The primary components of the SF6 gas pump are the pump shell, main shaft, impeller, motor, and transmission components such bearings. In more detail, bearings are used on both ends of the motor shaft to connect it directly to the impeller. After the impeller has rotated, the gas enters with an axial flow before switching to a radial flow. Due to the larger cross section area of the volute, the gas then flows into the volute with a direction change and a slowdown. As a result of this slowing down, kinetic energy is transformed into pressure energy, causing gas SF6 to flow out of the fan outlet and circulate continually to cool the transformer.