Measuring the performance of the pump is good or bad, the size of the power is not important, but the unit efficiency. In the same head, the same flow case, the small power of high efficiency, that is, good performance. The pump has the highest head flow and rated head flow of the labeling method, the market most of the pumps are marked by the highest head flow, some manufacturers mark the pump is very outrageous, such as ordinary 90w and 120w copper pump head booster pump, the standard power of 80w (the highest lift of 10 meters) and 120w (the highest lift of 13 meters).
Some businesses in order to achieve good sales, into 100w (maximum lift 12-15 meters) and 150w (maximum lift 15-20 meters), the flow is also high scary. There are self-priming pumps, the theoretical suction is 10 meters, due to the pump NPSH (pump head roughness caused by water vaporization phenomenon) exists, self-priming pump effective suction is 8-8.5 meters. However, in order to attract business customers to these parameters beyond the standard mark. So before buying the pump to the seller to understand the actual parameters of the pump, such as the actual head and the actual flow, so as not to cause trouble. Booster pump at work, head when the maximum flow to zero, to the highest head when the flow is zero. According to the conditions of the flow and head changes, you can draw the pump's working curve, which is the performance curve of the pump. Pump selection should be based on the site to decide, such as: the length of the pipe, pipe size, the number of elbows, water heater capacity, water heater type, nozzle water and so on. In particular, pressure-type electric water heaters, due to its special device, to be used slightly larger water pump, small pump is difficult to play a small effect.
Pipeline booster is not installed water pump on the downtime, resulting in low water pressure for many reasons, such as the typical pipeline aging, especially galvanized pipe, the use of corrosion gradually after years, leading to pipeline blockage caused by reduced water flow; Degree elbow too much, will result in reduced water flow, as the water pressure caused by these reasons is low, the effect is not obvious after the pump installed.
Booster pump has a characteristic, when the pipeline flow can not keep up with the flow of the pump or pump flow, the boost effect is not obvious. Therefore, before the purchase of water pumps to check the reasons for the low pressure, you can not blindly buy pumps. To buy, it is advisable to consult a plumber or find an experienced business staff. The benefits to the business staff is that if the pump pressure is not satisfactory results can be confidently require businesses to exchange or return.
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