Piston pump

[xtra]

Hi guys,

I'm desperately looking for a specific pump, but can't seem to find it anywhere. That's why I'm asking here:

I'm looking for a piston pump with following specifications:
- 444 GPM = 100m3/h
- minimum 50 bar
- Can deal with solids up to 100 mm / 4 inches across.

So far I only found the putzmeister HSP1080 which is astonishingly long.
Another type of pump that will do the job would be all right too.

Thanks for thinking with me.

 

[micalbrch]

There are others like GEHO, ABEL, SAXLUND who make the same kind of pump Putzmeister does but such a pump is bloody expensive and the dimensions are the same with other manufacturers, too. You must expect something around 500k$. The problem for your application are the solids. 100 mm is nothing a typical piston pump can handle but 100 m³/h and 50 bar is easy for these pumps. Can you describe the fluid a bit better? What solids concentration and can't you eliminate the big particles? By the way: Is it up to 100 mm in diameter?

 

[xtra]

thanks for you reply!

It is up to 100 mm in diameter.

The fluid which will be pumped is dredging fluid. It is scraped of the bottom of small lakes through a grid of 100 mm. Then an Archimedes screw brings the fluid to the piston pump. Suppose I make the grid 50 mm. Will there be other, maybe smaller (in size), solutions?

 

[FACS]

Here is the problem with this:

Piston pumps rely on Check valves. One check in -- and one check out.

Check Valves do not pass particles well. When the solids get caught in the check valve seat, they do not seal. When they do not seal, then they do not work. When they do not work, they can not be used.

Don't pump solids when involving check valves.

Instead, look into a massively expensive progressive cavity pump. They handle solids well.

Charlie

http://www.facsco.com

 

[micalbrch]

xtra: Check mud pumps. National Oilwell and Wirth (now Aker Solutions) are probably the most known manufacturers. Ask what particles they can handle but I guess it will be less than 20 mm. A centrifugal pump would be the better choice but the pressure is very high. Why? Is there a static discharge head which causes that?

Progressive cavity pumps handle solids well, too. But not against 50 bar and only as long as these solids do not wear out the stator and that can happen pretty fast at high pressure.

 

[MartinLe]

You might want to look at the KOV range of pumps from putzmeister, their ball valves are supposed to handle solids quite well.
50 bar is a lot. If not for the high pressure, could mammoth pumps be used for such slurries?

 

[xtra]

Thank you all for your replies.
The reason for this high pressure is that I want the fluid to be pump over great distances. I've contacted the suppliers you mentioned and await their replies with interest.

 

[LittleInch]

I would be interested to see what you come up with, but am more interested in why you want to send 4" rocks a long distance...

I think you need to have a good look at the process and overall system to reduce particle size (a crusher?) or remove the large items altogether. Not many people want to do what you're trying to do so not many vendors will go that far. Slurry on the other hand is a well known and supported industry, but 100mm sized bits at that sort of pressure is not common.

good luck

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

 

[DubMac]

Imagine it is rocks or concrete? As Little Inch says, it might be easier to rethink the process; maybe separate the chunks out and add in after pumping, or just crush.

 

[Artisi]

How do you intend to keep the 4" solids in suspension over a "long distance"?
What diameter is the pipe line?
What is the concentration of the pumped material?
I think you have many questions to answer before even looking at the pump.


It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)