First, to determine the application background and environmental conditions
According to the engineering environment, to confirm the installation location of the pump, space limitations and special conditions of the working environment.
Understand the nature of the slurry conveyed, including concentration, particle size, chemical properties.
Second, choose the basic pump type
With the world’s advanced level of powerful pump industry slurry pump as an example, according to different slurry characteristics and working conditions, select the appropriate pump type is crucial. The following are some basic selection suggestions:
L-type pump for low abrasive slurry: low abrasive slurry, you can consider choosing powerful pump L-type pump.
KSH type pump for high concentration strong abrasive slurry: for high concentration and strong abrasive slurry, strong pump KSH type pump is an ideal choice.
KSS type pump for liquid level change and invasion of submerged work: in the case of liquid level change and need to work under the liquid, powerful pump’s KSS type pump is a good choice.
ZGB and KSHH type pumps are used for high head conveying: when high head conveying is required, consider choosing ZGB and KSHH type pumps from Mighty Pumps.
KWPSA series for low concentration, low to medium abrasive, non-clogging conditions: KWPSA series can be selected from different materials in different working condition applications.
Third, the system performance parameters to determine
1.speed selection
For high concentration of highly abrasive slurry, choose low speed pumps to improve pump stability and reduce wear.
Multiple pumps can be connected in series to meet the flow and head requirements of the system.
2. Flow range limitations
For high concentration of strong abrasive slurry, the flow rate should be selected in the range of 40%-80% of the corresponding flow rate of the highest efficiency of the pump.
For low concentration of less abrasive slurry, the flow range can be selected in the pump maximum efficiency corresponding to the flow rate of 40% -100% range, to avoid choosing more than 100% range.
3. head margin
Select a reasonable margin
Ensure that the pump in operation can be maintained for a long time in the rated condition near, improve service life.
Fourth, according to the specific conditions of the slurry pump components for fine-tuning is to ensure that the pump can effectively run the important steps
1.overflow parts material selection
According to the characteristics of conveying slurry, including particle composition, particle size, shape, hardness and concentration, etc., choose the appropriate material of over-flow parts.
According to the chemical characteristics of slurry (acidity, alkalinity, oil, etc.), to ensure that the overflow parts have good corrosion resistance.
2.Shaft seal type selection
According to the specific working conditions to choose the appropriate shaft seal form, such as packing seal, sub impeller power seal and mechanical seal.
For backflow work, the use of vice impeller seal can be considered, but need to pay attention to the high pipe pressure should be less than 10% of the pump outlet pressure, and need to consider the increased power consumption.
For packing seals, make sure there is enough shaft sealing water, the water pressure is usually equal to the pump outlet pressure plus 3.5 meters head.
3.Transmission mode selection
The transmission mode of slurry pump, including V-type triangular belt drive, coupling drive, gear reduction gearbox drive, hydraulic coupling drive, variable frequency drive and so on.
Considering the cost and convenience, coupling and V-type triangle belt is more economical and easy to disassemble the choice.
Note that the V-belt may increase power consumption by 5%, which needs to be considered comprehensively.
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