How the two rotors of Roots vacuum pump equipment are arranged in the pump body determines the overall structure of the pump. There are generally three schemes for the overall structural arrangement of Roots vacuum pump equipment:

　　1. Vertical Roots vacuum pump equipment: the axes of the two rotors are installed horizontally, but the plane formed by the axes of the two rotors is perpendicular to the horizontal plane. In this structure, the intake and exhaust ports of the pump are set horizontally, and the assembly and connection pipes are relatively Convenience.

　　2. Horizontal Roots vacuum pump equipment: the axes of the two rotors are installed horizontally, and the plane formed by the axes of the two rotors is horizontal. The air inlet of the pump with this structure is above the pump, and the exhaust port is below the pump. (There is also the opposite).

　　3. Vertical shaft type of Roots vacuum pump equipment: the two rotor axes of some foreign Roots pumps are installed vertically with the horizontal plane. The assembly clearance of this structure is easy to control, the rotor assembly is convenient, and the floor area is small, but the assembly and disassembly of transmission mechanisms such as gears are inconvenient, and the lubricating device is also complicated.

　　4. Roots pump with overflow valve: In order to prevent accidents caused by overload, a relatively reliable safety protector is installed on the Roots pump, that is, an overflow valve is installed on the bypass pipeline. When the exhaust port is at the specified pressure, the relief valve is closed.

　　5. Roots vacuum pump equipment Roots pump with steam condenser: When steam needs to be sucked, the suction unit must be designed with a condenser that will condense the steam. This condenser can be installed before or after the pump. Instead of being installed on the pump body of the Roots pump.