DLW stands for Diesel Locomotive Works, a locomotive-producing unit of the Indian Railways.  The Indian Railways operates as a government-controlled organization and boasts of one of the largest railway networks in the globe.  In total, the railway network operated by the Indian Railways extends through more than 70,000 miles with more than 7000 train stations across India.  Through its DLW unit, the Indian Railways is able to produce locomotives that are diesel and electric-powered.

Diesel Locomotion Works operates in the area of Manduadih which is part of Varanasi City.  As a locomotives producer, DLW is considered the largest in all of India.  Operations of DLW as a locomotives unit started back in 1961.  Three years later, the first production of locomotives was rolled out.  The locomotives produced by the DLW are said to be standard versions of original GM EMD and ALCO design structures.  In terms of production capacity, the DLW unit is able to make around 250 locomotives in a given year.  Most of the products that come out of the DLW plant in Varanasi City are intended for use by the extensive railway network of Indian Railways.  Aside from internal use though, many products of DLW are exported to other countries including Bangladesh, Malaysia, and Sri Lanka among many others.  There are also other customers within India particularly those that are involved in private rail network systems, sea ports, and some power plants.

Aside from standard diesel-electric locomotives, DLW also produces diesel-powered generator sets.  These so-called DG sets are said to be best for stand-by operations mode and well-suited for various base load applications.  Features of DLW DG sets include very high efficiency and operational reliability.  These generator sets also save on operations cost by means of its minimal fuel usage.  The best thing about DLW products is that they are built and manufactured according to international standards and guidelines.