About us

Hindustan Dorr-Oliver Limited

About Us

A Leader in the industrial EPC market, Hindustan Dorr-Oliver Limited (HDO), has been providing state-of-art technology solutions to its clients for about 7 decades now. We have come a long way from our humble beginnings as supplier of proprietary solid-liquid separation equipment to being a major Engineering EPC player, assimilating new technologies and providing the best, most cost effective and integrated turnkey solution

HDO is well known as manufacturer of proprietary solid-liquid separation equipment’s like filters, classifiers, thickeners, clarifiers etc. besides manufacturing of pressure vessels, heat exchangers, storage tanks etc

RCF Ferilizer Plant 3

In India, Dorr-Oliver has sustained its presence since 1912 when it sold the first Dorr Rake Classifier to Kolar Gold Company opened in Mysore which was then imported. In 1946 the company opened an office in Mumbai from where it grew by leaps and bounds in its operations. In 1977 the business of the wholly owned subsidiary of Dorr Oliver in India was taken over by a Public Limited Company in the name and style "Hindustan Dorr-Oliver Limited".

Our History

HDO has been involved in major industrial projects in areas of Mining and Minerals, Water and Wastewater, Fertilizers and Chemicals and Pulp and Paper. We have done water management and effluent treatment for all major refineries in India. We have an excellent presence in Uranium ore processing from supplying equipment to the first uranium mill in Jagududa to now providing the complete uranium ore processing plant at Tummalapalle in Andhra Pradesh. We have excellent presence in Alumina refineries working on all new Greenfield projects. Ninety percents of phosphatic fertilizer plants were installed by HDO. We have the capability of providing the entire pulp mill. Our focus on quality and excellent project execution skills have brought us repeat business from our clients sometimes on purely nomination basis.

HDO has been involved in major industrial projects in areas of Mining and Minerals, Water and Wastewater, Fertilizers and Chemicals and Pulp and Paper. We have done water management and effluent treatment for all major refineries in India. We have an excellent presence in Uranium ore processing from supplying equipment to the first uranium mill in Jagududa to now providing the complete uranium ore processing plant at Tummalapalle in Andhra Pradesh. We have excellent presence in Alumina refineries working on all new Greenfield projects. Ninety percents of phosphatic fertilizer plants were installed by HDO. We have the capability of providing the entire pulp mill. Our focus on quality and excellent project execution skills have brought us repeat business from our clients sometimes on purely nomination basis.

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  • Rake Classifier invented in 1904 by Dorr Oliver - the first electromechanical major ore dressing device in the world.
  • First continuous Vacuum Drum Filter.
  • First Counter-Current Decantation system for mineral processing.
  • First Recausticising system for pulp and paper industry.
  • First Recausticising system for pulp and paper industry.
  • First Municipal Sewage Treatment Clarifier.
  • Early 1900's invention of Dorr Oliver Thickner - the first mechanically equipped, continuos sedimentation unit.
About HDO

We work for you since 1912

Dorr-Oliver began their journey as two individual entities at the threshold of the 20th century in USA. Dr. Dorr who began in the gold fields in North Dakota and Mr. Oliver was working in the gold fields of California. They both incorporated equipment companies which merged to be known as Dorr-Oliver.. their names became synonymous with thickners and filters respectively. Over the years, their fame reached far and wide as suppliers of quality products for treating solids suspended in liquids and gases. Today one of its strengths are in providing optimum solutions to problems involving fluid/particle dynamics throughout the process industries and for water pollution control. In every part of the world you will come across Dorr-Oliver equipment at work in minerals processing, pulp and paper production, food processing, chemical, petrochemical and carious industrial plants. Together the company's founders held 3000 equipments and process patents. In fact this rich tradition of innovation, expertise and professionalism still lies afresh in the spirit of the company.

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