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Filtering capsules
Description
Capsules are ready-for-use factory-assembled single-piece filters designed as minicartridges soldered into polypropylene holders. This design makes it possible to use the capsules without installing the filter holder. Capsules are intended for rapid and effective filtration of small volume batches of liquids and gases. They are especially effective in critical applications where filtration of individual batches of the product is needed (one-off use). Since washing followed by autoclaving remains possible, capsules can be used many times until the capacity of the filter surface is fully exhausted.
Capsule filters can be used for small-scale pilot testing at early stages of filtration system development to select the optimum combination of filters, especially for processing of hard-to-filter solutions, avoiding investments in stainless steel equipment. Capsule filters have highly strong leak-proof polypropylene shells and incorporate various filter materials in a broad spectrum of pore sizes.
Advantages of capsules over flat disc filters
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Properties of capsules
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Benefits for the consumer
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Compact, light-weight, leak-proof
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Easy and reliable in use
Safe for autoclaving
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Factory-assembled, pre-tested, ready-for-use filtration systems
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No need for investing in the filter unit
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Contain no metal parts or gaskets
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Chemical stability is solely dependent on filter material. Perfectly suitable for solutions containing ferments that are sensitive to metals
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Considerably larger filter area compared to 142 mm and 293 mm disc filters
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Possibility of filtering large volumes at high rates. One capsule can contain various filter layers (combinations of different pore sizes and materials), ensuring high-flux fractional separation
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Capsule filters incorporating KFM (КФМ) microfiltration membranes
Design
KFM capsule filter is a two- or one-layer pleated membrane minicartridge pressed into a one-piece polypropylene shell which is 126 mm high (including pipe sockets) and 92 mm in diameter. The effective filter area of a capsule is 0.125 or 0.14 m2, which is approximately equivalent to that of 2 standard discs 293 mm in diameter.
Capsule filters can have two types of connections:
- ½" thread connection for hoses
- 1 ½" three-clamp connection (standard)
In the course of capsule filter production, all membrane filter elements are washed with high-purity water and 100% integrity tested. Two-layer capsule filters are available with the same pore size combinations as respective grades of cartridge membrane filters. The capsule filter elements are included into the State register of medical products, have a conformance certificate for medical industry and sanitary certificates authorizing their use in food industry.
Main applications
КFМ.К/КFМ.К+ capsule filter
Biopharmaceutics and healthcare
- Clarification and sterilization of small or medium-size (up to 600 l) batches of liquids, e.g. injection solutions, culture media
- Filtration of individual batches of solutions
- As a final filter in filling machines having small hold-up volumes
- Removal of pyrogens at the final stages of treatment of water for injections
- As a replacement for 293 mm disc filters
Electronic industry
- at the points of use of ultrapure water (removal of bacteria and colloids)
- filtration of individual batches of photoresists
Food industry
- final filtration in the cases where small batches of beverages are produced
- filtration of ingredients
- for experimental purposes when selecting the optimum fineness of filtration
КFМ.F capsule filter
- Sterilization of the venting air for small storage tanks (‘breathing' of tanks)
- Sterilization of compressed air, gases, CO2
- Removal of particles and ‘mist' from laboratory air lines
- Protection of air used in instruments
- Clarification and sterilization of non-aqueous solutions, aggressive media
КFМ.FG capsule filter
- Filtration of individual batches of solutions
- Filtration of process water for bottles and vials
- For experimental purposes when selecting the optimum fineness of filtration in various industries
КFМ.PES capsule filter
- Filtration of individual batches of solutions having low or high pH levels
- Filtration of highly viscous media, including ophthalmological preparations
- Filtration of protein solutions in the cases where sorption should be avoided
- Filtration of process water for bottles and vials
Materials of construction
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Name
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КFМ.К/ КFМ.К+
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КFМ.F
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КFМ.FG
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КFМ.PES
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Filter membrane
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Polyamide (Nylon-6), Z-potential
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Ftoroplast 4 (PTFE-Teflon) Ftoroplast 42 (hydrophobic)
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Ftoroplast 42 (hydrophilic)
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Polyethersulfone
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Drainage layer
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Polypropylene
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Capsule shell
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Polypropylene
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Technical and operating characteristics
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Name of parameter
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КFМ.К capsule filter (polyamide membrane)
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Average pore size of the membrane, μm
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0.1
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0.2
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0.45
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0.65
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0.8
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1.0
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Minimum bubble point, MPa
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0.50
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0.33
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0.24
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0.17
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0.12
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0.10
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Initial flow rate for distilled water at t=20°C / P=0.05 MPa, m3/h, no less than
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0.10
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0.20
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0.35
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0.45
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0.50
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0.60
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Maximum operating pressure, MPa
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0.5
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Maximum differential pressure, MPa
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0.5 at 20°C; 0.1 at 60°C
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Maximum operating temperature, °C
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60
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Effective filter area, m2
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0.14, one-layer; 0.125, two-layer
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Number of sterilization cycles (by autoclaving) at P=0.11 MPa / t=121±1°C for 45 min, no less than
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10
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Example of order: КFМ.К-045/020
Technical and operating characteristics
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Name of parameter
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КFМ.F/КFМ.FG capsule filter (Ф42 fluoroplastic membrane)
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Average pore size of the membrane, μm
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0.15
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0.25
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0.45
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0.65
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Minimum bubble point, MPa
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0.33
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0.22
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0.11
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0.08
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Initial flow rate for air at t=20°C / P=0.05 MPa, m3/h, no less than
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3.0
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5.0
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10.0
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15.0
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Initial flow rate for distilled water at t=20°C / P=0.05 MPa, m3/h, no less than
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0.15
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0.25
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0.45
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0.65
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Maximum operating pressure, MPa
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0.5
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Maximum differential pressure, MPa
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0.5 at 20°C; 0.1 at 60°C
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Maximum operating temperature, °C
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60
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Effective filter area, m2
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0.14, one-layer; 0.125, two-layer
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Number of sterilization cycles (by autoclaving) at P=0.11 MPa / t=121±1°C within 45 min, no less than
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10
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Example of order: КFМ.F-025/015
Technical and operating characteristics
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Name of parameter
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КFМ.PES capsule filter (polyethersulfone membrane)
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Average pore size of the membrane, μm
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0.20 0.45 0.65
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Minimum bubble point, MPa
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0.33 0.24 0.17
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Initial flow rate for distilled water at t=20°C / P=0.05 MPa, m3/h, no less than
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0.40 0.70 0.90
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Maximum operating pressure, MPa
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0.5
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Maximum differential pressure, MPa
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0.5 at 20°C; 0.1 at 60°C
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Maximum operating temperature, °C
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60
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Effective filter area, m2
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0.14, one-layer; 0.125, two-layer
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Number of sterilization cycles (by autoclaving) at P=0.11 MPa / t=121±1°C for 45 min, no less than
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30
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Example of order: КFМ.PES-045/020
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