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This kind of pump can be found in all areas of industry where vacuum is required, from atmospheric pressure up to1x10-3 mbar (appropriately matched). Some examples are the food, electrical, mechanical, chemical industries and many others.
The main feature of these pumps is their use for the pumping of material which contaminates wastewater and their treatment of attendant liquids from the pump which makes them highly ecological. The same applies to vapour pumps where the purest recuperation is required. They are ideal for extremely short pumping cycles in large chambers.
They are designed to be activated ideally by flexible coupling, although they can be activated by belts and pulleys, taking the necessary precautions to not overload the driveshaft.
The shaft opening is secured by seals with an oil chamber, and includes a cooling chamber to eliminate the heat produced by the closure. The seals are made of fluoroelastomer VITON.
An initial stage pump is always required. Eight sizes of rotary pumps are manufactured with pre-inlets for nominal flows from 200 to 10,000 m3/h.
Root type pumps belong to the positive displacement group. Two symmetrical figure of eight pistons rotate in opposite directions without touching each other or the housing, appropriately geared and housed within the pump unit. Activation of the pistons is through a gearbox which synchronizes the rotation and guarantees absence of contact between them. Roots type pumps are better used in combination with an initial stage pump (liquid ring pumps, rotary vane pumps, etc.)
With an adequate coupling between the initial stage pump and different units, very good pumping capacity at very high vacuum can be reached. They are especially appropriate where high speeds and low pressure are required.