Emflon® PFR filters have been developed from the successful Emflon filter range launched in 1981 and widely used as air and gas-sterilizing filters in the pharmaceutical and biotechnology industries. The Pall PTFE membrane is inherently hydrophobic, chemically inert and designed specifically for removal of contaminating bacteria and viruses. Emflon PFR filters meet the ever-increasing demand for air filters with greater strength, longer life and the ability to withstand the rigors of in situ steaming in the forward or reverse direction.
Emflon PFR filters provide high assurance of filter integrity and long-life, even during continuous use in hot air up to 60 °C and after repeat steamings for a typical period of up to 12 months. This is combined with high flow-rates and excellent de-wetting characteristics resulting in very economical filtration through the use of smaller installations and reduced energy costs. In addition, the filters can be tested in situ by the Forward Flow integrity test or by a Water Intrusion test. Both tests are correlated to liquid bacterial challenge — the ‘worst case’ challenge.
Emflon PFR filters have been extensively and scientifically validated using the most advanced methods and the most sensitive equipment available. They have a microbial removal rating of 0.2 µm in liquids and a particulate removal rating of 0.003 µm in gases and have been validated by:
Brevundimonas diminuta liquid challenge at 107/cm2
Brevundimonas diminuta aerosol challenge
PP7 and MS-2 bacteriophage aerosol challenge
Bacillus subtilus Var niger spores aerosol challenge
Airborne sodium chloride aerosol challenge at 100 L/min flow giving a 0.003 µm rating in gases
Internal Adapter Support Ring (MCY2230/4463 Styles Only)
Cumulative Steam Life1
Steaming in Normal Flow Direction up to 140 °C @ 300 mbar Differential Pressure2,3
1 Steam life validated using 1 hour cycles. 2 Reverse steaming: Up to 125 °C @ 300 mbar maximum ∆P for 10 cycles (for filter part numbers MCY4463PFR and MCY2230PFR). The steam life and service life data were determined by testing under controlled laboratory conditions up to the time indicated. Actual operating conditions may affect the filters long-term resistance to steam sterilization and hot air service. Filters should be qualified for each process application. 3 Excursion conditions only.
Maximum Differential Pressure
4.1 bar (60 psi) up to 80 °C
Differential Pressure at 50 Nm3/h (30 ft3/min) Air Flow and 2 barg (29 psig) Inlet Pressure2
500 mbard (7.25 psid)
200 mbard (2.9 psid)
160 mbard (2.3 psid)
120 mbard (1.7 psid)
80 mbard (1.16 psid)
640 mbard (9.3 psid)
175 mbard (2.5 psid)
80 mbard (1.1 psid)
2 Pressure drops are for filter elements only. To obtain the total pressure drop of a complete assembly the housing pressure drop must be added. Please refer to the relevant housing literature or contact Pall for specific sizing information.