Roots type rotary lobe vacuum pump
200 - 2 000 m³/min | RVR series
PEDRO GIL
Roots pumps belong to the group of expulsion pumps with positive displacement Two symmetrical pistons with figure-of-eight cross-sections rotate with no contact between them or with the body: in opposite directions to each other, regularly engaged and housed inside the pump body. The pistons are activated by means of a pair of gears that synchronise their rotation movement and ensure that there is no friction. A bypass conduit regulated by the relief valve, connects the suction and the pulse of the pump.
Application
Roots pumps are used preferably in combination with former pumps, with a suitable ratio between the primary pump and various stages, large pumping capacities are reached with very low vacuums The applications of Roots pumps, forming groups with the primary pumps, are very varied and extensive, and they are recommended where high pumping speeds are required at low pressure. The RVR vacuum pump with recirculation is especially designed for applications in which the vacuum needs to be interrupted constantly, for instance, vacuum packaging of food, in order to protect the pump from these working conditions, it is provided with the recirculation by-pass conduit regulated by a relief valve, mis pump is very well suited for applications in which a frequency shifter cannot be used due to the fact that constant changes in the working conditions end up damaging the electrical motor.
