Home Industry solutions Pharmaceutical industry Filtration of steam, air, nitrogen, carbon acid and other gases
Obninsk Filters has extensive experience in solving problems of cleaning gaseous media in the food and pharmaceutical industries. Equipment for the purification of steam and gases with a capacity from 10 l/h to 500 m3/h.
Filters for compressed air, nitrogen, carbon dioxide and other gases
Filter elements made of fluoroplast-4 and ultra-high molecular weight polyethylene (UHMWPE) clean the air from the drip liquid due to its hydrophobicity. This property does not allow water to penetrate into thin pores until a certain excess pressure is reached. Moisture and oil vapors have higher dynamic viscosity values than dynamic viscosity values of air and other gases, and efficient separation of water and oil vapor occurs on the surface of the hydrophobic filtering layer. Since the main pollutants of both organic and inorganic nature are in gases in aerosol particles, the filtration purification of gases causes their drying and purification from impurities of different nature at the same time.
The hydrophobicity of the filtering materials is a significant positive difference between the filtering elements of fluoroplast-4 and UHMWPE from the elements used for the same purpose from porous metals and metal ceramics. The undoubted advantage of fluoroplast-4 and UHMWPE is their almost absolute inertness and neutrality, i.e. materials in no way affect the medium being filtered and do not change themselves under the action of the medium being filtered.
For the purification of gases, it is recommended to use a cascade two-three-stage purification system. First two steps – Dust, moisture, oil separation and the production of clean dried gas. Third Stage – production of sterile gas.
At the first stage, gas is pre-cleaned using filter elements made of modified brand polyethylene ECOPLAST-PE-G or fluoroplastic-4 brand ECOPLAST-FG with a particle retention threshold of 5 μm. The final cleaning should be done as close as possible to the points of use, using hydrophobic depth or membrane filter elements made of fluoroplastic of the trade mark ECOPLEN-FG with a particle retention threshold of 0.5 or 0.2 μm.
The multi-layered structure of filter elements provides increased dirt holding capacity, and the elements of the work resource are not inferior to foreign analogues. High thermochemical stability of filter elements allows filtering of any, including highly aggressive media in a wide range of temperatures (from -30 to 180 °C). There is a possibility of sterilization in accordance with the requirements of OST 42-21-2-85, multiple regeneration and reuse of filter elements.
Filters for steam
The steam is an aggressive environment. Mechanical and aerosol inclusions in the form of scale, soot, moisture vapor and oil are due to the method of steam production and its transportation to the place of use. Steam cleaning is also proposed to be carried out in one or two stages using fluoroplast-4 hydrophobic filter elements. Fluoroplast-4 filter elements operating temperature – up to 170 °C. The choice of the filter element retention threshold depends on the task.
Filter housings for steam and gas filters
To meet the challenges of gas cleaning, special-designed filter housings are manufactured that have a condensate trap with a drain valve. NPP « Express Eco » produces a series of filter housings, the choice of which depends on the volume (mass) gas flow.
Single-cartridge filter housings are designed to clean steam at the points of use at a rate of up to 80 kg/h. They are installed in-line caps down to the possibility of collecting and discharge of condensate. Connection to the line with quick-release clamps.
Multi-cartridge filter housings DMPM-НС-300-500 brands are intended for use in cleaning processes from mechanical particles and moisture of large volumes of gases or steam (up to 500   ; cubic meters per hour).
These filter housings are made of stainless steel and consist of a body with five seats for the filter elements and a cylindrical cap with a pressure gauge. The body has an elliptical bottom, which acts as a condensate collector. A pipe for condensate discharge is welded to the bottom.
The internal volume of the filter holder does not exceed 25 l. therefore it is not subject to the restriction – “the manufacture and operation of pressure vessels”.
By special order, these filter housings are made with thermal protection of polyurethane foam.
Selection of equipment and filter elements
| Purpose | Gas consumption, m3/hour | Enclosure | Replaceable filter elements |
|---|---|---|---|
| Steam consumption, kg/h | |||
| Pre-filtering | 150-300 | Multi-cartridge filter holder DFMP-NS-300 (5 elements with height 250 mm) |
ECOPLAST-RE-G or ECOPLAST-F-G with a rating of 5 μm |
| 150-350 | ECOPLAST-F-G with a rating of 10 µm | ||
| 80-150 | One-cartridge filter holder DF-HC-600-A7 |
ECOPLAST-RE-G or ECOPLAST-F-G with a rating of 5 μm | |
| 80-150 | ECOPLAST-F-G with a rating of 10 μm |
||
| 20-80 | One-cartridge filter holder DF-NS-300-A7 |
ECOPLAST-RE-G or ECOPLAST-F-G with a rating of 5 μm |
|
| 20-80 | ECOPLAST-F-G with a rating of 10 µm | ||
| to 20 | One-cartridge filter holder DF-HC-150-A7 |
ECOPLAST-RE-G or ECOPLAST-F-G with a rating of 5 μm |
|
| to 20 | ECOPLAST-F-G with a rating of 10 μm |
||
| Sterilizing gas filtration and fine steam cleaning | up to 100 | Multi-cartridge filter holder DFMP-NS-300 (5 elements with height 250 mm) |
ECOPOR-F42 and ECOPLEN-F-G with a rating of 0.2 μm |
| 150-300 | ECOPLAST-F-G with a rating of 1 μm |
||
| up to 50 | One-cartridge filter holder DF-HC-600-A7 |
ECOPOR-F42 and ECOPLEN-F-G with a rating of 0.2 μm P |
|
| 80-150 | ECOPLAST-F-G with a rating of 1 μm |
||
| to 20 | One-cartridge filter holder DF-NS-300-A7 |
ECOPOR-F42 and ECOPLEN-F-G with a rating of 0.2 μm |
|
| 20-80 | ECOPLAST-F-G with a rating of 1 μm |
||
| to 10 | One-cartridge filter holder DF-HC-150-A7 |
ECOPLEN-F-G with a rating of 0.2 μm |
|
| to 20 | ECOPLAST-F-G with a rating of 1 μm |
Filter elements for cleaning compressed air, steam, carbon dioxide and other vapors can be installed in the hulls of other manufacturers.
All products received hygienic certificates for use in the food industry. All technical requirements for filtration equipment are agreed with VNIIPBT. Products are recommended for use in the food industry.