Hindhivac rotary vacuum pumps are crafted for research together with industrial applications. These water cooled vacuum pumps are tailored specifically for continuous vacuum pumping operations. Raw materials are chosen keeping in view of the continuous pumping requirements. Fine grain special grade, Castings and, Pressure tight high carbon steel for internal parts are hardened and ground to close tolerances. These rotating vacuums pumps ensure noise and vibration at negligible minimum levels. Compactness and minimum oil charge are the highlights of the design feature. The double stage vacuum pumps have gas ballast facility to pump most condensable vapors without any notable oil contamination. A filter is included within the gas ballast valve to prevent atmospheric dirt when accessing the pump. An ant suck, Back facility prevents oil entering the system in the event of pump being switched off due to power failure. Application impregnation, Nuclear particle study, Electronic air conditioning, Lamp exhausting, Tube evacuation and refrigeration, Gas circulation, Freeze drying, Vacuum forming, Filtration, Metalizing, Distillation, Vacuum lifting, Dehydration, Packing operation, Vacuum metallurgy, Vacuum sublimation, Bottle filling operations etc.