Table of Contents
How do I Choose a BLDC Water Pump?
Flow Head Requirements
Whether your application is used for liquid delivery, cooling, circulation, water supply, or other purposes. Determine the required flow rate, head (note the distinction between theoretical head and head) and working pressure. Maximum flow and maximum head required. Calculate the required flow and head based on the location of the liquid delivery, the length of the pipeline and the height difference. Generally, the flow rate of the circulating pump is lower than that of the cooling pump. The adjustment mode and use scenario of the two are also different. The former does not need adjustment, the latter does. At the same time, we can refer to the range of existing values in the corresponding application fields in the target area market. For example, the head range of dishwasher in western countries is 0.5 to 1.2m, the flow is 8 to 12 liters per minute, China is slightly different from 0.5 to 1.5 meters, and the flow is 8 to 15 liters per minute. The specific precise value is discussed and decided with the relevant technical supporter
Calculate the required power (power divided into pump shaft power and pump output power) to ensure that the selected dc water pump has enough drive to meet the application requirements (required flow and head) Power is equal to the voltage (such as the commonly used 12V, 24V) times the current, the head flow increases the power also increases and the efficiency of the pump generally decreases. The exact value shall be discussed and decided with relevant technical supporter.
Pump Size and Weight
Weight and size are very important for your application and product, because if you choose the wrong size, it will be too big to install, and too heavy will affect the heavy weight control requirements of your product. So, you should choose a pump with suitable the size and weight to meet your needs.
Moreover, size and weight generally increase with the increase of head flow, weight is related to material density, size and design structure. Both are also related to the motor, the application scenarios and requirements. Consider the pump installation mode and the support structure.
To choose a pump rightly you should determine the properties of the liquid you wan use the pump to be pumped, including viscosity, temperature, and corrosion, different pumps are suitable for different types of liquids.
You should select the appropriate material according to the nature of the pumping medium. For example, the friction coefficient of the material, hygiene level, especially in the treatment of corrosive medium or high temperature medium, should choose corrosion resistant or high temperature resistant materials.
Bearing, Shaft &Pump Motor Type
Brushless DC motor shall be selected with appropriate power, durable and reliable. The shaft considers the smooth strength and stiffness and the geometric size. Bearing considers reliability, lifespan, load capacity.
Pump Head, Outlet , Seal and Noise
According to the head flow rate, the system pipe size and connection requirements, choose the appropriate pump head, inlet and outlet size. Sealing according to the medium and the application environment. Humps are associated with vibratory noise.
Consider whether speed control is needed for you and adjust the flow and head as required. The brushless DC centrifugal pumps are usually equipped with controllers to control the flow and head by adjusting the speed. Select with appropriate control modes such as voltage / frequency / PWM / PID closed loop / intelligent control to meet specific application requirements.
Reliability and Maintenance
You should view the manufacturer-provided reliability data and pump maintenance requirements. Brushless DC pumps usually require less maintenance. Understand the reliability and maintenance requirements of the pump, and select the brands and models with good performance and long lifespan. Consider the maintenance of the equipment.
After considering the above factors, a cost analysis was performed. You can compare the prices of different models and brands, and choose a cost-effective pump to meet the demand and budget.
Manufacturer and Suppliers
You can choose a reputable manufacturer or supplier who will usually provide quality products and technical support.
Feedback and Evaluation
Check out other user feedback and comments for pump performance in practical applications.
In short, the selection of brushless DC centrifugal pump needs to consider a variety of factors according to the specific application conditions and requirements, to ensure that the selected pump can work stably and reliably, and meet the required flow and head requirements.