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Membrane filter cartridges

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Specialists of our company were the first in Russia who developed the technology of production filter cartridges based on polymeric microfiltration membranes. Techofilter RME Ltd is one of the leading manufacturers of membrane filter cartridges in Russia and the CIS thanks to its more than 25 years of experience in the field of development and production of membrane filter cartridges.

Nowadays our company produces membrane filter cartridges on the basis of various polymeric materials:

A wide range of membrane filter cartridges gives an opportunity to solve any task for production of clarified and sterile liquids in a wide range of pH (1-14) and gases.

Technofilter’s membrane filter cartridges are produced both using proprietary membrane sheet and materials of leading worldwide manufacturers, thus guaranteeing stable high quality of products.

Some types of membrane filter cartridges are made from a membrane fabric of our own production, which allows controlling the quality of the product at all stages of the production cycle.

All filter cartridges are subjected to washing-out from organic and mechanical impurities with highly purified water and are subjected to 100% integrity control using the most modern devices.

Filter cartridges are produced under clean room conditions (Class C and D according to the classification of clean rooms in the pharmaceutical industry) in compliance with GMP regulations.

Membrane filter cartridges are tested for bacterial and toxicological safety. Each filter cartridge is assigned with an individual number and batch number. These data are specified on a product, on a label, in an individual Factory certificate and in the informational database of the enterprise.

All materials used in the production of filter cartridges have been tested for biological safety, have a minimum amount of extracted components and are allowed to contact with intravenous drugs and food products.

Membrane filter cartridges (EPM) are repeatedly sterilized by chemical reagents, gamma irradiation, autoclaving, steam in line and have certificates of compliance with safety requirements for polymeric products used in medicine, as well as sanitary and epidemiological conclusions permitting their use in the food industry.







The quality management system applied to the production of microfiltration membranes and filter cartridges is certified.


Membrane filter cartridges are intended for industrial filtration at pre-filtration stages (removal of biological load), clarification, maintenance and sterilization.

Membrane filter cartridges with a pore size of 0.1 to 3 μm, are pleated cartridges with a large surface area (up to 1 m2 per cartridge 10"), which ensure absolute retention of particles in the area of the specified pore size. Unlike depth filter cartridges, particle retention occurs predominantly on the surface of the membrane.

Due to the stable pore structure, membrane filter cartridges are used primarily as finishing (sterilizing) filters, which can be checked for integrity with the help of special devices.

Features and Advantages of Membrane Filter Cartridges 

Properties of membrane filter cartridges

Benefits for customer


Convenience in operation (ease of installation)

Large surface area (pleated)

The possibility of using high flow rates at low pressure.

High strength

Reliable preservation of the integrity of the filter under harsh operating conditions, withstand repeated sterilization by autoclaving.

Can be integrity tested

Microbiological reliability, guarantee of the integrity and efficient operation.


Tested and certified for use in medical and food industries.


Standard membrane filter cartridges have generally accepted design. It is a cylinder with the diameter of 70 mm and the height from 100 to 1000 mm, the cylinder consists of a filter bag containing a pleated membrane in one or two layers located between two layers of non-woven polypropylene fabric. A filter bag sealed around the edges by heat sealing is placed between two perforated polypropylene bodies that provide mechanical and thermal strength and stability of the filter cartridge during operation.

The cartridge is sealed at the ends of the filter package with polypropylene melt. End parts are welded to the ends of the cartridge. Depending on the type of filter holder, the cartridges can be produced with different adapters. The adapter is equipped with two O-rings made of silicone or fluorine rubber for corrosive media.

  1. Pleated membrane in one or two layers, located between two layers of non-woven polypropylene fabric. The membrane provides an effective filtration area.
  2. The adapter provides tightness of installation of a filter cartridge in the holder.
  3. The inner perforated body provides mechanical strength.
  4. The outer perforated body protects against mechanical damage.
  5. Disk plug or tail plug.

Materials of membrane filter cartridges


Membrane material

Pore size, μm




polyamide (Nylon6 + 66)

0.2, 0.45

for sterilizing filtration of liquids


polyamide (Nylon6 + 66)

0.1 - 3

filtration of liquids




polyamide (Nylon6 + 66) with Z-potential

0.2, 0.45

filtration of liquids


polyamide (Nylon6 + 66) with fiberglass pre-filter

0.65 - 3

filtration of liquids


polyethersulfone (PES)


for sterilizing filtration of liquids


polyethersulfone (PES)

0.2; 0.45; 0.65

filtration of liquids


hydrophilic fluoroplastic (PVDF)

0.2; 0.45; 0.65; 0.8

filtration of liquids




filtration of air and gases


fluoroplast-42                     (PTFE + PVDF)

0.45; 0.65; 0.8

filtration of air and gases


polypropylene (PP)


filtration of air and gases

Geometric characteristics of membrane filter cartridges

Height, mm







Height, inch







Inside diameter, mm


Outside diameter, mm


Types of adapters

А, А1, А4, D, D1, В, В(Sl)

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