Vacuum System

Last month I gave a lecture on Vacuum Systems at a two-day workshop organized under TEQIP Networking aided by World Bank at BATU, Lonere. Besides giving an overview on vacuum system design, my objective was also to compare the different alternatives available to produce vacuum. For this I prepared a ranking matrix as below:

	EJECTOR	LIQUID RING VACUUM PUMP	DRY VACUUM PUMP
Vacuum Level	1	3	2
Capacity	1	2	3
Reliability	1	2	3
Environment	3	2	1
Initial Cost	1	2	3
Operating Cost	3	2	1

KEY – 1 is the best rank.