Very small pump or equivilent for causticchemicals
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Posts: 46,084
So make one. Not a major deal. I'll bet I can cobble something together
from the hardware store that will do the job for under $15, not
including a motor.
> These 'roller pumps' would be an excellent choice. Also called
> paristaltic pumps.
>
> Being medical/lab type pumps makes 'em expensive - but check for
> surplus on eBay f'rinstance
from the hardware store that will do the job for under $15, not
including a motor.
> These 'roller pumps' would be an excellent choice. Also called
> paristaltic pumps.
>
> Being medical/lab type pumps makes 'em expensive - but check for
> surplus on eBay f'rinstance
Comments
McMaster-Carr http://www.mcmaster.com
jim
http://www.geocities.com/jimforkin2003/
Original Message
From: Bill Boyer [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=W2MdbbmVi6YfL1JmqMYEnwyxX9-uAl7I80ZS-wjAIA9z8rVflSTw11V4Q2olE_WGK5av3PHgNcW2RA]daweasel@s...[/url
Sent: Thursday, June 12, 2003 2:43 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Very small pump or equivilent for caustic
chemicals
So make one. Not a major deal. I'll bet I can cobble something together
from the hardware store that will do the job for under $15, not
including a motor.
> These 'roller pumps' would be an excellent choice. Also called
> paristaltic pumps.
>
> Being medical/lab type pumps makes 'em expensive - but check for
> surplus on eBay f'rinstance
To UNSUBSCRIBE, just send mail to:
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for the exact job you want to accomplish. There is no way that the pumps
we have cost a 100$ because they Smile. But if it gets the job done then
stick with it right? Anyway check pool stores, because ours is pretty
small I don't know the exact specs but it doesn't pump all that much
because it is constantly running and trying to keep up with the demand.
-Mike
Original Message
From: Jim Forkin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=SoO9O3HABgee9miprBorqpj044U0VTSUDcdqagY7zbDUcyLxBoynHfnOXAkqO0FLfDI_O27nivKU]jjf@p...[/url
Sent: Thursday, June 12, 2003 3:07 PM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Very small pump or equivilent for caustic
chemicals
A precision fixed-flow peristaltic pump #43045K31, $99.69 at
McMaster-Carr http://www.mcmaster.com
jim
http://www.geocities.com/jimforkin2003/
Original Message
From: Bill Boyer [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=9xzWEme4ULCFrzxUmfeMOUFMYdZk-yy2VnU4cuZVXzvRpzJX6_ygkcW5zBAVnKnAtC-NOXhTqEYAl70]daweasel@s...[/url
Sent: Thursday, June 12, 2003 2:43 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Very small pump or equivilent for caustic
chemicals
So make one. Not a major deal. I'll bet I can cobble something together
from the hardware store that will do the job for under $15, not
including a motor.
> These 'roller pumps' would be an excellent choice. Also called
> paristaltic pumps.
>
> Being medical/lab type pumps makes 'em expensive - but check for
> surplus on eBay f'rinstance
To UNSUBSCRIBE, just send mail to:
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around [noparse]:D[/noparse]
I too work in pools, I'm one of the engineering staff that keep all the
machinery running and do the chemistry for 11 pools. We use LMI pumps, some
of which are quite small (for hot tubs). They're still way over capacity
when feeding a 5 gallon bucket though.
I haven't found any peristaltic pumps that would be small enough (physical
size - this has to be portable). I'm looking into the pressurized container
idea now. It dawned on me that the gravity feed method would result in less
and less flow as the liquid level drops - less head=less flow. Though I'm
also thinking of going manual and just using a couple of small valves.
Meridian 59 is back! Sacred Haven - server 200
www.skotos.net
Original Message
From: "Mike Dillon" <laxboy687@e...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, June 13, 2003 12:05 PM
Subject: RE: [noparse][[/noparse]basicstamps] Very small pump or equivilent for caustic
chemicals
> Hi I work at a pool as a lifeguard and we use these peristaltic pumps
> for the exact job you want to accomplish. There is no way that the pumps
> we have cost a 100$ because they Smile. But if it gets the job done then
> stick with it right? Anyway check pool stores, because ours is pretty
> small I don't know the exact specs but it doesn't pump all that much
> because it is constantly running and trying to keep up with the demand.
>
> -Mike
>
>
Original Message
> From: Jim Forkin [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=rjQLlXQXZF2K0lI5XyMQRSFJo4KybmlgRzsJbyqqNjW4mGTcULjRRbpEtPKJe5w0153oNTl87iw]jjf@p...[/url
> Sent: Thursday, June 12, 2003 3:07 PM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] Very small pump or equivilent for caustic
> chemicals
>
> A precision fixed-flow peristaltic pump #43045K31, $99.69 at
> McMaster-Carr http://www.mcmaster.com
>
> jim
> http://www.geocities.com/jimforkin2003/
>
>
>
Original Message
> From: Bill Boyer [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=83YSAuXoF59vIQSORdD6AIGkefdTmADCvfEUTs7rW_JgbKUFftdXy1hMQyOalbsEk4U-LBM6DhAR_A]daweasel@s...[/url
> Sent: Thursday, June 12, 2003 2:43 PM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Very small pump or equivilent for caustic
> chemicals
>
>
> So make one. Not a major deal. I'll bet I can cobble something together
> from the hardware store that will do the job for under $15, not
> including a motor.
>
> > These 'roller pumps' would be an excellent choice. Also called
> > paristaltic pumps.
> >
> > Being medical/lab type pumps makes 'em expensive - but check for
> > surplus on eBay f'rinstance
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
> and
> Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
> It dawned on me that the gravity feed method would result in less
> and less flow as the liquid level drops - less head=less flow
A Mariotte siphon has a reasonably constant head, as long
as the liquid level is above the bottom of the vent tube.
Head = vertical distance between vent outlet & liquid out-
let.
For small tubing valve output by closing the vent - Valve
sees only air.
||
XX - valve
___||____
| || |
|.......| - liquid level
| || |
| || |
| || |
| || |
| || |
| || | --> vent outlet
| |
| ==== -> outlet
|.......|
regards, Jack
>idea now. It dawned on me that the gravity feed method would result in less
>and less flow as the liquid level drops - less head=less flow. Though I'm
>also thinking of going manual and just using a couple of small valves.
You are correct in saying the more the liquid level drops, the less head
you have pushing the liquid out. That is why I used 4" PVC, an ounce or 2
doesn't create enough head to make a difference (in my case) but it did
when I was using 1" PVC. I also heated the cap and 'formed' it so there
was a slight taper towards the outlet (centered on the cap).
Hope you find something that works.
-John