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Questions tagged [vacuum]

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89 questions
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I’m thinking of building a CRT (I believe it can be done), but I’ve hit a snag. I am planning on using either a 1000 mL or 2000 mL Erlenmeyer flask made out of borosilicate glass (Pyrex) for the tube. ...
Trewbot's user avatar
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1 answer
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I want to learn how to estimate the ultimate vacuum pressure that I could expect to see in a vacuum chamber that is pumped by a turbomolecular pump (which is itself backed by a diaphragm pump). Here ...
teeeeee's user avatar
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3 votes
1 answer
345 views

I'm annotating a German industrial machine schematic with English translations. I'm stuck at this one. The lower half shows two solenoids for vacuum generation (presumably venturi type) and the upper ...
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I must say that I don't have too much background in physics/engineering. I'm experimenting with hydroponics systems and wonder whether it is theoretically possible to achieve the output flow rate ...
user1876484's user avatar
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1 answer
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There are 2 circular plates with 6m OD and 5.8m ID. One plate is plastic and the other is metal. They are identical geometrically, and only vary by material. They rest on top of each other purely by ...
Don Quixote's user avatar
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3 answers
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Is there a good reason for designing a vacuum cleaner to cool itself using the air that it's just sucked up? I've been helping a friend with a lot of very-dusty DIY recently, and we've managed to ...
ConanTheGerbil's user avatar
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0 votes
1 answer
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I have a need to run cooling water through a pipe into a vacuum chamber. The vacuum chamber is at 0.7 to 10 pascal. This pipe will be filled with water. This water will be at a very low PSI, almost 1 ...
CakeMaster's user avatar
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2 votes
1 answer
103 views

I have experienced issues with gas pressure regulators failing open or loosing their set points when either the inlets or the outlets are exposed to hard vacuum. Gas pressure regulators that regulate ...
Gerard Puts's user avatar
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0 votes
1 answer
220 views

Question: Is there a rule of thumb for how many NPT threads are necessary to hold a vacuum? Or, better, is there a chart which shows how many threads are necessary for a given depth of vacuum? ...
Kenn Sebesta's user avatar
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0 answers
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I’m working on simulating a system where a rough vacuum is used to evaporate water. To do this, I need to perform a mass and species balance on the vacuum side of the system, but I’ve been having some ...
Priscillian26's user avatar
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0 votes
1 answer
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At my internship, I have a small crystal (about 5-8mm long by 2-5mm thick) that needs to be mounted in a vacuum chamber (which is 35mm on the inner diameter) to serve as a cathode with 1.0 to 1.5A of ...
monadoenchant's user avatar
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2 answers
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Basically I want to make a trap that sucks mosquitoes into a screen container for future studies, to do this I need to generate a vacuum and I need to choose whether to use a ducted fan (simpler) or ...
RHR's user avatar
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2 answers
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Questions are bold with context surrounding them. I am not an engineer. Well, I'm a computer scientist but I don't do this. I do, however, brew kombucha and am looking to scale up. I have a new ...
Matthew Jendrasiak's user avatar
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1 vote
1 answer
119 views

Consider an almost-rigid part on a vacuum table. There is a flat gasket underneath the part that exposes some portion of the bottom side of the part to vacuum. Let's say 50% of the bottom surface is ...
Brian Bell's user avatar
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1 answer
104 views

I am designing a Microwave based vacuum dehydration system for waste management sector and food dehydration. Currently I'm using a 3kw output 2.45GHz magnetron as heating element. My vacuum pump is an ...
Rohan Abraham Mathews's user avatar
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