Low Abrasive Low Density High Chrome Centrifugal Slurry Pumps
Shijiazhuang Naipu Pump Co., Ltd is a slurry pump manufacturer of above 20 years' experience, inosculating design, development, manufacture, sales and services as a whole. The company manufactures its products using advanced technique based on well-built management and sales & service system. Product is guaranteed with various test and inspection facilities.
1. Type ZJD pumps are cantilevered, horizontal, centurifugal slurry pumps. They are suitable for
Delivering low abrasive, low density slurries for metallurgical, mining, coal and build material departments. The shaft seal can be both gland seal and centurifugal seal.
2. Type ZJD pumps are adopted high speed operating and so they have small volumes to save floor area.
3. The frame plates have changeable, wear-resistant, metal liners or rubber liners and the impellers are made of wear-resistant metal or rubber(Rubber for frame plates, impellers of pumps with discharge dia. Above 550mm). The discharge position by request may be rotated 8 different angles at intervals of 45 degrees for installation and application.
Typical Applications---
Chemical Process
Heavy Minerals
Plant Water Supply
Thickener Overflow
Paper and Pulp
Slag Granulation
NP-L Construction Drawing
NP-L Pump Performance Curve
Note:Approximate performance for clear water,to be used for primary selection only.
NP-L Pump Performance Parameters
Shaft Seals:
1.Packing seal.As one of the most commonly used seals for rotating shafts,the gland seals can come with low-flush or full flush arrangement which uses flushing water to prevent media from escaping the pump housing.This kind of seal is suitable for use in almost all pumping solutions.In situations where solids or high temperature might be encountered. aramid fiber is used as the packing material for the gland.For high abrasion conditions,a ceramic shaft sleeve is available.
2.Centrifugal Seal-Expeller
The combination of impeller and expeller creates the pressure needed to seal against leakage.Together with the gland seal or lip seal which is used as the shut-down seal,this type of seal can handle sealing requirements for applications where full-flush gland seal is impractical due to lack of water on the site,or sealing water is allowed to enter inside the pumping chamber to dilute the slurry.
3.Mechanical seal
Heavy duty pump utilizes a leak-proof mechanical seal design which allows easy installation and replacement.Other types of mechanical seal are among options to suit the slurry pump for various pumping applications.
We also utilize special ceramic and alloys of high strength and hardness on parts that are subjected to friction.Unique design and seamless fit between the mechanical seal and seal chamber provides excellent resistance to abrasion and shock that ensure its effectiveness under the toughest conditions.
Product Overview:
Possible Faults and Settlements
| Faults |
Reason |
Settlement |
| 1.Pump fails to discharge any water,The hand of pressure gauge beat violently |
1.Suction pipe don't have enough water.
2.Suction pipe blocked or the valve is locked. |
1. Inject enough water
2.unlock the inlet valve,clear the blocks
3.Exclude the air leakage |
| 2.The pump can't discharge water,the hand of vacuum meter beat heavily. |
1.The inlet valve is unlocked or silted up.
2.The resistance of suction pipe is too big or silted up.
3.The height of suction is too high. |
1.Unlock the valve or desilting
2.improve the design of suction pipe or desilt
3.Lower the height of the installation. |
| 3.The pump can't discharge water,pressure gauge shows heavy pressure. |
1.The resistance of the discharge pipe is too big.
2.The impeller blocked
3.The speed is slow. |
1.Check and adjust the outlet pipe.
2.Clear the impeller
3. Improve the speed. |
| 4.The pump doesn't rotate |
The volute is silted up by the blocks. |
Clear the blocks |
| 5.The capacity is not enough |
1.The blocks of the impeller or the inlet or outlet pipe.
2.The abrasion of the impeller is heavily.
3.The speed is low to normal
4.Pump is installed unreasonably or the leakage of the inlet pipe.
5.The transporting height is too high,the loss of the resistance of the inside pipe are too big.
6.The inlet valve not open enough or blocked
7.The packing seal leaks |
1.Clear the impeller or pipe.
2.Change the impeller
3.Adjust the speed
4.Install again or stop leaking.
- Decrease the height of the transport or reduce the resistance.
- Unlock the inlet valve
- Compress the packing tightly
|
| 6.The motor of the pump is overloaded |
1.The head of the pump exceeds the head of the working condition.
2.Not consider the slurry density when selecting the pump.
3.The packing press tightly |
1.Turn down the outlet valve,cut the impeller or lower the speed.
2.Select the motor again.
3.Adjust the the screw of the packing gland |
| 7.Abnormal sound in the pump, and no water out |
1.The resistance of the inlet pipe is too big.
2.The height of the suction is too high.
3.Cavitation occurred
- there is air in the inlet
- The temperature of the liquid is too high
|
- Clear the suction pipe and sluice valve.
- Lower the height of the suction
- Adjust the water valve and let the pump operate in the defined limits.
- Block the leakage.
- Lowering the liquid temperature.
|
| 8.pump vibrates |
1.pump cavitate
2.The block of the impeller single vane
3.The no concentricity between the pump shaft and motor shaft
4.Fasteners or foundation loose |
1.Adjust the water valve ,lower the height of the installation,reduce the resistance of the inlet.
2.Clear the impeller
3.Alignment again
4.Fasten the screw,and reinforce the foundation. |
| 9.Bearing is overheat |
1.lock the cooling water
2.lubrication is not good.
3.the lubrication oil is not clear
4.the wrong direction of the thrust bearing.
5.there is something wrong with the bearing. |
- Open the cooling water
- Adjust the oil quantity
- Clear the shaft,change oil
- According to the inlet pressure,adjust the direction of the thrust bearing.
- Change the bearing
|
| 10.Packing short life |
The material of packing is not good |
Change the packing |
| 11.pump leak oil |
1.High oil level
2.The rubber parts invalid
3.Assembly problem |
1.Lower the oil level
2.Change rubber spares
3.Adjust the assembly
|
| 12 Pump head leaking |
1.The rubber parts not press well |
Assembly again or press tightly |
Contact Us
Shijiazhuang Naipu Pump Co.,Ltd
Karen Tan
Audited Supplier 
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