|
Posted by Jon Elson on February 7, 2008, 7:11 pm
Please log in for more thread options
Jon wrote:
> A discussion came up here at work today (again) about waterjets in general
> and pumps specifically.
> We're curious as to what fails in the older hydraulic pumps.
>
> Also, cranshaft pumps are gaining popularity. Here's a photo of one
> http://www.flowcorp.com/waterjet-resources.cfm?id=340
>
> Does anyone have any idea of the bore/stroke of one of these units?
>
>
The bore is fairly small, the stroke is maybe about 1/4 - 1/2" I
think. What wears out are the seals, and then you replace the
entire pumping assembly. They showed us the kit, it was a bunch
of green things that looked like plastic, but may have been a
ceramic material. I think what we were looking at was the
cylinder, and the piston is pre-fitted inside. It is basically
a drop-in cartridge, and they told us it usually took longer to
get stuff cleared away from the back of the machine than to
actually change the cartridges. Most of their pumps have 3
cylinders, so the kit would have 3 cartridges. I don't recall
the price of the kit, but it was under $1000, and you were
supposed to get at least a few hundred hours of actual cutting
per set, varying somewhat depending on pressure and flow rate.
Jon
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
> and pumps specifically.
> We're curious as to what fails in the older hydraulic pumps.
>
> Also, cranshaft pumps are gaining popularity. Here's a photo of one
> http://www.flowcorp.com/waterjet-resources.cfm?id=340
>
> Does anyone have any idea of the bore/stroke of one of these units?
>
>