Roots Vacuum Pumps

Roots vacuum pumps RUVAC, which are also called Roots blowers, are rotary plunger type pumps where two symmetrically shaped impellors rotate in opposite directions inside the pump housing. Roots pumps are used where great volumes have to be pumped. In combination with backing pumps, which compress against the atmosphere, these pumps are capable of improving the attainable ultimate pressure of a pump system by a factor of 10. With two Roots vacuum pump stages and a corresponding backing pump it is possible to attain pressures in the range down to 10^-5 mbar (0.75•10^-5 Torr). Regarding the motor concept RUVAC pumps are offered in different models.

RUVAC WH / WHU

The RUVAC WH / WHU series is equipped with a hermetically sealed motor without shaft seals and with an integrated water cooling facility. Moreover, it is provided with a purge gas option qualifying it for pumping corrosive and toxic gases. The RUVAC WHU types are equipped with an integrated bypass line incorporating a newly developed control flap. Thus the pumps can be started at atmospheric pressure and the pump down times in short cycle operation are considerably reduced.

Accessories

Frequency converter for RUVAC WH 4400 / 7000, 400 V, 18 kW