How to choose a pump

Customer product selection notes:

water pump selection lists basic data:

1. Medium characteristics: medium name, specific gravity, viscosity, corrosiveness, toxicity, etc.

2. Particle diameter and content of solids contained in the medium.

3. Medium temperature: (℃℃)

4. Required flow rate. For general industrial pumps, the leakage in the pipeline system can be ignored in the process flow, but the impact of process changes on the flow rate must be considered. If agricultural pumps use open channels to transport water, leakage and evaporation must also be considered.

5. Pressure: suction tank pressure, drainage tank pressure, pressure drop in the pipeline system (head loss)

6. Pipeline system data (pipe diameter, length, type and number of pipeline accessories, geometric elevation from suction tank to pressure tank, etc.)

7. Pump material and sealing form

8. Select the appropriate use range and structure of the pump according to flow rate and head

9. Select the form of the pump according to the installation site (vertical, horizontal, transmission form)

10. Select the driving power according to the power source supply

11. Select the structure of the pump according to the purpose (clean water pump, fire pump, sewage pump, etc.)

Flow head of water pump selection Flow determination:

1. If the minimum, normal and maximum flow rates are given in the production process, the maximum flow rate should be considered.

2. If only the normal flow rate is given in the production process, a certain margin should be considered. For high-flow, low-lift pumps with ns>100, the flow margin is 5%. For low-flow, high-lift pumps with ns<50, the flow margin is 10%. For pumps with 50<ns≤100, the flow margin is also 5%. For pumps of poor quality and poor operating conditions, the flow margin should be 10%.

3. If the basic data only gives weight flow, it should be converted into volume flow.