Description
For Sterile Filtration of Gases
Emflon PFRW cartridges are sterilizing grade hydrophobic membrane filters designed for reliable retention of bacteria and high levels of phages in compressed gas and vent applications. The filter element features Pall's advanced 0.2 micron rated polytetrafluoroethylene (PTFE) double-layer membranes, pleated with very high area into single open-end cartridges. They are built to withstand demanding in situ steaming conditions in either the forward or reverse direction.
Even in the presence of high humidity or moisture, often the case in practice, Emflon PFRW cartridges provide sterile effluent and validated performance, ensuring process security. They are the cartridge of choice for critical sterile gas applications.
| Features | Benefits |
| Strongly hydrophobic 100% PTFE membranes | Prevents wetting out in humid conditions, even after repeated use and steaming cycles, allowing for unimpeded gas throughput |
| High area pleated, robust double-layer membranes |
|
| Multi-cycle in situ steam challenged in forward and reverse direction | Enhanced steaming resistance |
| 0.2 micron sterilizing grade filters based on liquid bacteria removal | Provides sterile effluent even in humid conditions, resulting in optimal protection of product, improved fermentation yields, and increased security in aseptic processes |
| Excellent aerosol bacteriophage retention performance | Provides superior bacteriophage protection of microbial cultures |
| Sodium chloride aerosol challenged for particle removal to 0.003 micron | High particle removal efficiency in dry gas |
| Water Intrusion Testable (WIT) | Enables in situ user integrity testing |
| 100% integrity tested prior to dispatch | Documented quality |
| Individually serialized modules | Full traceability to materials and production records |
Specifications
Materials of Construction
| Component | Description |
| Filter Medium | Double-layer PTFE |
| Support / Drainage | Polypropylene |
| Cage, Core, Fin End and End Cap | Polypropylene |
| Adaptor | Polypropylene with internal stainless steel reinforcing ring |
| O-ring Seal | Silicone Elastomer Ethylene Propylene Rubber |
Food Contact Compliance
Please refer to the Pall website for a Declaration of Compliance to specific National Legislation and/or Regional Regulatory requirements for food contact use.Technical Information
The technical information provided is based on controlled laboratory tests done on typical production filters at the conditions described, unless otherwise indicated. Actual operating conditions may affect the filter's performance. Nominal Filter Area: 0.8 m2 (8.6 ft2) per 254 mm (10") moduleOperating Characteristics in Compatible Gases1
| Maximum Differential Pressure | Operating Temperature |
| 5.3 bard (77 psid) (forward) | ≤20 °C (68 °F) |
| 4.1 bard (60 psid) (forward) | ≤80 °C (176 °F) |
1 Air, nitrogen, or other compatible gases.
Typical Service Life2 under continuous operating conditions
| Continuous gas service | 12 months to 60 °C (140 °F) |
| Vent service | 6 months to 80 °C (176 °F) |
2 For continuous gas flow above 60 °C (140 °F), Emflon HTPFRW filters are recommended. Emflon PFRW can be operated at higher temperatures for shorter periods.
Typical Flow Rates3
3 Typical clean Δp per 254 mm (10") cartridge, air at 20 °C (68 °F). For gases other than air and for multi-round cartridge installations, please contact Pall for proper sizing.
Autoclave and Steaming4
| Cumulative Steaming Time | Operating Temperature |
| 165 hours (1-hour cycles, forward) | 142 °C (287 °F) |
| 20 hours (1-hour cycles, reverse) | 142 °C (287 °F) |
| Maximum Steaming Conditions | Steaming Temperature |
| 1.0 bard (15 psid) (forward) | 125 °C (257 °F) |
| 0.3 bard (4.3 psid) (forward) | 142 °C (287 °F) |
| 0.5 bard (7.3 psid) (reverse) | 125 °C (257 °F) |
| 0.2 bard (2.9 psid) (reverse) | 142 °C (287 °F) |
4 For applications requiring autoclaving and sterlization, Pall recommends the use of Code 2 or Code 7 adaptors to ensure filter sealing after cooling. Cartridges should be cooled to system operating temperature prior to use. Data shown for forward steam flow also indicates autoclave resistance.
Performance
Quality
- Cartridges produced in a controlled environment
- Manufactured according to ISO 9001:2008 certified Quality Management System
Removal Performance
Emflon PFRW filters have a microbial removal rating of 0.2 micron in liquids and a particulate removal rating of 0.003 micron in dry gases.- Tested with Brevundimonas diminuta liquid challenge at ≥ 107 cfu/cm2 effective filtration area, according to ASTM Method 838-05. Provides sterile effluent according to FDA Guidelines (2004)
- Tested for particle removal at 0.003 micron in dry gases by NaCl aerosol CNC particle analysis
- Tested in accordance with ISO Standard for Compressed Air (ISO 8573-4 and test method ISO 12500-3:2009)5.
- MS-2 and PP7 bacteriophage aerosol challenge
- Brevundimonas diminuta aerosol challenge in forward and reverse direction and under long term challenge conditions in forward direction with humidified air
- Bacillus subtilis var niger spores aerosol challenge
5 For further information, please contact Pall.
Pall's Emflon filter family offers a variety of solutions for addressing microbial removal in air and gas applications.
Please contact Pall for further information.
Figure 1: Emflon HTPFRW cartridges provide sterilization of high temperature gases and and can be considered for use in oxygen-enriched air applications.
Figure 2: Emflon PFW cartridges are designed for sterilization of large volume gases in compact installations.
Figure 3: Emflon PFAW cartridges offer exceptionally high flow rates and are used for less critical bioburden reduction in gases.
Type
Filter Cartridges
Ordering Information
This information is a guide to the part number structure and possible options. For availability of specific options and housing details, please contact Pall.
Part Number: AB [Table 1] PFR [Table 2] W [Table 3]
Example Part Number: AB1PFR7WH4
See bold reference code in tables.
Part Number: AB [Table 1] PFR [Table 2] W [Table 3]
Example Part Number: AB1PFR7WH4
See bold reference code in tables.
Table 1: Nominal Length
| Code | Length |
| 056 | 127 mm (5") |
| 1 | 254 mm (10") |
| 2 | 508 mm (20") |
| 3 | 762 mm (30") |
6 Available only in Codes 2 and 7.
Table 2: Adaptor
| Code | Description |
| 27 | SOE – single open end with flat closed end, 2 locking tabs and external 226 o-rings |
| 3 | SOE – single open end with flat closed end and external 222 o-rings |
| 7 | SOE – single open end with fin end, 2 locking tabs and external 226 o-rings |
| 8 | SOE – single open end with fin end and external 222 o-rings |
| 28 | SOE – single open end with fin end, 3 locking tabs and external 222 o-rings |
7 AB05 configurations only.
Table 3: O-ring Seal Material
| Code | Description |
| H4 | Silicone Elastomer |
| J | Ethylene Propylene Rubber |
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