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Filter Bags are woven or non-woven in nature. Urja is in the field of manufacturing only woven fabrics from Fiberglass. The count of yarn and weave pattern can be altered to determine the pore size for filtration. Fiberglass is strong, durable, chemically resistant and non-hygroscopic in nature. Long tubular bags stitched from Fiberglass Fabrics are used for hot flue gas filtration. Special finishes or coatings are imparted on theses fabrics to ensure adequate filtration. A commonly used mixture of graphite, silicone and PTFE has been used since many years. Urja offers specific fabrics for demanding applications and chemical attacks.

Fiberglass filter fabrics are woven in either plain or leno weaves. Plain weave is used where fine filtration is required and Leno weave fabrics are used where mesh size required is more open. A leno weave locks yarns in the fabric and this gives more dimensional stability.

PTFE (Polytetra-fluoro-ethylene) is a synthetic fluoropolymer accidentally invented by Roy Plunkett that finds numerous applications. It is well known by the DuPont band name Teflon. PTFE is a material of remarkable properties; non-stick, friction-free, self-lubricating, non-wetting, non-flammable, non-brittle, non-toxic, resistant to atmospheric conditions, resistant to fungus growth and resistant to all chemicals (except molten alkali metals and fluorine at elevated temperatures and pressures). Its electrical properties are equally outstanding. All properties are maintained over a wide working temperature range of -200oC to +350oC.

The process of air filtration involves separation of solids from gases by interposing a barrier through which only the clean gas can pass. This barrier is known as a filter medium. A filter medium must satisfy the requirements of efficient flow rate, satisfactory mechanical and chemical resistance and quality of filtrate or cake. Dust particles pollute the air and therefore adequate filtration is necessary prior to their discharge. Environmental regulations have become more demanding and it is our moral responsibility to save and protect our environment. It is obligatory on the part of industry to ensure that air being emitted is clean, without dust or harmful chemicals.

A conveyor belt, as we know, is a continuous loop of material that rotates around two or more pulleys. Conveyor belts are used for shifting transporting material from one end to another. Belts are made from materials like rubber, steel, technical textiles etc.