Sea Sand Dredging Anti-Wear And Corrosion-Resistant Centrifugal
Sand Dredging Pump
Main Features
Wet-End Design
The unique segmented clamp ring on larger size units and solid on
smaller pumps, facilitates casing rotation to any angle, reducing
the need for costly high wearing bends. Minimal maintenance is
required.
1. Impeller – front and back shroud expulsion vanes reduce gland
pressure and intrusion of high concentrations of solids in the
gland area. Efficiency is maintained by minimizing suction side
recirculation. Specially designed and shaped impeller vanes allow
the handling of extraordinarily large particles. The unique casing
design and sealing vanes prevent abrasive solids intrusion at the
sealing faces.
2. Casing – The large, robust casing has been designed to reduce
internal velocities resulting in minimum efficiency loss and
improved casing wear life. The casing is made up of three
components to reduce maintenance time and costs associated with a
one piece design.
Impeller
The impeller generally has three vanes or five vanes and wide
application range.It is made of wear-resistant high chromium alloy
cast iron(hardness≥58HRC,impact toughness≥9J/cm2).The impeller is
fixed on the pump shaft with double thread,and the thread
tolerances are inspected according to the pitch diameter of
thread.Disassembly rings are installed at the rear of the shaft
sleeve to make maintenance eas
Volute casing
The volute casing is made of wear-resistant and
compression-resistant alloy(hardness≥56HRC,impact
toughness≥8J/cm2).Advanced smelting technology combined with
casting process and heat treatment process guarantees smooth
casting surfaces and reliable internal qualiyt.
The bulge test will be carried out after molding,and the test
pressure is 2 times of the discharge pressure of the pump.If there
no leakage after 20 minutes,strength and tightness,strength and
tightness pressure test reports can be issued.
Liner plate
The liner plates are made of wear-resistant high chromium alloy
cast iron(hardness≥56HRC,impact toughness≥8J/cm2).
| Metal Pumps Material |
| No | Part | Material | No | Part | Material |
| 1 | Base | Cast Iron | 1 | Base | Cast Iron |
| 2 | Shaft | 4140 High Tensile Steel* | 2 | Shaft | 4140 High Tensile Steel* |
| 3 | Bearing Assembly | Timken (Cast Iron Body) | 3 | Bearing Assembly | Timken (Cast Iron Body) |
| 4 | Shaft Sleeve | 420 Stainless Steel | 4 | Shaft Sleeve | 420 Stainless Steel |
| 5 | Pump Casing | Cast Iron | 5 | Pump Casing | Cast Iron |
| 6 | Frame Plate Liner Insert | Rubber | 6 | Frame Plate Liner | 27% Chrome White Iron |
| 7 | Cover Plate Liner | Rubber | 7 | Volute Liner | 27% Chrome White Iron |
| 8 | Impeller | Rubber Coated High Tensile Steel | 8 | Impeller | 27% Chrome White Iron |
| 9 | Throat Bush | Rubber | 9 | Throat Bush | 27% Chrome White Iron |
| 10 | Cover Plate | Cast Iron | 10 | Joint Rings | Rubber |
| 11 | Stuffing Box | Cast Iron | 11 | Cover Plate | Cast Iron |
| 12 | Expeller | 27% Chrome White Iron | 12 | Stuffing Box | Cast Iron |
| 13 | Expeller Ring | Natural Rubber | 13 | Expeller | 27% Chrome White Iron |
| 14 | Bolts | Zinc Plated Steel | 14 | Expeller Ring | Natural Rubber |
| 15 | O-rings | Nitrile Rubber | 15 | Bolts | Zinc Plated Steel |
| 16 | Seals | Rubber | 16 | O-rings | Nitrile Rubber |
| 17 | Seals | Rubber | 17 | Seals | Rubber |
Application
1)To extract mud and sand for ships,river dredging and mining.
2)For long -distance transmission of big partical or strong
corrosive materials
that general slurry pump can't transport.
