Pneumatic booster pump is widely used in the industrial field. It has the characteristics of high reliability, maintenance free and long service life. It is divided into gas booster pump and gas-liquid booster pump. Their working principles are the same. Although these two types of pump products belong to gas booster pump, their booster media are different, Here is the difference between gas booster pump and gas-liquid booster pump.

从名字上就可以看出，气体增压泵是主要用于气体（氮气、氦气、氧气等）的增压的，而液增压泵是主要用于液体（水、液压油、乳化液等）的增压；虽然，两种的工作原理相同，但在加压部分上是不同的，气体增压泵的加压部分是活塞式，气液增压泵的加压部分是柱塞式。

It can be seen from the name that the gas booster pump is mainly used to pressurize gases (nitrogen, helium, oxygen, etc.), while the liquid booster pump is mainly used to pressurize liquids (water, hydraulic oil, emulsion, etc.); Although the working principles of the two are the same, they are different in the pressurizing part. The pressurizing part of the gas booster pump is piston type and the pressurizing part of the gas-liquid booster pump is plunger type.

气液增压泵是不能用来增压气体的，这是由于气液增压泵的工作腔内存在间隙，在压缩腔内，气体会压缩膨胀，但是，值得注意的是，气体是不能被压缩出去的，而对于气体增压泵来说，其大多也用来增压气体，在增压液体上几乎是很少用到的，所以，在一般情况下，气体增压泵和气液增压泵是不能混用的，这也是由于这两种泵所选用的密封结构不同而导致的，所以，这点一定要记住气体增压泵和气液增压泵是不能混用的。

The gas-liquid booster pump cannot be used to pressurize gas because there is a gap in the working chamber of the gas-liquid booster pump. In the compression chamber, the gas will compress and expand. However, it is worth noting that the gas cannot be compressed. For the gas booster pump, it is also used to pressurize gas, and it is rarely used in the pressurized liquid, so, In general, gas booster pump and gas-liquid booster pump cannot be mixed, which is also caused by the different sealing structures selected by the two pumps. Therefore, it must be remembered that gas booster pump and gas-liquid booster pump cannot be mixed.