There are significant differences between Roots blowers and Roots vacuum pumps in multiple aspects. The following is a detailed comparison:
1、 Working principle
Roots blower: a type of positive displacement compressor that continuously compresses gas from the inlet to the outlet along the direction of rotation of two interlocked impellers, and discharges the gas. Roots blower is used to blow air with positive pressure.
Roots vacuum pump: It is also a type of positive displacement compressor that compresses gas from the suction port through two interlocked impellers, and then discharges the gas into the external environment, thereby creating a vacuum. Roots pump is used to suction and deliver gas, that is, to suction negative pressure.
2、 Main function
Roots blower: mainly used for conveying gas and gas pressurization. It can provide a large amount of gas flow within a pressure range, and is therefore widely used in fields such as air pressurization, sewage treatment, dust treatment, ventilation, and exhaust gas treatment.
Roots vacuum pump: mainly used to generate vacuum, can extract gas and discharge it to the external environment, suitable for semiconductor manufacturing, chemical engineering, medical equipment, vacuum smelting, vacuum degassing, vacuum drying, vacuum distillation, vacuum concentration of drugs and other fields.
3、 Structural characteristics
Roots blower: usually uses two three bladed or four bladed impellers, which are parallel to each other. In addition, Roots blowers usually do not require special sealing methods.
Roots vacuum pump: usually uses two hexagonal or octagonal impellers, which are perpendicular to each other. The structural design of Roots vacuum pump makes it more suitable for extracting gases and can more effectively discharge gases. In addition, Roots vacuum pumps have stricter requirements for sealing methods, as the quality of sealing directly affects the vacuum degree of Roots pumps.
4、 Usage scenarios
Roots blower: commonly used in light industrial and commercial fields, such as conveying air, emitting exhaust gases, etc.
Roots vacuum pump: commonly used in heavier industrial fields and scientific research experiments, such as vacuum drying, vacuum distillation, mass spectrometers in vacuum equipment, scanning electron microscopes, etc.
5、 Selection and Installation
Roots blower: When selecting, the main focus is on its pressure and flow characteristics, and installation usually does not require additional equipment to gradually increase the pressure.
Roots vacuum pump: When selecting, special attention should be paid to its vacuum degree and pumping rate. If a high negative pressure is required, a front-end pump needs to be installed to gradually increase the pressure.
In summary, there are significant differences between Roots blowers and Roots vacuum pumps in multiple aspects, and the choice of equipment depends on the specific application scenario and requirements.
