CNSME PUMP's Customized Pump Parts
The customized pump parts is recommended by Shijiazhuang Minerals Equipment Co., Ltd. for 2 keys: 1) It is manufactured based on fine materials which are supplied by our reliable partners, fantastic design which is made by our own team of talents, and excellent craftsmanship which is a result of talents and skills; 2) It is applied in specific fields where it is in the lead, which can be attributed to our precise positioning. In the future, it will continue playing an important role in the market, on a basis of our constant investment and strong R&D capability.
In the competitive market, CNSME PUMP products excel others in sales for years. The customer prefers to purchase high-quality products even though it costs more. Our products have proved to be at the top of the list regarding its stable performance and long-term service life. It can be seen from the high repurchase rate of the product and feedback from the market. It wins many praises, and its manufacturing still complies with higher standards.
Customers will enjoy incredible privileges listed at CNSME and in-depth consultation leads to more favorable discounts for customized pump parts.
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During operation, there are four types of common failures of slurry pumps: corrosion and abrasion, mechanical failure, performance failure and shaft sealing failure. These four types of failures often affect each other.
For example, the corrosion and abrasion of the impeller will cause performance failure and mechanical failure, and the damage of the shaft seal will also cause performance failure and mechanical failure.
1. Bearings Overheated
A. Too much, too little or deterioration of lubricating grease/oil will cause the bearing to heat up, and the appropriate amount and quality of oil should be adjusted.
B. Check whether the pump -motor unit is concentric, adjust the pump and aglign it with the motor.
C. If the vibration is abnormal, check whether the rotor is balanced.
2. Reasons and solutions that may causenon output of slurry
A. There is still air in the suction pipe or pump, which should be filled with liquid to discharge the air.
B. The valves on the inlet and outlet pipeline are closed or the blind plate is not removed, then the valve should be opened and the blind plate removed.
C. The actual head is higher than the maximum head of the pump, a pump with higher head should be employed
D. The rotation direction of the impeller is wrong, so the rotation direction of the motor should be corrected.
E. The lifting height is too high, which should be lowered, and the pressure at the inlet should be increased.
F. The debris is blocked the pipe or the suction pipeline is small, the blockage should be removed and the pipe diameter should be enlarged.
G. The speed does not match, which should be adjusted to meet the requirements.
3. Reasons and solutions for insufficient flow and head
A. The impeller is damaged, replace it with a new impeller.
B. Too much damage to the sealing ring, replace the sealing ring.
C. The inlet and outlet valves are not fully opened, they should be fully opened.
D. The density of the medium does not meet the requirements of the pump, re-calculate it.
4. Reasons for serious seal leakage and solutions
A. Improper selection of sealing element materials, replace suitable elements.
B. Serious wear, replace the worn parts and adjust the spring pressure.
C. If the O-ring is damaged, replace the O-ring.
5. Reasons and solutions of motor overload
A. The pump and engine (output end of the motor or diesel engine) are not aligned, adjust the position so that the two are aligned.
B. The relative density of the medium becomes larger, change the operating conditions or replace the motor with suitable power.
C. Friction occurs in the rotating part, repair the friction part.
D. The resistance (such as pipeline friction loss) of the device is low, and the flow will become bigger than required. The drain valve should be closed to obtain the flow rate specified on the pump label.
Common faults and solutions of abrasion resistant and explosion proof mining multistage pumps
No liquid coming out, violent jumping of the pressure gauge, abnormal internal sound:
Too big of the slurry weight concentration --- dilute the slurry;
Serious wear on the impeller and volute --- Replace them with new and unused ones;
Feeding slurry quantity lower than required --- Increase feeding slurry or decrease slurry discharge;
Clogging of suction pipeline or insufficient valve open --- Clean the pipeline or open the suction valve
Not enough slurry input --- Increase feeding slurry input or add clean water temporarily;
Air entering at the inlet --- Check the reasons why there’s air coming in
Motor Overloaded
Too big of the slurry weight concentration --- Lower the slurry weight concentration;
Too big of the flowrate --- Increase discharge pipeline friction resistance
Vibration and noise
Cavitation --- Find out the reason and solve it;
Non-concentricity of the pump shaft and the motor shaft --- Adjust the shafts to be concentric;
Bearings damaged --- Replace with new bearings;
Too big of the medium flowrate, or too high temperature --- Increase discharge pipeline friction resistance;
Loosened fasteners or foundation --- Tighten the fasteners, strengthen the foundation
Leakage of shaft sealing water
Too big pressure of the shaft sealing water --- Adjust the shaft sealing pressure;
Wear of the packing rings --- Replace with new packings;
Gland assembly not tightened or not evenly tightened --- Adjust gland bolt
Slurry leakage of the shaft seal
Serious wear of the shaft sleeve --- Change the shaft sleeve;
No shaft sealing water or shaft sealing water pressure too small --- Add shaft sealing or increase its pressure
Insufficient flow or head
Impeller and Volute seriously worn out --- Replace with new ones;
Pipeline NPSH lower than pump’s NPSHr --- Improve pipeline devices and increase its NPSH;
Too big of the slurry weight concentration --- Lower the weight concentration or change to a bigger pump;
Scarring inside the discharge pipe --- Remove it
Overheated bearings
The pump bears the weight of the pipeline --- Adjust the stand of the pipeline, no pipeline weight bearing on the pump is allowed;
Vibration --- Check and handle vibration;
Non-concentricity of the pump shaft and the motor shaft --- Adjust the shafts to be concentric;
Inappropriate use of lubrication or lubrication gone bad --- Change the lubrication grease;
Bearings damaged --- Change with new bearings
Short packing life
Bad material of the packings --- Change to better material;
Shaft sealing water turned off --- Turn on the shaft sealing water
Oil leakage of the bearing assembly
Oil level too high --- Lower the oil level;
Failure of the rubber seals --- Replace with new ones
Pump not rotating
Volute chamber clogged by hard sediments --- Clear the sediments;
Impeller rotates out due to reverse rotation and the impeller and squeezed with the throatbush
Speed regulation of the inverter must be set on its two terminals;
b. Adjust the adjusting screw of the bearing housing, and backward adjust the pump shaft, separate the impeller from the throatbush, and turn the shaft to tighten the impeller.
XI. Water leakage of the pump head
1) Rubber Seals are not well pressed --- Re-assemble or tighten them
XII. Not rotating of Water Retainer
1) Deformation - Machine the outer circle of the water retainer off by 0.5-0.8mm
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Contact: Ms.Serena Zhang
Tel: +86 13333119820
Email: sales@cnsmepump.com
WhatsApp: +86 13333119820
Add: 260# West Huaian Road, Shijiazhuang, Hebei, China. 050051.
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