Introduction to Micro Oil Free Vacuum Pump Knowledge:
With the development of the instrumentation industry and people's demand for environmental protection, micro oil-free vacuum pumps have emerged in various countries, and there are generally the following rules:
1.The price of the pump is closely related to the vacuum degree index. The vacuum degree index is the main indicator that manufacturers in various countries strive to pursue, which reflects the overall strength of corresponding fields such as mechanical processing, sealing technology, and material science, and is also an important means for manufacturers to obtain profits. To improve the vacuum degree index, higher sealing conditions are necessary. Therefore, it is necessary to use components with more precise dimensions and better material properties, resulting in a significant increase in production costs. And the increase in price is far greater than the increase in vacuum degree index. Of course, an increase in pumping rate can also cause a price increase, but the increase is not significant. Therefore, when choosing a micro vacuum pump, it is necessary to carefully consider the vacuum degree index, pumping rate index, and one's own usage situation, in order to best balance performance and cost.
2. Due to the use of highly precise sealing components, high vacuum micro pumps have higher requirements for the cleanliness conditions, temperature parameters, and medium composition of the working environment.
3. Vibration and noise. The higher the pumping rate and vacuum degree of the pump, the greater the vibration and noise.
2, The difference between micro oil-free vacuum pumps and gas sampling pumps
1. Usually, we refer to small volume pumps that can generate negative pressure as micro vacuum pumps, but strict distinction should be made when selecting products.
2. In the true sense, micro vacuum pumps (such as PK, PC series, etc.) are pumps that can vacuum sealed containers for a long time, and can drive larger loads. When gas sampling pumps (such as PM, PB series, etc., see details) work, the pressure difference inside and outside the pump chamber is small, so the load it carries is very small. It is precisely because of the different requirements for load capacity that there is a significant difference in the spare parts used for micro vacuum pumps and gas sampling pumps.
3. Micro vacuum pumps have high requirements for both diaphragm and motor. For these two main components, technical indicators such as fatigue strength, reliability, and lifespan are required to meet the standard under loaded conditions, while gas sampling pumps only require compliance under extremely light loads (tests have shown that gas sampling pumps are prone to damage with slightly larger loads). Therefore, there is a significant cost difference between the two types of micro pumps.
4. In summary, if a micro oil-free vacuum pump is used for gas sampling, it will inevitably achieve high reliability and longer lifespan, but the cost is relatively high; If the gas sampling pump is used in situations with slightly larger loads, its reliability and lifespan will be greatly reduced, and it may even not work properly, although it has significant cost advantages. It is best to consult the technical department clearly when selecting models, in order to balance cost and performance. Some gas sampling pumps can also achieve good vacuum and flow indicators. However, achieving this technical specification and being able to work reliably for a long time under this specification are two different things. For example, if a certain micro pump can achieve a vacuum degree of 30KPa, can the vacuum pump work reliably when the pump's suction port is often at this vacuum degree? Therefore, the indicators that a vacuum pump can achieve and its reliable operation are different. Please make sure to confirm with the manufacturer or distributor when purchasing.
