For the selection of Roots blower, what is the normal range of pressure of Roots blower?

Roots blower is three or two blade. The principles are actually the same. Through the rotation of the impeller, the volume of air is forced from the inlet end to the exhaust end, ignoring the return flow (related to the exhaust pressure, speed, temperature, etc., but the number is small), and each fan is transported. The air volume is constant, so the air volume of the fan is actually proportional to the fan speed. The higher the speed, the greater the air volume. Moreover, the air volume is almost only related to the speed (ignoring the above factors). In short, it is a displacement machine, which can push the wind from the inlet end to the exhaust end.

Roots blower is a positive displacement fan. There are two three blade impellers rotating relative to each other in the space sealed by the shell and the wallboard. Because each impeller is an involute or epicycloid envelope. The three blades of each impeller are the same, and the two impellers are the same, which greatly reduces the processing difficulty. Numerical control equipment is used in the process of impeller processing to ensure that the two impellers can maintain a small gap regardless of the position of the two impellers when the center distance is constant, so as to ensure that the gas leakage is within the allowable range.