Negative pressure Roots blower

Negative pressure Roots blower 
Now many customers can't tell what is a negative pressure roots blower, what is a Roots vacuum pump, what is a vacuum pump, what is a Roots blower, and they made a simple mistake when they bought it. Now we summarize the following points. In the roots blower profession, the roots vacuum pump is what most people call a negative pressure roots blower. Its principle is the same as that of a Roots blower, which is a volume reverse blower Machine.
A reverse compressor in which two lobed rotors move relative to each other in the cylinder to compress and transport gas. The roots blower is simple in structure, convenient in manufacture and suitable for gas transportation and pressurization under low pressure. Conceptually speaking, roots blower is a kind of usage in vacuum pump. Positive pressure blower is used with large air volume. Its use is impossible for vacuum pump, such as water tank aeration, oxygen supply, powder transportation, etc.
There are several kinds of vacuum pumps, such as water ring vacuum pump, rotary vane vacuum pump, steam jet pump, molecular pump, reciprocating vacuum pump, fixed vane vacuum pump, slide valve vacuum pump, cycloid vacuum pump, roots vacuum pump, etc. the principle is to discharge the gas out of the pump through the change of the volume generated by the rotation of the structure of the biased rotor in the pump cavity, mainly in the suction process.
The volume of the suction cavity increases and the vacuum degree decreases. When the gas in the container is sucked into the pump cavity, the volume becomes smaller and the pressure increases during the exhaust process. After all, the gas inhaled is discharged out of the pump through the oil seal. In terms of parameters, most of the vacuum degree of the vacuum pump is higher than that of the roots vacuum pump, and the air volume is larger than that of other roots vacuum pumps, so the negative pressure can be smaller than that of the roots vacuum pump.