RRS roots-vane vacuum system is high vacuum system, which consist of RV roots vacuum pump as main pump and SV single stage rotary vane vacuum pump as backing pump in series, it take the advantages of high vacuum, compact structure, convenient for operate. Suitable for pumping common gas and condensable & non-corrosive gas. Widely used in big pumping speed and all kinds of high vacuum systems. Such as vacuum smelting, power capacitor, transformer, vacuum impregnation, vacuum coating and so on.