Question

What is the principle construction and working of screw pump?

Answer 1

 both corrosive and clean duties the widely used oil lubricated rotary pump has certain disadvantages. In corrosive applications aggressive vapors and/or abrasive particles tend to contaminate the lubricant of the pump, which shortens its service life, while in clean applications the lubricant may cause contamination of the vacuum process. To overcome these problems a new multistage pump has been developed to work from atmospheric pressure to 0.01 mbar without any lubricant within its pumping chamber. The pump is a …