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Vacuum Pump.

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Vacuum Pump.

Unread postAuthor: warhead052 » Fri Aug 05, 2011 6:43 pm

http://www.harborfreight.com/automotive ... 96677.html

I know its harbor freight, but for the price it may be worth trying. I wish I knew about this when I had a hard time sealing a couple air tanks... I thought I would let you guys know, its on sale for $14.99 right now.

My question about it is, could one use the outlet to compress air?
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Unread postAuthor: POLAND_SPUD » Fri Aug 05, 2011 6:48 pm

that is not a pump... it's a venturi tube

you need an air compressor to operate it

EDIT
lol I love that bulky plastic casing... I guess it does a fine job at hiding the simplicity of the 'pump'

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Unread postAuthor: warhead052 » Fri Aug 05, 2011 6:55 pm

POLAND_SPUD wrote:that is not a pump... it's a venturi tube

you need an air compressor to operate it


Seriously? Ok, well then I guess this thread is of no use anymore then...
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Unread postAuthor: mattyzip77 » Fri Aug 05, 2011 7:54 pm

Hmmmmmmmmmmmmmmmmmmmmmmmmmm, it says that itis a pump???? wouldnt that be false advertising????
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Unread postAuthor: jsefcik » Fri Aug 05, 2011 8:05 pm

mattyzip77 wrote:Hmmmmmmmmmmmmmmmmmmmmmmmmmm, it says that itis a pump???? wouldnt that be false advertising????



matt i think it would be
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Unread postAuthor: MrCrowley » Fri Aug 05, 2011 8:51 pm

mattyzip77 wrote:Hmmmmmmmmmmmmmmmmmmmmmmmmmm, it says that itis a pump???? wouldnt that be false advertising????

Would it count as some sort of velocity pump though?

Wikipedia wrote:Rotodynamic pumps (or dynamic pumps) are a type of velocity pump in which kinetic energy is added to the fluid by increasing the flow velocity.


Technically, the venturi tube increases the velocity of the fluid as it flows through the constricted section of pipe.
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Unread postAuthor: jimmy101 » Sat Aug 06, 2011 10:09 am

It is a pump, no question about it. It just uses compressed air to create a vacuum instead of a say an electric motor driving a piston.

The major limitation is that it is designed to only pump with the high pressure side fixed at atmospheric pressure. So it can't be used as a compressor. But since it is operated by a separate compressor that really isn't an issue.

Not really such a bad device. For $15 you can add vacuum capability to a shop compressor in a way that is easier than trying to plumb to the air inlet of the compressor.
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Unread postAuthor: warhead052 » Sat Aug 06, 2011 10:51 am

Yeah, but its still kind of false advertising. They say its a "Pump" when there is no pump in it.
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Unread postAuthor: saefroch » Sat Aug 06, 2011 2:02 pm

warhead052 wrote:Yeah, but its still kind of false advertising. They say its a "Pump" when there is no pump in it.

jimmy101 wrote:It just uses compressed air to create a vacuum instead of a say an electric motor driving a piston.
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