Hind Rectifiers Limited, known as Hirect, is a leading manufacturer of rectifier equipment and semi-conductor devices. It manufacturers a products used for railways, AC electric locomotives and AC electrical multiple units. The Company was incorporated in April 1958 and is presently engaged in developing, designing, manufacturing and marketing Power Semiconductor, Power Electronic and Railway Transportation Equipments. The company signed a technical collaboration agreement with Friem, Italy to manufacture water-cooling rectifiers for electrochemical applications. Based on this technology, it has received orders from Sterlite Industries, Chemfab Chlorates and Sree Rayalaseema Alkalies and Chemicals.