Interrupt the vacuum with RVR pumps.
The recirculating RVR vacuum pump has been especially designed for applications where it is necessary to interrupt the vacuum constantly, for example in the vacuum packing of food. To protect the pump in these working conditions, we have incorporated a recirculation bypass controlled by an overpressure valve.
This pump is ideal for applications where it is not possible to use a frequency converter, due to the constant changes in working conditions which would mean the deterioration of the electric motor. Given that the pump is equipped with the bypass, it is possible to start the Roots pump and the initial stage pumping simultaneously since the machine can work temporarily without a high initial stage vacuum. It is advisable not to work within a range of pressures which may provoke the permanent opening of the bypass since the gas would continually heat up and reach the heat limit of the machine.
