PROSTEEL A filters provide the ideal solution in applications where traditional polymer based filters are limited by compatibility, exposure time or a combination of high temperature and viscosity. They are ideally suited to filtration of the solvents used in a wide range of process industries from pharmaceuticals, food & beverage and electronics through to paints and inks. The Parker domnick hunter range of stainless steel filters provides a solution to compatibility issues while maintaining absolute retention ratings down to 3.0 micron. 316L stainless steel fibres are sintered together into a graded pore structure. The efficiency of the media increases through the filtration bed resulting in excellent dirt holding capacity while maintaining high relative flow rates compared to alternative technology such as sintered powder tubes and metal membranes. The filters are available in two formats both using the same filtration media but one manufactured in a pleated construction and one in a cylindrical wrap. This allows a cost-effective selection depending on flow rate and dirt holding requirements.
PREPOR GP is a new prefilter that combines the strength of polypropylene with the microbial retention of glass fibre for demanding applications such as long term exposure to steam, high differential pressures or aggressive chemicals. The combined media will also provide a significant microbial reduction that makes PREPOR GP equally suitable for bioburden reductions in pharmaceutical liquids as well as offering excellent protection to sterilising grade membrane cartridges. By using graded density media, PREPOR GP has a higher voids volume (95%) and greater dirt holding capacity than surface filtration membranes which means that filtration costs are reduced without affecting the product quality. PREPOR GP can also provide excellent prefiltration to membrane filters in proteinaceous and high contamination applications by extending the life of the membrane cartridge and hence reducing filtration costs.
The BEVPOR range of membrane cartridge filters is available in a selection of retention ratings to provide protection of beverages from the effects of common spoilage organisms or to enable them to meet regulatory requirements. However, it is possible that other smaller microorganisms may be present that, whilst not affecting microbiological stability, may nonetheless be undesirable from a quality viewpoint. BEVPOR MS provides higher removal efficiency than BEVPOR PS, the basis of which is the recognised standard in the pharmaceutical industry for a 0.2 micron sterilising grade membrane(1). Specifically developed as a beverage grade cartridge, BEVPOR MS utilises an advanced polyethersulphone membrane configured to provide high flow and cost effective performance. The membrane has an asymmetric pore structure which provides graded filtration throughout its depth, resulting in increased capacity to hold contaminants. Componentry has been selected to maximise mechanical strength and chemical compatibility enabling the filter to withstand repeated chemical cleaning and sterilisation. (1)ASTM F838-83