Hindustan Dorr Oliver Limited (HDO) is an Indian EPC company having its core business activities in providing Engineered Solutions, technologies and EPC installations in Liquid-Solid Separation applications.Hindustan Dorr-Oliver Limited has a new face. HDO is now a wholly owned subsidiary of M/s. IVRCL Infrastructures and Projects Ltd., who are one of the leaders in Indian infrastructure industry, having core business focus on total Water Management including pumping, conveyance, treatment and distribution, national highways, roads, buildings, hydro-electric projects, power distribution, desalination, etc.