Clean Room Hepa Filter Specification

The filtration system is the heart of a cleanroom.

Clean room hepa filter specification.

In situ aerosol filter testing is a black art to many but the new isoen14644 3 test methods standard incorporates two in situ test methods that are discussed here by neil stephenson of dop solutions. A typical hepa filter is a nominal 2 x 4 lay in type 99 99 efficient 0 3 micron particle size hermetically sealed ducted aluminum terminal units. Contact us for more information regarding clean room classifications requirements and iso 14644 1 cleanroom standards or call us at 888 984 8801 with any questions that you may have. The key component is the high efficiency particulate air hepa filter that is used to trap particles that are 0 3 micron and larger in size.

The common assumption that a hepa filter acts like a sieve where. Common standards require that a hepa air filter must remove from the air that passes through at least 99 95 european standard or 99 97. The use of high efficiency particulate air hepa filters having filtration efficiency of 99 97 down to 0 3 microns is another distinguishing feature of cleanrooms. The fibres are typically composed of fiberglass and possess diameters between 0 5 and 2 0 micrometer.

This process allows clean filtered air to continuously flows from clean to less clean spaces allowing for continual air movement. P airtech is one of the leading sellers of hepa filter. All of the air delivered to a cleanroom passes through hepa filters and in some cases where stringent cleanliness performance is necessary ultra low particulate air ulpa filters are used. Hepa and ulpa cleanroom filtration.

Filters meeting the hepa standard must satisfy certain levels of efficiency. Integrity testing of hepa filters. We offer very high quality products which meet the doe united states department of energy standard. In theory for an entire room to reach iso 6 air cleanliness you need to enter the cleanroom via an iso 8 ante room then go through an iso 7 to finally get into the iso 6 as shown in the image.

The use of high efficiency filters. In reality however you can reach an iso 6 clean room with 1 recommendation is 2 airlock. The standard high efficiency particulate air hepa filter will filter the air down to 0 3 microns at an efficiency or 99 975. Typically medical use hepa filtration systems also incorporate high energy ultra violet light units to kill off the live bacteria and viruses trapped by the filter media.

Some of the best rated hepa units have an efficiency rating of 99 995 which assures a very high level of protection against airborne disease transmission. The hepa filters for stringent cleanrooms are normally located at the terminal end and in most cases provide 100 ceiling coverage. The filters are designed to filter the particulates in the air down to sub micron sizes.