Structure and characteristics:

Roots slide valve vacuum unit is a vacuum unit composed of common roots pump as the main pump and slide valve vacuum pump as the backing pump in series. Through vacuum relay or electric contact pressure gauge,the automatic opening and closing and automatic overload protection of Roots pump slide valve pump are realized. The whole unit is installed on a frame, equipped with pipes,valves,electrical operation control box and cooling water pipe system. The unit is compact in structure and convenient to use According to the size and limit pressure of the evacuated system,the ratio of nominal pumping speed between the pumps of the vacuum unit is generally between4:1 and 10:1. The former is more suitable for larger vacuum systems and works at lower inlet pressure or limit vacuum for a long time than the latter. In order to prevent the oil from returning when the slide valve pump stops, this series of units is equipped with an electromagnetic charging valve on the inlet pipeline of the front stage, and its action is linked with the motor of the front stage pump. Before the slide valve pump stops, it charges the pump port to ensure that the vacuum oil in the slide valve pump returns to the oil tank, and at the same time,it prevents the vacuum system from being polluted by the vacuum oil.

USE：

Roots slide valve vacuum unit has obvious energy-saving effect, high vacuum degree and large air extraction in high vacuum interval, which can be widely used in vacuum impregnation and vacuum drying process of transformers, wires and cables and capacitors in power industry. Vacuum coating, vacuum smelting, vacuum heat treatment, vacuum oil filtering and freeze drying; Ideal vacuum equipment for aviation simulation test. If gas containing a small amount of water vapor or dust is sucked, a filtering device should be installed.