2.1 Production Overview

WN dredge pump is a new type of sludge pump researched & manufactured by our company basing on International (Warman ) Gravel Pumps， aiming at rivers and seas out of repair. NM pump is a single-stage single suction cantilever horizontal centrifugal pump with advantages of light weight, good wear-resistant, super dredging performance, perfectly suited for the dredge on the whole construction,high multiple economy benefits, etc.. It throughout meets requirements of the dredge to dredging pumps.

2.2 Main Features

2.2.1 Structure suitable for dredging ship:

The structure of 200WN-500WN type pumps are single-casing, single-stage, single-suction, cantilever and horizontal. According to the connection with the pump head, two structures can be offered:self-carrying bracket and pump-box assembly/pump integrated with gearbox. The lubrication for thebracket is grease or thin oil.

The structure of600WN-1000WN type pumps are double-casing, single-stage, single suction, cantilever and horizontal. It has self-carrying bracket. Lubrication is forced thin oil lubricating. The double-casing
design can ensure the liner can work till it is worn out, and if the liner crack, water can not enter into the pump.

2.2.2 Easy to Disassembly and Installation, Convenient Maintenance:

WN type pump adopts front-disassembly structure in favor of easy disassembly and maintenance. Also it is equipped with special disassembly tools for each different part according to each part's features.
The standard trapezoidal quadruple thread is adopted to connect the impeller and shaft, which not only transmits strong torque but also is easy to disassembly.
 

2.2.3 Good Perfomance on NPSH:

The good NPSH performance of WN type pump ensures the strong suction ability as well as deeperdredging depth and denser dredging concentration.

2.2 4 Good Wear-resistant Performance, Long Service Time of Wet Parts:

Wet parts of this kind of dredging pump-impeller, liner and front & back liner plate are adapted anti-wear cast iron alloy whose hardness is more than 58HRC, who has both strong anti-attack feature and higher
resistance wear and resistance abrasion features. The hardness of our material that is researched and tested successully by us can research 70HRC.

2.2.5 Reliable Shaft Sealing Without Leakage:

The shaft of 200WN-500WN dredging pump uses the mechanical sealing or stuffing sealing or mechanical-stuffing compound sealing.

The shaft of 600WN-1000WN dredging pump adopts spiral sleeve L (shape) rubber sealing device that consists of three L sealing ring and one special thread shaft sleeve.

2.3 Advantages

2.3.1 Advanced hydraulic model, CAD 3D design, high eficiency and obvious energy-saving

2.3.2 Large dredging depth, high density of dredging mud, good NPSH and strong suction lift ability

2.3.3 Strong through-put. The pump can persistently discharge gravel, high plastic soil lump, etc.

2.3.4 The pump can be directly matched with either motor or diesel engine

2.3.5Wide application. It can be used in various kinds of soil quality. Generally, the pump is matched with an impeller with 3 or 5 pieces of vane. At the same time, the impellers can be provided with various
diameters and vane types to suit kinds of working condition.

2.3.6 Little hydraulic loss, high efficiency and low oil- consumption

2.3.7 Little volume, light weight

2.3.8 Steady operating, itte vibration, low noise

2.3.9 Simple & reliable construction, easily disassembly & assembly, convenient maintaince

2.3. 10 Reliable sealing without leakage

2.3.11 Long operating life of parts

2.3.12 Long operating life of parts
 

2.4Type Meaning

Ex:450WN

450: Pump exports in diameter(mm)

WN: Dredging pump

2.5 Selection chart

2.6 Performance Table