Profile: Hira Foundry & Engg. Works is a manufacturer and supplier of refining machines, paper disperger discs and disk refiners. Our disk refiners include single, double and twin disk refiners. They are made of high strength alloys. They are used in the refining of waste paper pulp, bagasse pulp, hard & soft wood pulp and rice straw pulp. Our disperger disc is prepared by combining six pieces.