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 Post subject: Vacuum pum vs refrigerator compressor
PostPosted: Wed Jul 07, 2010 1:33 am 
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Joined: Wed Nov 15, 2006 5:48 pm
Posts: 104
Location: Guadalajara, Mexico
Hi I'm ready to buy my vacuum pump

And I am looking for a ROBINAIR whit 3 CFM and 1/3 hp for $440.00 dlls
or a budget vacuum pump (refrigerator compressor) for $100 dlls

but just not sure if the ROBINAIR pump its to much for just doing wood-core boards and divinycell cores.

or if a refrigerator compressor its just enough for this task.

did some one knows how much presure can pull on vacuum bag each one of this pumps???

I need to run the pump for 8hrs or more,,,, so the refrigerator compressor can handle this???
:bye:


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Wed Jul 07, 2010 3:12 am 
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Joined: Mon Oct 08, 2007 4:39 am
Posts: 544
I think that you may be able to find something in between price wise.


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Wed Jul 07, 2010 3:46 am 
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Joined: Thu Aug 31, 2006 4:23 pm
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Location: North Bay, ON, Canada
I am no expert, but my friend has been building skis, surfboards and kiteboards for years using a refrigerator compressor. You can pick them up for really cheap and work like a charm.


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Wed Jul 07, 2010 8:11 am 
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Joined: Sun Dec 15, 2002 1:00 am
Posts: 247
Location: Slovenia
You can get refrigerator compressors for free from a used refrigerators throwen to trash.
Greetings,
Jaros


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Thu Jul 08, 2010 12:41 am 
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Joined: Wed Nov 15, 2006 5:48 pm
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Location: Guadalajara, Mexico
thanks for your answers!!!

I know its way cheaper to get the compressor,,,

that's way I'm asking if it really makes a big difference?

If the ROBINAIR vacuum have 3 cfm (I don't know what this is) how many cfm the compressor have??

how many negative pressure can generate one pump vs the other???

I want to know because I want to make the better board I can.

cheers!!
:thumb:


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Thu Jul 08, 2010 5:57 am 
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Joined: Sun Dec 15, 2002 1:00 am
Posts: 247
Location: Slovenia
Hi,
From my experience refrigerator pumps can generate the negative pressure of about 0,8.
Greetings,
Jaros


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Thu Jul 08, 2010 12:12 pm 
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Joined: Tue Jan 02, 2007 11:50 pm
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Location: Ottawa, Canada
CFM is Cubic Feet per Minute. For sucking air out of a huge bag on a huge project this might matter. As long as you don't have huge leaks in your system, I don't think the CFM rating should be an issue.

I have used a refrigerator compressor and it can pull all the vacuum that 99% of builders would need I think.

Peter


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Thu Jul 08, 2010 5:48 pm 
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Joined: Wed Nov 15, 2006 5:48 pm
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Location: Guadalajara, Mexico
foam-n-fibre wrote:
CFM is Cubic Feet per Minute. For sucking air out of a huge bag on a huge project this might matter. As long as you don't have huge leaks in your system, I don't think the CFM rating should be an issue.

I have used a refrigerator compressor and it can pull all the vacuum that 99% of builders would need I think.

Peter

:cooltext:

tanks man!!! this make me more confident on save some money that I can use for other tools! or kites :naughty:


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 Post subject: Re: Vacuum pum vs refrigerator compressor
PostPosted: Thu Jul 08, 2010 9:27 pm 
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Joined: Wed Sep 09, 2009 5:57 pm
Posts: 5
or try venturi vaccum pump, if u have a source of compressed air , cheap and reliable.


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