500 Wsg (20 inch) Sand Dredging Pump and Gravel Dredger Pump

• Customization: Available
• Type: Cutter Suction Dredger
• Power Type: Diesel
• Model NO.: 500WSG
• Cyclone Type: Hydrocyclone
• Slot Type: CTD
• Customized: Customized
• Condition: New
• Transport Package: Packed with Wooden Box or as Customer′s Request
• Specification: CE, ISO, SGS
• Trademark: Naipu
• Origin: Shijiazhuang, China
• HS Code: 8413701090
• Production Capacity: 5000 Set Per Month

Product Description

 500 WSG (20 inch) Sand Dredging Pump and Gravel Dredger Pump

Basic Information:

Name: NP-WS Dredging Gravel Pump
Pump Type: Centrifugal
Drvie Type: DCZ
Power: Motor / Diesel
Discharge Size: 100-1000mm
Capacity: 180-25000(m³/h)
Head: 25-76(m)

Application and Feature

Naipu® NP-WS dredging pump is 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 and so on .It throughout meets requirements of the dredge to dredging pumps .The pump mainly consists of the pump head , gearbox specifically for the dredging pump ,high elastic coupling and supervisor system of the driving device for the dredge.

Typical Applications---

Suction Hopper Dredging
Constructional Material
Sand gravel processing
Barge Loading
Sand Reclamation

NP-WS Dredging  PUMP PERFORMANCE PARAMETERS
 

type	Capacity (M3/H)	Head (M)	Speed (r/min)	Efficiency(%)	Inlet Dia (mm)	Outlet dia.   (mm)	NPSHR (M)		Max dia of flowed particle		Weight(T)
									five	three
100 WS	180-250	25-45	1000-1400	50-58	150	100		<3.5	50	82	0.5
150WS	250-550	20-40	1200-1400	58-60	200	150		<4	76	127	1.1
150WSG	350-700	40-65	800-980	68-71	200	150		<3.5	84	140	1.9
200WS	350-700	20-45	700-980	60-65	250	200		<4.5	105	178	2.3
200WSG	550-1000	40-65	700-850	70-72	250	200		<4	108	180	3.2
250WS	700-1100	20-45	500-750	65-70	300	250		<4	132	220	4.5
250WSG	900-1500	40-60	500-650	70-74	350	250		<4.5	86	144	4.6
300WS	1100-1800	20-40	400-600	65-68	350	300		<4.5	144	241	5.5
300WSG	1500-2200	30-65	400-550	74-78	450	300		<4	144	241	8.0
350WSG	2000-3000	40-65	400-550	74-78	450	350		<4	147	245	8.8
450WSG	3000-4000	35-67	350-500	76-80	600	450		<4.5	125	254	12
500WSG	4000-5500	40-65	350-450	78-80	650	500		<4.8	150	250	17
600WSG	5000-9000	55-80	320-400	81-85	650	600		<6	160	220	35
700WSG	8000-12000	60-85	280-380	83-85	750	700		<6	180	280	50
800WSG	10000-15000	50-70	260-360	79-80	850	800		<6	200	300	58
900WSG	120000-19000	50-75	280-330	83-85	950	900		<6	210	320	85
1000WSG	16000-25000	23-76	180-290	85-87	1100	1000		<6	230	350	126

Sand Dredge Pump Feature:
1. Dredge pump suitable for dredging ship:

The structure of 200WS-500WS type pumps are single-casing, single-stage, single-suction, cantilever and horizontal. According to the connection with the gear box, two structures can be offered: Self-carrying bracket and pump-box assembly. The lubrication for the bracket is grease or thin oil.
The structure of 600WSG-1000WSG 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. Easy to Disassembly and Installation, Convenient Maintenance:

WSG 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 parts 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.

3. Good Performance on NPSH:

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

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.

5. Reliable Shaft Sealing Without Leakage:

The shaft of 200-500WSG dredging pump uses the mechanical sealing or stuffing sealing or mechanical-stuffing compound sealing.
The shaft of 600-1000 WSG dredging pump adopts spiral sleeve L (shape) rubber sealing device that consists of three L sealing ring and one special thread shaft sleeve
Possible Faults And Removal

Faults	Reason	Removal
Pump fails to discharge any liquid	Air leaking into suction or gland Incorrect direction of pump rotation & impeller worn Suction pipe blocked	Sealed leakage Check direction of rotation and replacing impeller  Removal blockage
Shaft power consumption is excessive	Gland excessively tightened against packing rings Rotating component rubbing on a stationary part Bearing worn Drive belt tension too tight  Flow rate too large Pump speed and ratio too high Misalignment or unparallel of drive shaft and pump shaft	Loosen gland bolts Removal the rubbed part Replace the bearing Adjusting belt Modifying the pump duty and speed Adjusting drive and pump shaft
Bearing is over heating	Lubricants to much or less Containing impurity in the lubricant  Bearing worn	Lubricant as requirement Replace new lubricant Replace new bearing
Bearing has short time	Misalignment or unparallel of drive and pump shaft Shaft bent Impeller unbalanced due to wear Foreign object entered into the bearing or insufficient lubrication Incorrect procedure followed in fitting bearing	Adjusting drive and pump shaft Replacing shaft Removal rubbing and replacing new impeller Clean the bearing  Replacing or refitting the bearing
Excessive leakage from stuffing box	Packing rings excessive worn Shaft sleeve worn Dirty sealing water	Replace new packing rings Replace shaft sleeve. Change clean sealing water
Pump vibrates Or is noisy	Bearing worn  Impeller unbalanced Air entered into suction pipe or blocked Flow rate no-uniform and pump not primed	Replace by new bearing  Replace by new impeller Discharge air and remove block Improve on the pump feeding.

 
   

 

 

Company Profile

Company Profile

Naipu Pump is a professional global manufacturer of industrial pumps with more than 30 years production experience. Mainly produces various types of slurry pumps, sewage pumps, sump pumps, high chromium alloy accessories and various OEM and ODM production.Already passed the quality certification ISO9001, environmental certification ISO14001, and health Certification ISO45001. The company covers an area of more than 60,000 square meters, has 150 skilled workers, 50 professional and technical service personnel, and its products are sold all over the world. The annual output is 8,000 tons of accessories, 8,000 pumps, and annual sales of 20 million US dollars.

After years of sustainable development, Naipu has gradually upgraded to an environmentally friendly factory, with environmentally friendly resin sand machine modeling, high-efficiency casting electric furnace, heat treatment, and rough sand cleaning system. Every molding has undergone strict inspection to ensure the full brushing of the protective coating, which is the prerequisite to ensure the production of qualified castings.After passing the environmental and health certification, the workers' working environment has been improved.

Our spare parts inventory is very sufficient to ensure that each customer can replace the spare parts in the first time, and will receive sufficient size inspection and packaging before shipment.

Our Products are suitable for all slurry pumping applications - chemical, mineral processing, power generation and general industry.


NaiPu Main products

1. NAH , HH L Horizontal Slurry Pump
2. SP Vertical sump pump
3. ZJQ Submersible slurry pump
4. G Horizontal sand gravel pump
5. ZJQ Submersible sand pump
6. WS Dredging pump
7. AF Vertical Froth Pump
8 .AHF Horizontal Froth Pump
9. TL(R) Desulphurization Pump
10.Clean Water Pump
11. OEM Casting machinery wear parts

NHA series	L(R) ,M	HH	SP(R)	G	AF Series
1.5/1B-NAH(R)	20A-L	1.5/1 C-HH	40PV-SP(R)	6/4D-G	2QV-AF
2/1.5B-NAH(R)	50B-L(R)	3/2D-HH	65QV-SP(R)	8/6E-G	3QV-AF
3/2C-NAH(R)	75C-L	4/3E-HH	100RV-SP(R)	10/8F-G	6SV-AF
4/3C-NAH(R)	100 D-L	4/3X-HH	150SV-SP(R)	10/8S-G	8SV-AF
6/4D-NAH(R)	150E-L	6/4F-HH	200SV-SP	12/10G-G	2AHF
6/4E-NAH(R)	300S-L	6/4X-HH	250TV-SP	14/12G-G	3AHF
8/6E-NAH(R)	10/8 R-M	6S-H		14/12T-G	4AHF
8/6R-NAH(R)	10/8 E-M	8/6S-H		16/14 G-G	6AHF
10/8F-NAH(R)	12/10F-M	8/6X-H		16/14TU-GH
10/8X-NAH(R)		6S-HP		16/14H-GH
12/10ST-NAH(R)		8/6S-HP		18/16G-G
14/12ST-NAH(R)		8/6X-HP		18/16 TU-GH
16/14TU-NAH(R)
20/18G(TU)-NAH(R)

 

Slurry Pump Spare Parts

Main Spare Parts

Impeller, Volute Liner, Casing, ThroatBush, Frame Plate Liner Insert, Cover Plate, Frame Plate, Pump Liner Expeller, Expeller Ring,Stuffing Box, Expeller, Pump Shaft, shaft sleeve, Shaft Spacer, Bearing Assembly, Base, Stuffing Box, Gland Assembly, Bearing Housing,Lantern Ring, pump discharge pipe, flange, and so on. 

Materials and Durability
Wear-Resistant Materials: Components like impellers, liners, and throat bushes are often made from high-chrome alloys, rubber, or ceramics to withstand abrasive and corrosive conditions.

Customizable Designs: Many parts can be customized based on specific operating conditions or customer requirements
 

OEM Service


Naipu Pump is able to process whatever pump parts and wear parts customers require. The increasing development technology of reverse engineering has further enabled the company to contra-derive the shape of a sample offered by clients and, with the help of the latest 3D imaging technology to scan the pump parts, Naipu Pump can acquire accurate drawings (based on aluminum,iron and wood model patterns) to ensure that the company's replacement parts fit 100% onto customers' pumps.
Naipu Pump  understands the process and demands of the mining industry and can offer comprehensive 
services tailored to customers' needs.
The material can be high chrome alloy Cr27%,Cr28%  Cr30% Cr35% , A51, A61, A49,A07,C55, CD4MCU, Nature Rubber ,Stainless steel ss304 ss316 ss904, Alloy20 , Hastelloy and etc.

Application:  

 Mining and Mineral Processing: Handling abrasive slurries in coal, gold, copper, and iron ore mining.
Dredging and Sand Extraction: Used in river, lake, and sea dredging operations.
Power Plants: Desulphurization and ash handling systems.
Chemical Industry: Pumping corrosive and abrasive fluids.
Wastewater Treatment: Handling sludge and wastewater.
 

WorkShop

Shijiazhuang Naipu Pump Co., Ltd is a vertically integrated manufacturer with its own foundry workshop, machining workshop, and assembly workshop. This in-house capability allows Naipu to maintain strict quality control, reduce production lead times, and offer cost-effective solutions to clients.  





Advanced Test Equipment

To ensure the products quality , each Slurry Pump and Wear parts will be inspected strictly before delivery.


 

Why Choose Naipu?

1. Vertical Integration: Full control over production ensures high quality and cost efficiency.

2. 30 Years of Experience: Proven expertise in slurry pump manufacturing.

3. Global Reach: Trusted by clients in mining, dredging, power plants, and chemical industries worldwide.

4. Technical Support: Professional after-sales service and technical assistance.

Shijiazhuang Naipu Pump Co., Ltd is committed to delivering high-quality, cost-effective pumping solutions tailored to your needs!
 

Welcome to Contact Me

ShiJiaZhuang NaiPu Pump Co., Ltd
Contact person: Kitty Liu
Mobile: [phone]
 
Shijiazhuang, Headquarters
Add.: No. 368, Xinshi North Road, Shijiazhuang, Hebei Province, China

 

 

Welcome to contact us 
 

Shijiazhuang Naipu Pump Co., Ltd

Contact person: Kitty Liu 

 

Naipu is looking for partner around the world to distribute slurry pumps , gravel sand pumps , dredging pumps.
Welcome to contact me for  slurry pump price list and catalogue.