The lenticular module concept offers a compact, self contained, liquid filtration solution utilizing proven filter media technology.
Lenticular Filters are essentially composed of depth filter media, supported on a polypropylene skeleton and supplied on modular form, normally comprising 16 cells of either 12” or 16” diameter. They offer all the advantages of tradition sheet filtration, but in a totally enclosed, sterile, environment, thus eliminating product loss and external contamination. They are designed to fit industry standard housings incorporating 1,2,3 or 4 modules. Lenticular Filters are used on a broad range of applications, from the filtration of whiskey and other distilled spirits, wines, beers/ lagers, through to the clarification of fruit juices. They also find use in the pharmaceutical, cosmetic and chemical processing industries. In common with filter sheets in a filter press, the type of lenticular used can be chosen to specifically suit the application.
Product Benefits: • The system is pre-assembled and as such is very convenient to use. Consequently
significant productivity gains can be achieved due to short changeover times.
• The range of filter media which can be incorporated in this design permits use of the lenticular system in a wide variety of applications.
• The totally enclosed construction of the system is ideal where hygiene is important or the conditions hazardous.
• The design of the Lenticular gives improved lateral strength and rigidity.
• Heavy duty non-woven polyester scrim gives improved resistance to back pressure shock and much improved back washing capability in addition to the provision of an appreciable degree of prefiltration prior to the depth filter medium.
• Pre-compression during manufacture to precise dimensions eliminates the need for additional tightening down procedures.
• Advanced design of the polypropylene separator discs and sealing rings promotes a more even liquid flow within each cell. This in turn reduces the pressure drop across the filter module, leading to longer filter life and filtration cycles plus more consistent filtrate quality.
• Both flat gaskets and double o-ring end fittings are available to fit all lenticular housings.
Specifications
The lenticular filter modules are of either 12" (300ml) or 16" (400ml) diameter, to match the appropriate housing. Each module is normally made up of 16 cells. Each cell consists of 2 discs of filter media formed around an internal, all polypropylene skeleton. The outer edges of the media are sealed with an injection moulded polypropylene strip.
The complete filter module is assembled from up to 16 cells packed together with a special internal polypropylene structure allowing the formation of a completely sealed, pre compresed unit. These modules can then be used in a single or multiple housing, stacked end to end up to 4 high. End seal is via either flat gasket or double o-ring bayonet fitting.
Rinsing with lenticular module In most applications the assembled lenticular filtration unit is flushed with clean cold water to ensure that nay contaminants entrained during the preperation for filtrartion removed. This is done in the forward direction typically for 10 minutes.
Hot water/chemical sanitation and steam sterilisation Lenticulars are designed to be hot/water/chemical sanitised and steam sterilisable. The duration of this sanitation/sterilisation procedure and the maximum number of sterilisation cycles is dependent upon application.
Filtration Stages After flushing and sanitation/sterilisation the lenticular system is now ready for the filtration of the product. Filtrartion flow rates + differential pressures achievable will be dependent on product + lenticular grade.
Hot water cleaning/back flushing Post filtrartion the lenticular can be forward and reverse flushed with hot/cold water.
Storage When not in use modules can be stored in certain sanitised liquids, either in or out of the housing.
Specifications applicable to both 16” and 12” Compressed module height Inc. 2 flat gaskets: 272 +/- 2mm : 165 +/- 3mm :52+/- 3mm
Matrix, end cap, sealing ring: Material:- Natural Polypropylene
Outside sealing of filter discs: Complete & regular injected Polypropylene outer seal of filter discs.
Materials: Fixing Straps: Silicone (standard), nitrile, PTFE, Viton or EPDM
O-Ring Seal: Silicone (standard) EPDM, or Viton
Scrims: Non woven polyester
Also Available in Bayonet Fittings.
Lenticular module Operating Parameters Max Operating Temp: 65˚C
Max Pressure: 2.5 bar
Max Back Pressure: 0.5 bar
Steam Sterilsation temp/time: 120˚ C for 20 min (max)
Steam Cycles: 5 max
How water temp/time: 80˚ C for 20 min (max)
How Water Cycles: 30 max
Operating Parameters for 12" and 16" housings,
basic and advanced models Max Operating Pressure at 20˚C: 8 bar
Max Operating Pressure at 95˚ C: 6 bar
Max Operating Temperature with EP seal: 120˚ r
Max Operating Temperature with Silicone seal: 145˚ C
Technical Specification for 12" and 16" housings,
basic and advanced models Housings Material: AISL 16L
Type of Seal: EP (standard)
Polishing: Stanadard Mechanical, electropolish on request
Range Available The range of the depth filter media available in lenticular format includes:
• W2 filter aid support grades for DE filtration or coarse filtration.
• Medium grades ie XE5 throught to XE50 for course filtration
• Clarification and polishing grades ie XE70 through to XE400
• Sterilising grades to remove bacteria and some viruses ie XE675 through to XE1700
• Low pyrogen, low ion and low cacium grades for use in Pharmecuetical and other applications
• Specialist grades ie Carlcarb Proc3 Activated Carbon grades and Por4, Carlson's PVPP grade
