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Filters Technical Review

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High Efficiency Particulate Air (HEPA) & Ultra Low Particulate Air (ULPA) Filters

High Efficiency Particulate Air (HEPA) filters and Ultra Low Particulate Air (ULPA) filters are made of a spun-hooked glass fibre, rolled into a paper-like material, which is then pleated, increasing the filter’s surface area. FILT AIR’s HEPA and ULPA filters comply with various standards from organizations such as the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE), the American Institute of Architects (AIA), and the Joint Commission for the Accreditation of Healthcare Organizations (JCAHO).

HEPA and ULPA filters screen particles larger than 0.3 µm and FILT AIR’s HEPA filters are 99.99% efficient in removing 0.3 µm and larger particles. FILT AIR’s ULPA filters are 99.9995% efficient in removing particles that are 0.12 µm and larger. When these high efficiency filters are used with a prefilter, they can last for several years in a cleanroom environment. In addition to this, because airflow capacity will decrease and the static pressure will increase with time, FILT AIR’s HEPA filters and ULPA filters have the ability to become even more efficient as the filter loads.

HEPA and ULPA filters are used widely in air filtration and purification systems to control airborne particulate levels and to stop the spread of toxic agents or infectious diseases. FILT AIR’s HEPA filters are often used in HVAC systems, biological safety cabinets (such as the Bio Safe), laminar flow hoods, and various healthcare facilities worldwide. Laminar flow hoods are not designed to control infectious diseases or toxins, but medical facilities such as isolation rooms (the IsoArk™), Intensive Care Units (ICU’s), and surgical centres / operating rooms also use HEPA filters and ULPA filters to remove infection and contamination by airborne microorganisms such as viruses, moulds, and spores.

Specially designed for use in cleanrooms and precision assembly areas, FILT AIR’s HEPA and ULPA filters come in a wide range of sizes for many applications. They can also be used in final-filtration applications with purification filters. The filtration medium consists of highly efficient microporous polyurethane minipleats that are held in place with rigid plastic separators that keep the filter medium from nesting together. The design channels the air flow with optimal efficiency and reduces resistance. The filter is sealed into a sturdy aluminium frame with a fire-retardant adhesive.

There are several important provisions to consider when looking for HEPA filters and ULPA filters, including: porosity, efficiency, filter length, height and width or ring size, and ply. Filter porosity is measured by the average number of pores-per-linear-inch (ppi), which provides an open cell that offers little air restriction to fine-celled foam for maximum particulate filtration. Efficiency is the ability of HEPA filters and ULPA filters to remove a certain amount of particles of a certain size with a specific airflow. Ply refers to the layers of media that are contained in the filter. The filter’s ply can be anywhere from one to five, and in special circumstances even greater than five.

All of FILT AIR’s HEPA filters are tested for air flow resistance and DOP (dioctylphthalate) smoke penetration with a mean particle diameter of 0.3 microns by measuring upstream and downstream concentrations with a laser, achieving the rating of 99.99% efficiency with particles 0.3 microns or larger in diameter.

Since different processes of air filtration and purification need different levels of air cleansing and purification, at FILT AIR we help to analyze and specify your requirements, producing a match for your specific needs and FILT AIR Ltd. has developed a complete range of high efficiency filtration solutions.

Download brochure Gas Turbines Filters Catalogue

> Air Filters

Air Filters

Panel / Compact Filters

One of the most common air filtration products (high efficiency filtration) are panel filters and compact filters, applied in a variety of industries. These include filters for HVAC, cleanrooms, clean environments, healthcare facilities, laboratories, and more.

Both the panel filter and the compact filter (also known as v-shape or v-bank filter) are based on a pleated structure. It is this structure that allows greater quantities of air to pass through the filter, while reducing pressure and accumulating more dust and particles within the filter due to increase of the filtration area.

The Filt-Air panel filters and compact filters offer customers advantages:

  • Septal sizes tailored to your needs. In addition to standard filter sizes, we are able to deliver almost any size required.
  • Precise pleating technology. This unique capability ensures greater efficiency and durability over time.
  • Customized production of filter frames using a variety of materials (including. ABS, coated steel, and stainless steel), latches and handles, to meet specific standards and regulations.

Terminal Filter

Clean environments often require terminal filters that can be connected directly to the air supply or the planum.

Clean areas such as cleanrooms face a range of filter challenges, including lack of ceiling space, filter maintenance, and filter replacement. Yet with our terminal filters, you need not worry.

Over the past two decades, Filt-Air has delivered large quantities of terminal filters to a range of facilities and industries, including pharma, security, and microelectronics.

The Filt-Air terminal filters provide a range of unique advantages, including:

  • Innovative designs
  • Flexible filter housing sizes
  • Simple-to-replace filters – and simple to access

Bags Filters

Panel Filter

Bags Filters

Panel Filters

Gas Absorption Filter

Also referred to as carbon filters, the Filt-Air gas absorption filters prevent penetration of gases into a given space. These gas absorption filters differ from partial filtration solutions (such as Fine Dust, HEPA, and ULPA), as they contain active carbon that can absorb a variety of gases. The filters may contain either granules of active carbon or a combined particle filtration media that is soaked with carbon – to ensure optimal outcomes.

The use of carbon filters is of the utmost importance for industries who deal with harmful gases, including biological institutes, chemistry manufacturers, radioactive research centers, and semiconductor manufacturers. In addition, these are widely used by defense authorities for protection against CBRN threats.

Our main advantage in the field of gas absorption filters is that we are a member of the BE Group, who began their activity in this field more than 50 years ago.

Join our long list of customers around the world who already benefit from Filt-Air products.

Power Stations / Gas Turbines

In today’s world, gas turbines are one of the most widely used power generating technologies. Gas turbines are a type of internal combustion engine, in which the burning of an air-fuel mixture produces hot gases that spin turbines, converting them into power.

As this process consumes huge quantities of air, it needs to be treated properly. Air contains a variety of elements, especially different sized particles – which could affect the efficiency of such power stations or even seriously damage them.

By employing innovative engineering capabilities, Filt-Air’s gas turbine filters enable increased air quantities combined with decreased pressure drops. This is especially important as poor inlet filtration could lead to significant erosion of surfaces (by approx. 10-micron particles), fouling of compressor blades (by 2–10-micron particles), and corrosion due to salts and acids. As such degradation processes are irreversible, they could result in serious damage to extremely costly turbines, while decreasing power generation.

Download brochure Gas Turbines Filters Catalogue
Hepa Ulpa Filters
Panel / Compact Filters