nguyenvannam2904
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Question with vacuum pump system for laboratory
When finding a suitable vacuum pump system for my lab, I found out Nurdrage video on Youtube about Venturi aspirator pump.
The link : https://www.youtube.com/watch?v=tYLlkTDstmo.
In video, he said that we can attach the aspirator vacuum pump with a gas compressor instead of water pump to avoid messing.
However, I don't know the specifications requirement for the gas compressor ( pressure in PSI or flow rate in litre/min )
Any guy have solution for this problem?
I love to hear from you guy <3
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Syn the Sizer
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Check you other thread I already answered there.
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nguyenvannam2904
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Oops, I've just deleted the post on computing techniques thread as the topic doesn't relate to thread. Excuse for my fault 
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Syn the Sizer
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Np, I didn't mean any offense.
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Fyndium
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Aspirator is able to get to 32mbar at 25C due to vapor pressure. Apparently the vapor pressure would be lower if the water is cooled 0C.
Industry uses steam ejectors, but that would be exceedingly noisy and robust for a home lab I think. Same goes with gases, I believe you will need
tens of bars of pressure to run a decent aspirator and generating that pressure, well, you know what an air compressor sounds like.
I think that water pump would be the best option, it seems very quiet and it lacks the issue of sucking all the nasties into rotary pump. You need a
water reservoir, a pump with power cord, aspirator and some tubing for inlet, outlet and vacuum line. And water, of course.
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Syn the Sizer
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That was my though too in his other post, I felt if tye was going the compressed air route, they might as well just hook the compressor inlet to the
vacuum barb with a couple traps to catch harmful vapours and not bother with the hassle of adjusting the pressure.
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