Dredging questions

[b.jmining530]

How many gph do you need to run a 2 inch dredge

 

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[Bejay]

It is not really about volume it is all about pressure and hose sizes.

Bejay

 

[b.jmining530]

1.25 to a 2 inch

 

[vobmaker]

How many gph do you need to run a 2 inch dredge

You can probably find what info you need at the Keene mfg. website.

If I were to guess, I would say about 120 gpm.

 

[Timberdoodle]

If you are running a log jet or suction nozzle you will need a pump capable of delivering 60-80gpm @25-30psi. The best way to determine if a pump is capable is to look at the pump charts because the differences in pump capability at pressure plays a heavy role. A Keene P90 combo can produce this while it's max rating is 100gpm, but a clear water pump may need to be rated in the 150gpm maximum range to be able to deliver this volume at this pressure.
In a centrifugal pump, the pressure and volume are directly related. You cant get to a pressure level without sufficient volume capability.
There are more efficient jets that require less volume or less pressure to produce the same suction, but in general a simple log jet or suction nozzle will fall in or close to this range.

 

[omnicron]

You could get a Harbor Freight 2" clear water pump and run a 2.5" with no problem, 2" dredge with room to spare. I ran that pump with a 2.5 a few years back and it worked great. I know there is a dredge builder on craigslist that uses that same pump/motor to run a 4" dredge...how well it works for that, I don't know.

 

[Kruzman]

I run my 2in with HF 1in clear water pump, jet is a 12 jet pvc couple. Pump must be run wide, and hose is 10 Ft. If I sized up the pump to a 1.5 or 2in would be better.

 

[b.jmining530]

Thanks every body for the info me and my buddy are thinking about trying to make a dredge set up for a trip out of state to Oregon