The first thing to determine when choosing a water pump is the type of pump. For the stainless steel submersible pump we use here, we need to determine whether the required pump is for well use or sewage discharge, building pressurization or fountain landscape. We first need to determine the direction of use of the stainless steel submersible pump and determine the correct operating conditions in order to choose the appropriate pump type< br /> Determine product parameters

When we know the type of pump, we need to determine the parameters required for the product. For example, we need a fountain pump, which generally has a large head. Our landscape engineering needs to pump 20m3/h of water to a height of 8m. At this time, we need to determine the parameters of the stainless steel submersible pump, with a flow rate of 20m3/h. However, because the fountain usually pumps water vertically upwards, we need a higher head than the expected water level. When we pump it to a height of 8m, we may need to pump it to a height of 10m or more. Once the parameters are determined, the selection will be more accurate

After determining the product category and parameters, whether the water pump can meet the requirements also depends on understanding the usage environment. For example, when stainless steel submersible pumps are used for deep well water extraction, after determining the pump type and parameters, we also need to understand the situation of the water well, such as the diameter of the wellhead, dynamic and static water levels, water quality, and so on. Only after determining these issues can we finally install a suitable pump

Before selecting the pump type, please understand the environmental data used by the water pump

1、 List basic data:
1. Characteristics of the medium: medium name, specific gravity, viscosity, corrosiveness, toxicity, etc.
2. The diameter and content (mass or volume percentage) of solid particles contained in the medium
3. Medium temperature: (℃)
4. Required traffic
Generally, industrial pumps can ignore the leakage in the pipeline system in the process flow, but the impact of process changes on flow rate must be considered. If agricultural pumps use open channels for water transportation, leakage and evaporation must also be considered< br /> 5. Pressure: Pressure drop (head loss) in the pressure pipeline system of the suction pool, drainage pool, and pressure pipeline system
6. Pipeline system data (diameter, length, type and number of pipeline accessories, geometric elevation from suction tank to pressure tank) should also be provided with device characteristic curves if necessary. When designing and arranging pipelines, the following precautions should be taken:
A、 Reasonable selection of pipeline diameter. With a large pipeline diameter at the same flow rate and low liquid flow velocity, the resistance loss is small but the price is high. A small pipeline diameter can lead to a sharp increase in resistance loss, resulting in an increase in the head of the selected pump, an increase in belt power, and increased costs and operating costs. Therefore, a comprehensive consideration should be given from both technical and economic perspectives B、 The discharge pipe and its fittings should consider the maximum pressure they can withstand C、 The pipeline layout should be arranged as straight as possible to minimize the number of accessories in the pipeline and minimize the length of the pipeline. When turning is necessary, the bending radius of the elbow should be 3-5 times the diameter of the pipeline, and the angle should be greater than 90 ℃ as much as possible D、 The discharge side of the water pump must be equipped with valves (ball valves or globe valves, etc.) and check valves to regulate the operating point of the pump. Check valves can prevent the pump from reversing and prevent water hammer strikes when the liquid flows back (huge reverse pressure will be generated when the liquid flows back, causing damage to the pump)
2、 Determine flow head
Determination of traffic a、 If the minimum, normal, and maximum flow rates have been given in the production process, they should be considered based on the maximum flow rate
b、 If only normal flow rate is provided in the production process, a certain margin should be considered for ns> A large flow rate of 100 is low, and the unintentional head pump has a flow margin of 5% for ns> The flow margin of a small flow high lift pump with a flow rate of 50 is 10%; The pump flow margin of ns≤ 100 should also be set at 5%. For pumps with poor quality and poor operating conditions, the flow margin should be set at 10%.
c、 If the basic data only provides weight flow rate, it should be converted to volumetric flow rate

If you are still unsure, call our engineers. Suokang engineers are always by your side to serve you