The Principal of CFS
Pall® CFS (Cluster Filter System) has been in industrial use since 1995, and is today the brewing industry’s reliable, economic successful technology for the cold stabilization of beer. Successful membrane filtration of beer requires two somewhat opposite processes to take place:
- Low and gentle flux during beer filtration, to ensure the beer is not affected by the dynamic forces across the membrane
- High and robust flux during rinsing and cleaning
Generally, membrane systems are a compromise of these two requirements. The patented CFS technology offers the brewery an alternative that optimizes both criteria. Cluster filtration, groups filter elements into clusters. With each cluster having its own individual outlet valve.
During filtration all clusters are open. Cleaning, sterilization and integrity testing is done cluster by cluster.
The Advantages of the CFS Principle
The unique cluster principle offers the brewery significant advantages, primarily these are:
- Prolonged service life
- In-situ integrity testing
- Individual cluster integrity diagnosis
- Specific rinsing
- High specific flux velocity
- Short rinsing time
- Constant stream over all cartridges
- Minimized water consumption
- Fast changing of the filter element
- Controlled backflush
- Minimized beer losses
- High biological safety
- Permanent availability
The combination of the in situ
integrity testing of the cluster filter and the 100% integrity testing of the membrane cartridges during manufacture lends the CFS to form a robust part of any brewery’s HACCP procedures.
The system not only ensures the microbiological consistency of the brand produced for consumers, but also acts as an effective indicator of any manufacturing process variation.