List the basic data for selecting a centrifugal pump for clean water:
1. Characteristics of the medium: medium name, specific gravity, viscosity, corrosiveness, toxicity, etc.
2. What is the particle diameter and content of solids contained in the medium.
3. Medium temperature: (℃)
4. The flow rate required for a clean water pump is generally negligible for industrial pumps in the process flow, but the impact of process changes on the flow rate must be considered. If agricultural pumps use open channels for water transportation, leakage and evaporation must also be considered.
5. Pressure: suction tank pressure, drainage tank pressure, pressure drop (head loss) in the pipeline system.
6. Pipeline system data (diameter, length, type and number of pipeline accessories, geometric elevation from suction tank to pressure tank, etc.).
7. Material and sealing form of centrifugal pump
8. Select the appropriate range and structure of the pump based on flow rate and head
9. Select the form of the clean water pump (vertical, horizontal, transmission form) according to the installation site
10. Select the driving power based on the power supply
11. Select the structure of the pump based on its intended use (such as clean water pump, mud pump, sewage pump, etc.).
Determination of flow rate, head, and flow rate for centrifugal clean water pump selection:
1. If small, normal, and large flow rates are already provided in the production process for centrifugal clean water pumps, they should be considered for large flow rates.
2. If only normal flow rate is given in the production process, a certain margin should be considered. For high flow low head pumps with ns>100, a flow margin of 5% is taken. For low flow high head pumps with ns<50, a flow margin of 10% is taken. For pumps with 50 ≤ ns ≤ 100, a flow margin of 5% is also taken. For pumps with poor quality and harsh operating conditions, a flow margin of 10% should be taken.
3. If the basic data only provides weight flow rate, it should be converted to volume flow rate.
