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 inspeiction facilities.
They are designed for the handling highly abrasive,high density slurries in the metallurgical ,mining,coal,power,building mateiral and other industrial department etc.The pumps of this type may be installed in multistage series.
Type ZJ pumps are cantilevered ,horizontal ,centrifugal metal slurry pumps.
1.Double layers' structure,the inner wet ends contain impeller,volute liner,front liner,back liner,the material is high-chrome alloy ,HRC>58.The outer layer are frame plate,cover plate ,whose material is ductile iron.They bear the internal pressure.
2.The forms of seal are packing seal ,expeller seal,mechanical seal.
3.The form of bearings is grease lubrication or oil lubrication .
4.Absolutely interchangeable with AH series slurry pump spares.
Discharge Diameters - 25 to 350 mm (1" to 14")
Flows - to 3060 m3/h
Total Head up to 97 m
High density slurry transfer;
Thickener underflow recirculation;
Cyanide processing etc.
Long wear life
Excellent suction performance
Ease of maintenance
Large sphere passage
Naipu is more than a slurry pump manufacturer. We help customers select the type, size and operating speed of pumps that will perform at the Lowest Cost of Ownership.
Construction Drawing :
Pump Performance Curve
Pump Performance Parameters
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.
5.Decrease the height of the transport or reduce the resistance.
6.Unlock the inlet valve
7.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.Abnormalsound in thepump, and nowater out
1.The resistance of the inlet pipe is too big.
2.The height of the suction is too high.
4.there is air in the inlet
5.The temperature of the liquid is too high
1.Clear the suction pipe and sluice valve.
2.Lower the height of the suction
3.Adjust the water valve and let the pump operate in the defined limits.
4.Block the leakage.
5.Lowering the liquid temperature.
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
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.
1.Open the cooling water
2.Adjust the oil quantity
3.Clear the shaft,change oil
4.According to the inlet pressure,adjust the direction of the thrust bearing.