Vacuum Pump.

Potatoes last one shot, so build reusable! Discuss ammo designs and ideas. Tough to find cannon part or questions? Ask here!
warhead052
Staff Sergeant 3
Staff Sergeant 3
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm

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?
User avatar
POLAND_SPUD
Captain
Captain
Posts: 5402
Joined: Sat Oct 13, 2007 4:43 pm
Been thanked: 1 time

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'

Image
Children are the future

unless we stop them now
warhead052
Staff Sergeant 3
Staff Sergeant 3
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm

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...
User avatar
mattyzip77
Sergeant 3
Sergeant 3
United States of America
Posts: 1249
Joined: Tue Jun 28, 2011 12:22 pm
Location: Taxachusetts

Donating Members

Fri Aug 05, 2011 7:54 pm

Hmmmmmmmmmmmmmmmmmmmmmmmmmm, it says that itis a pump???? wouldnt that be false advertising????
Go Bruins!!!!
jsefcik
Sergeant 2
Sergeant 2
Posts: 1138
Joined: Tue Jun 07, 2011 10:11 am

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
User avatar
MrCrowley
Moderator
Moderator
Posts: 10078
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Been thanked: 3 times

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.
User avatar
jimmy101
Sergeant Major 2
Sergeant Major 2
United States of America
Posts: 3206
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Has thanked: 6 times
Been thanked: 18 times
Contact:

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.
Image
warhead052
Staff Sergeant 3
Staff Sergeant 3
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm

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.
User avatar
saefroch
Staff Sergeant 2
Staff Sergeant 2
Posts: 1679
Joined: Mon Jun 08, 2009 8:47 am
Location: U.S.A.- See Map

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.
Post Reply