High Efficiency Gas Filter Sleeves

Porvair Filtration Group Polypropylene Gas Filter (PPGF) sleeves are constructed using a proprietary binder free, polypropylene fiber filter media structure that provides a highly permeable matrix with a low resistance to the flow of gas.

The filtration efficiency of the PPGF sleeves has been extensively tested and confirmed to be fully compliant with the requirements of T-SP-E-13.  This standard requires a gas filter to achieve 95% efficiency at the required particle size stated. The PPGF material has a gravimetric efficiency of 99.95% when tested over a size range of 0.75 to 10 micron.

PPFG filter sleeves are manufactured in a seamless circular method using a mandrill former, upon which the needling is performed. This process enables a filter media with a high void fraction (approximately 75%) to be produced, which provides the benefit of a high relative dirt capacity. The material has an ability to enhance filtration as it blocks through its compressive nature, ensuring that as it nears its end of life condition (determined through differential pressure) the material closes up and strengthens to prevent breakthrough of the retained solids.

The use of polypropylene in Porvair PPFG sleeves provides a material with an inherently
high resistance to chemicals, a broad thermal operating range and the ability to resist mechanical fatigue. Polypropylene has a relatively low surface energy (approximately 30mN/m) and therefore has a tendency towards hydrophobicity. This enables it to repel water that may be present in droplet forms in gas flows. The material is regarded as recyclable and therefore poses a minimal environmental risk when this is a consideration.

Further information on PPFG sleeves is available by contacting Porvair Filtration Group on +44-1489-864330 / +1-804-550-1660 or email info@porvairfiltration.com.
Porvair Filtration Group has supplied the process gas industry for over 25 years, with innovative and performance driven filtration equipment (elements, cartridges and vessels). The company is an international leader in the development and supply of materials and products for applications in filtration and separation. Their expertise in a wide range of media and the dedication of their design, manufacturing, sales, test and research teams ensure they are at the forefront of filtration technology, delivering world class performance to the Aerospace, Defence, Nuclear, Energy, Chemical Process, Industrial Process, Water Treatment, Printing and Life Science markets. With offices and manufacturing sites located in the UK, Europe and the USA combined with a world-wide network of market representatives and distributors, they pride themselves on their continuous innovation and research to meet global demands.