How to protect dry screw vacuum pumps from corrosion?

Vacuum plays a vital role in several industrial processes, including pharmaceutical and chemical processes. Whether in inertization, vacuum conveying, distilling, or drying, vacuum is generally used to make the procedure work smoothly, fastly, and safely. However, there are various types of vacuum technologies. These include:

• Liquid ring vacuum pumps and steam ejectors are the types of pumps used for decades to generate vacuum and work as robust workhorses.
• Rotary vane vacuum pumps are also used to generate vacuum, but they have one advantage: these pumps have recirculating oil lubrication that smoothens the industrial vacuum systems process.  

While liquid ring vacuum pumps don’t have recirculating oil lubrication thus, they require operating fluid to reach the process gas during the procedure.

 

 

 

Working principle of dry screw vacuum pump

Dry vacuum pumps consist of two screw rotors that rotate in clockwise and anticlockwise directions. While the pumped medium is sandwiched between the screw chambers and the cylinder. So it gets compressed and later transferred to the outlet for further procedure. However, during this procedure, a gap remains in between the screw rotors, and they never come in contact with the cylinder. Further, cooling can be done through water or air cooling.

How to protect the vacuum system?

Typically, vacuum pumps deal with several risk factors depending on the process gas. Thus, it’s crucial to use process gas which can minimize such risks. Further, to protect the dry vacuum pump, you must also focus on the various components that can be fixed on the pressure side or inlet. So it can quickly transfer the pressure gas without even damaging the pump.

It’s called a vacuum system, and to safely operate this vacuum system; it’s crucial to protect it from deposits and corrosion. It can happen due to polymerization or crystallization.

Protection against corrosion 

• Firstly, it’s crucial to prevent the entering of corrosive materials inside of the vacuum pump. It can be achieved by using gas scrubbers or upstream condensers.
• Secondly, use a specific operating temperature to keep the streaming process in the gas phase.
• Thirdly, it’s better to use compatible materials to boost the vacuum pump performance and prevent corrosion.  

In short, the dry screw vacuum pump can help perform the industrial vacuum systems process without the help of operating fluid. So it can compress the pressure gas to transfer to the outlet quickly. But for this, it’s better to use corrosive-resistant materials.