D I engineers has emerged as the leading manufacturer of positive displacement pump. Manufacturer in Indian sub continents offering largest range of efficient, economical, elegant & compact Rotary gear, Twin gear pump for all viscous and semi viscous liquid application under brand name of ROPAR company started its business in year 2001-01 as a small proprietary venture to design, development, manufacturing and market these pumps starting with small, low cost general purpose gear pump as a standard product readily available in the market through the net work of dealer.