Pump for dredge

[Jwilson534]

Ok...so I Wantried to know what the difference between a 100 gpm water/trash pump vs. a 100 gpm centrifugal pumps is? Only thing I can see is the head pressure is lower on the water/trash pump. I think it said you need pressure for the venturi to work?

 

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[russau]

Yes , Hi pressure is the driving force for dredging. the trash pumps are for washing material in high bankers and such.

 

[N-Lionberger]

Also trash pumps are often super heavy.

 

[Hoser John]

Dredge pumps have cast in hose bibs for a blaster nozzle which is absolutely mandatory to any dredge operation. John

 

[Lynx equipment]

Yes the volume is the same but a centrafugal pump has more pressure / flow. The biggest difference is in the impeller .

 

[jsurddy]

They’re both centrifugal pumps. The clearances between the impeller and housing are larger inside a trash pump. Also the impeller and housing are different designs between the two. Dredge pumps have tight clearances so they can build a lot of pressure without it bleeding off and recirculating inside the pump housing. To use a trash pump you will need to make the Venturi jet larger for better flow at lower pressure.