Quick guide to F7 Pocket Filters
In basic terms the purpose of pocket filters is to remove unwanted particles from air. At CFP we help our customers improve indoor air quality so this guide focuses on the use of pocket filters, and in particular the F7 pocket filter, in the removal of noxious particles from air in HVAC systems.
How do pocket filters work?
Pocket filters (or bag filters as they’re also known) mechanically block the flow of particles in the air. Their tapered concertina design means they offer high air flow and dust retention capacities without taking up much space.
What are pocket filters used for?
Because they cater for a high dust load and offer flexibility to fluctuations in manufacturing processes – pocket filters are often preferred to cartridge filters for final filtration in industrial environments where powdery substances are used (like construction and some areas of food production) or where a high degree of dust removal is needed e.g. clean rooms where they are used in prefiltration for HEPA filters.
What are they made from?
Originally made using glass fibre media, they now tend to be made out of synthetic media like:
What does F7 mean when we’re talking about pocket filters?
Under the old BS EN 779 classification ‘F’ refers to the fact that the filter use is for ‘fine’ filtration and the 7 relates to the size of particle it will block. However, as of January 2017, a new test standard was introduced.
ISO 16890 will replace the previous standard EN 779 for filter testing and assessment completely with effect from mid-2018.
About ISO 16890
This new method for the evaluation of air filter elements classifies filter performance according to particulate fractions with the objective of enabling a more precise selection process for air filters going forward. Filter efficiencies will be determined with regard to the particulate classes PM1, PM2,5 and PM10.
Under the new standard F7 pocket filters become ISO ePM1 50 % to 65 %.
Benefits of F7 filters
Customisable – dimensions and frame construction to suit application
F7 ProSyntex Filter
F7 ProSyntex air filters are manufactured using a three stage filter system to deliver a class-leading, energy efficient clean air solution. They are the pocket filters of choice for leading AHU manufacturers, facilities management companies and major brands throughout the UK.
Three layered filtration with built-in pre-filter provides fine filtration combined with high dust holding capacity and arrestance to deliver a low initial and high final pressure differential.
Cost-effective: three stage system means improved service life, reducing the frequency of filter changes and consequently labour costs and waste to landfill
EN 779:2012 approved: this third party industry standard provides peace of mind that the filters will perform to the highest standards. It is also tested to fire prevention requirements DIN 53438-3 (F1).
Environmentally friendly: ProSyntex filters are Oeko-Tex 100 approved meaning they are free from harmful substances and skin irritants. They can also be fully incinerated rather than going to landfill.
M5-F9 AirSyntex Pocket Filter
CFP is also able to offer our customers our range of AirSyntex Pocket Filters which are available from M5-F9, offering consistent energy efficient performance and great value for money.
Suitable for a wide range of environments including retail, commercial, healthcare, education, engineering, hotels, leisure and pharmaceutical, M5-F9 AirSyntex Pocket Filters are a fully compliant, clean air solution.
To find out more about F7 pocket filters and improving the quality of your indoor air, call the friendly team at CFP on 0161 406 5050.