A bag filter system is one of the most popular filtration methods for liquid process applications. It provides a versatile, cost effective and consistent filtration system suitable for a broad range of applications from small batch operations to bulk processing. Bag filter housings are available in a wide range of materials and sizes, and can handle any fluid types and flow rates in the range of 1m3/hr to 640m3/hr. Replacement filter bags are selected from the broadest possible range of media. The required filter media is determined by the size of the particles to be removed (0.5 – 1500 microns), the type of particles to be removed (deformable or non-deformable), the required retention efficiency (60 to >99%) and the chemical and temperature compatibility of the media.
Standard Filter Bags
Allied Filter Systems Ltd manufactures high quality liquid filter bags to fit standard size filter vessels, as well as custom designed products where requested. The constituent materials have been chosen for their purity, consistent high quality and repeatable performance. Filter bags are available in traditional stitched form or with a fully welded construction, and are fitted with a comprehensive choice of rings.
Extended Life Filter Bags
Increased thickness of the filter media compared to that of the equivalent standard felt filter bag enables an increased retention of particles. In addition, the extended life filter media has a graded density structure i.e. progressively smaller particles are captured as the fluid follows a tortuous path through the media, stopping the filter bag from blinding prematurely. The result is a filter media with a higher dirt holding capacity, leading to increased filter bag lifetime.
MBP 200 Series High Efficiency Filter Bags
The MBP 200 Series high efficiency bags are available rated at 1-25 micron, and perform to efficiencies >95%. The filter bag consists of up to 4 layers of melt blown polypropylene media, including an outer cover to prevent fibre migration into the filtrate as well as providing added support to the filtration media. The high density of small diameter fibres compared to that of a standard needlefelt enhances particle retention, leading to superior, highly efficient filtration.
MBP 300 Series High Efficiency Filter Bags
Allied Filter Systems Ltd has developed the MBP 300 Series, a unique range of absolute rated filter bags rated from 1 – 10 micron, performing to an efficiency of >99% at the stated micron rating. For processes requiring absolute filtration, the use of filter cartridges has previously been the method of choice to achieve high performance in critical applications with consumable filter elements.