1. Stainless steel submersible pump head selection
The so-called stainless steel submersible pump head refers to the required head, not the lifting height. It is particularly important to know this point for the selection of a water pump. The pump lift is approximately 1.15~1.20 times the lifting height. For example, the vertical height from a water source to the place where the water is used is 20 meters, and the required lift is about 23 to 24 meters. When selecting a water pump, the head on the nameplate of the pump should be close to the required head. In this case, the pump has the highest efficiency and will be more economical to use. But it is not necessarily required to be absolutely equal. Generally, as long as the deviation does not exceed 20%, the pump can work in a more energy-saving situation.
2. How big is the nameplate head?
Choosing a pump with a lift on the nameplate that is much smaller than the required lift will often fail to meet the user's wishes. Even if it can pump water, the water volume will be pitifully small, and it will even become a useless "idle pump". . Is the higher the pump lift the better? In fact, it is not. If the pump with high head is used for low head, the flow will be too large, causing the motor to be overloaded. If the motor is running for a long time, the temperature of the motor will rise, the winding insulation layer will gradually age, and even the motor will be burned.
When choosing the pump head, it is necessary to know the concept of the total pump head H and the net pump head H1 and their relationship. Net head H1 (also called actual head, refer to the nameplate of the pump) refers to the vertical distance from the water inlet surface to the center of the water outlet (or drain surface).
3. Choose a stainless steel submersible pump with a suitable flow rate
The flow rate of the stainless steel submersible pump, that is, the water output, generally should not be too large, otherwise, the cost of purchasing the pump will increase. Specific problems should be analyzed in detail. For example, the self-priming water pump used by the user's own draft should have a smaller flow rate; such as the user's submersible pump for irrigation, a larger flow rate can be selected appropriately.
