1. Characteristics of the medium: medium name, proportion, viscosity, corrosion, toxicity, etc.

2. The diameter and content of the solid particles contained in the medium.

3. Medical temperature: (℃)

4. The required flow general industrial pumps can ignore the leakage volume in the pipeline system in the process, but the impact of the flow when the process changes must be considered. If the agricultural pump is used in water, the leakage and evaporation must be considered.

5. Pressure: Pressure of water absorption ponds, pressure of drainage pools, and pressure in pipeline systems (losses).

6. Pipeline system data (pipe diameter, length, type of pipe attachment, number and number of pipeline accessories, geometric standards from pools to pressure ponds).

If necessary, you should also make a device characteristic curve. When designing and laying pipes, pay attention to the following matters:

1. Reasonably select the diameter of the pipeline, the diameter of the pipeline is large, under the same flow, the fluid flow speed is small, the resistance loss is small, but the price is high, the pipe diameter is small, which will lead to the sharp increase in resistance. Increased power, cost and operating costs increase. Therefore, we should comprehensively consider from the perspective of technology and economy.

2. The maximum pressure that the discharge tube and its pipe joint should be considered.

3. The layout of the pipeline should be arranged as a straight pipe as much as possible, minimizing the attachments in the pipeline and shrinking the length of the pipeline. When you must turn it, the curved radius of the elbow should be 3 to 5 times the diameter of the pipeline. °.

4. The discharge side of the pump must be installed with valve (ball valve or deeper valve, etc.) and inverse stop valve. The valve is used to regulate the working point of the pump. The inverse valve can prevent the pump reversal when the liquid is flowing, and the pump can avoid the blow of the water hammer. (When the liquid flows back, it will cause huge reverse pressure to damage the pump)