Positive displacement pump

[Rob821]

Does anybody know of any manufactures of positive displacement water pumps capable of around 2-250m^3/hr with a maximum output pressure of about 120psi.

The applications may involve water that has particles upto 10mm in diameter.

 

[bimr]

The ability to hanlde the particle will be significant in the selection of the pump.

To pump the particles, you will probably have to go to a high-pressure piston diaphragm pump like the GEHO that is normally used for pumping slurries.

http://weirminerals.nl/weirweb/minerals/home.nsf/luProducts/10_Geho_ZPM?OpenDocument&view=ind

Is there any possiblity to remove the solids?

 

[micalbrch]

Weir Minerals is a good advice but their pumps are way too big and much too expensive because they are rated for 400 psi minimum. My guess is around 200 k$ for such a pump. The problem is that 120 psi is not really a high pressure but 250 m³/h is a rather high flow for a PD pump. 10 mm particles can be a challenge but more important is the density of the solids and the solids concentration. Why do you think that a centrifugal pump cannot do that, Rob821?

 

[stanier]

Geho pumps handle such solids with tirple action diaphragm pumps.

What do you mean by "too expensive"? If you need such a pump to dewater a mine to maintain production and keep the workforce safe and it has to be reliable then why is such a pump "too expensive"?

Comments such as this engender a belief that any engineer should not invest in a quality product. That the dollar is an engineering criteria. If all the more competent engineers in the world believed this the likes of Weir, Sulzer, KSB, Toroshima, Mokveld, Noreva and countless other good quality companies would go out of business. Any fool can by a cheap!

It will cost far less than a series of centrifugal pumps where the risk of failure is far higher because of multiple components.

"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.

http://waterhammer.hopout.com.au/

 

[SNORGY]

I question the PD pump as well. This sounds like a slurry pump application to me. Maybe two Galighers in series?

 

[micalbrch]

Stanier: The OP is an automotive engineer. So, I assume that he probably does not work in mining. Mine dewatering pumps usually require a much higher pressure than just 120 psi. And last but not least I gave him a price estimate for a quadruple acting piston diaphragm pump (GEHO will not do 120 psi with a triplex pump) so that he knows what I mean with "too expensive". I'm still sure that a PD pump is not the best choice unless there are parameters we do not know yet.

 

[bimr]

Plunger pumps may be an option. Komline makes a plunger PD pump that can handle the pressure and solids, but you would need 2 of the pumps to handle the large flow that you requested.

http://www.komline.com/docs/ks_plunger_pump.html

 

[Rob821]

The flow rates the critical item and it needs to be relatively accurate throughout the range I previously mentioned. It's possible we could filter the particles but currently we don't.

 

[TenPenny]

You mean you want a flow rate from 2 m3/h to 250 m3/h?

You want it controllable and fairly accurate?

That's a huge range.

 

[stanier]

Perhaps a series of progressive cavity pumps in parallel with VSD drives. They will handle the solids and the flow range that I assume is 200-250m3/hr.

Centrifugal pumps could well handle this application but there is insufficient information provided.

"Sharing knowledge is the way to immortality"
His Holiness the Dalai Lama.

http://waterhammer.hopout.com.au/

 

[bimr]

Would you please provide information on the application?

Do you have an existing system? What type of pump are you currently using.

Since the solids don't appear to be an issue, the best pump for the application is the vertical turbine pump.