Thursday, July 10, 2008

Re: [papercreters] Peristaltic pump

I'd be careful on this one.


A peristaltic pump would easily move shredded paper, but I had a few concerns about the real deal concrete pumps.

1. Cost of repairs - these pumps break frequently due to neglect and misuse. If you are not experienced with fixing vehicles and big pumps this could be very expensive.

2. How will you load the paper from your mixer into the pumps intake tray? The mayco C30D stucco pump and most likely this peristaltic pump have a rather high tray that is normally filled with a front loader. A trash pump on the other hand has a intake hose that can easily be connected to placed into a papercrete mixer.

3. Power - A peristaltic pump will provide a lot more power than you need. Not a bad thing, but this is scary large scale equipment. If you have experience with this kind of gear no big deal. If you don't, maybe you have a friend that can get you comfortable so nobody gets hurt.

On Jul 10, 2008, at 10:13 AM, Dave S. wrote:

Thanks ElfN,
 
I saw a couple online videos & have looked at the background info on the pumps. It looks pretty versatile for moving & placing papercrete, lightweight concrete, materials that mess with contact style pumps. I keep imagining a sort of lego block papercrete (icf – insulating concrete form) with higher strength concrete pour inside. It's a code approved method here to strengthen cinder block walls by filling cores, doesn't require quite the leap of faith on their part to grant a variance for using papercrete if they even care at all. The pump looks like it would be very useful to fill cores more easily. I don't think I'd do that well hoisting buckets to fill the cores.
 
I'm underway to fabricate a tow mixer & will probably give the 25 gallon laundry sink / disposer scheme a try for a smaller batch 'tool'. I don't know if the disposer will need a boost to create flow or will spin enough volume on its own.
 
The used peristaltic will end up at about ½ the cost of new, perhaps a bit under that & should be able to pump about 1 cu ft of mix every minute. I don't know what 'issues' a used pump may have & if it is simpler to go with the new, electric driven one. The gas engine driven rig I saw on one web-site was about 10k, too much for my experimental budget.
 
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From: papercreters@yahoogroups.com [mailto:papercreters@yahoogroups.com] On Behalf Of ElfNori
Sent: Thursday, July 10, 2008 9:37 AM
To: papercreters@yahoogroups.com
Subject: Re: [papercreters] Peristaltic pump
 
Dave, have you seen a peristaltic pump in action?  I wouldn't recommend it for breaking down paper, but I would love to have one for getting slurry to a form.
 
ElfN
----- Original Message -----
From: Dave S.
 
I came across an older Delasco peristaltic pump on ebay and would appreciate hearing some thoughts on how helpful it would be in handling materials.
 
The seller has 2, the smaller one appears to be capable of 2-10 gallons per minute. Asking price is $950 plus $300 freight delivery from NH to MN. He says the whole assembly, gear box, pump & motor weighs 300-350#.
 
After the great discussion of grinder pumps & exploring the "reckless experimentation" site a lot of things are starting to look like papercrete tooling. The local building supply has a 1hp GE disposer & a deep, laundry sink that looks like a 25 gallon mixer wanting to happen for about $200.
 
A new, 1 1/2hp, 1-8gpm pump from www.eccentricpumps.com is $3200 plus shipping.
 
Any experience & insights appreciated.


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at 11:47 AM