venturi vacuum or vacuum pump
venturi vacuum or vacuum pump
(OP)
Hi,I would appreciate if any of you knowledge people can advise me which is more energy efficient.
I work in the beverage industry which uses filling, rinsing, labeling and case erection machines. Some machines use venturi systems for vacuum and others use vacuum pumps.
My questions are which system is more energy efficient, venturi or a pump?
What are the advantages/disadvantages/limitations between both?
Any other additional info would also be helpful.
Thanks in advance.
Steve
I work in the beverage industry which uses filling, rinsing, labeling and case erection machines. Some machines use venturi systems for vacuum and others use vacuum pumps.
My questions are which system is more energy efficient, venturi or a pump?
What are the advantages/disadvantages/limitations between both?
Any other additional info would also be helpful.
Thanks in advance.
Steve





RE: venturi vacuum or vacuum pump
A venturi system has no moving parts and therefore no wear (and is probably costs less). Also, it requires less space and it is easy to clean.
RE: venturi vacuum or vacuum pump
RE: venturi vacuum or vacuum pump
We rebuild packaging machines and case erectors every month. We almost always take out the venturi and install a vacuum pump.
Venturis just make the compressor run more and more.. the vacuum pumps we use are now very reliable and need no maintenance.
Charlie
www.facsco.com
RE: venturi vacuum or vacuum pump
It is true that Ejectors have no moving parts to wear out, thus maintenance is generally less. However, excessive moisture in the motive gas line can cause erosion, but spare parts can be easily fitted. In my experience it is far easier to fit a new nozzle and diffuser to an Ejector than having to dismantle a mechanical vacumm device where the tolerances are generally more critical.
Ejectors can be made from any material which can be machined or welded. This is of particular advantage in corrosive applications. On the other hand, I find the available material options for vacuum pumps is much more limited.
Ejectors can handle solid material and liquid slugs without incurring mechanical damage. The same is generally not true for all vacuum pumps.
Ejectors dont present an electrical hazard.
Although it is a bit dated now, have a look at Chapter 8 of Ryans and Roper "Process Vacuum System Design & Operation" McGraw-Hill 1986
RE: venturi vacuum or vacuum pump
I agreed with the efficiency statements to start, but if you compare a bunch of small vacuum pumps with one large compressor I am not so sure.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube