepped hose barbs, 6.4 - 12.7 mm (1/4 - 1/2 in.) diameter	3/8 in. FNPT, includes optional hose barb fittings to accept 12.7 mm (1/2 in.) ID tubing	Stepped hose barbs 6.4 - 12.7 mm (1/4 - 1/2 in.)diameter; internal taper accepts standard male luer
Max Operating Temperature	60° C (140° F) at 2.1 bar (210 kPa, 30 psi)	88° C (190° F)	130° C (266° F)
Max Operating Pressure	4.1 bar (410 kPa, 60 psi) at ambient temperature	3.4 bar (340 kPa, 50 psi)	1 bar (100 kPa, 15 psi)
Typical Air Flow Rate	32 L/min at 0.07 bar (7 kPa, 1 psi)		8 L/min at 0.1 bar (10 kPa, 2 psi)