测量增压泵的性能，增压泵的功率大小并不重要，而是单元的效率。 在等升程、等流量、低功率效率的情况下，即性能良好。 泵标有高的提升流量和额定提升流量。市场上大多数泵标有高的提升流量。一些制造商的标记令人震惊，例如普通的90w和120w铜头增压泵。 标准功率为80w（大提升10m）和120w（大提升13m）。
When testing the performance of a booster pump, power rating is not the key indicator; unit efficiency matters more. A pump is deemed high-performance if it delivers the same head and flow rate with lower power consumption.Pumps are marked with maximum head flow and rated head flow, and most products on the market indicate the maximum head flow. Some manufacturers use exaggerated labeling. For example, common 90W and 120W copper-head booster pumps have standard parameters: the 80W model features a maximum head of 10 meters, while the 120W model reaches a maximum head of 13 meters.
有些商家为了得到好的销售，改成了100W(高水头12-15米)和150W(高水头15-20米)，流量也高得吓人。有自吸泵，理论吸程为10米，由于泵存在汽蚀(泵头制造粗糙引起的汽化现象)，自吸泵的有效吸程为8-8.5米。但为了吸引顾客的眼球，这些参数被标记得超乎想象。所以在购买泵之前要向卖家多了解一下泵的实际参数，比如实际扬程和实际流量，以免造成麻烦。增压泵工作时，扬程为零时大流量为零，扬程为零时大流量为零。根据每个工作点的流量和扬程的变化，可以画出该泵的工作曲线，这就是该泵的性能特性曲线。水泵选型应根据现场情况确定，如:管道长度、管径、弯头、热水器容量、热水器类型、喷头水量等。特别是压力式电热水器，由于其装置特殊，需要选用水量稍大的水泵，小流量的水泵很难有效果。管道泵的增压不是安装好了,有许多原因低水压,典型的如管老化,特别是镀锌管,经过多年的使用将逐渐生锈,导致管道堵塞引起的水流减少,也有太多的90度弯头,这也会导致水量的减少。这些原因造成的水压偏低，安装泵后效果不明显。
增压泵有一个特点，当管道流量跟不上水泵流量或超过水泵流量时，增压效果不明显。所以在购买水泵前要检查水压低的原因，不要盲目购买水泵。如果想购买，建议咨询水管工或有经验的商家作为顾问。询问业务人员的好处是，在泵增压效果不理想的情况下，可以放心地要求业务人员调换或退货。
“负压泵”、“正压泵”主要是从功能和主要研究用途来人为我们区分的。“负压泵”主要用在对中国真空（负压）有要求的场合，比如：抽气、气体通过分析、气体可以循环、气体以及采样、真空吸附、间接影响吸水等；而“正压泵”主要包括用于企业需要泵作为发展动力，进行不同气体状态转移、对密闭压力容器增压、充气打气、间接压水等，两者常用于社会医疗、科研、环保、仪器、控制技术等等这些方面。
Some merchants adjust the parameters for better sales performance. They label 100W pumps with a maximum head of 12 to 15 meters and 150W pumps with a maximum head of 15 to 20 meters, along with excessively high flow rate figures.For self-priming pumps, the theoretical suction lift is 10 meters. However, cavitation, usually caused by poor workmanship of the pump head and resulting in vaporization, limits the effective suction lift to 8 to 8.5 meters. To attract customers, many sellers mark unrealistic parameters. Therefore, it is advisable to confirm actual parameters including real head and flow rate with suppliers before purchase to avoid problems.When a booster pump operates, the maximum flow rate drops to zero when the head is zero. A pump performance curve can be plotted based on the varying flow rate and head at different operating points, namely the characteristic curve of the pump.Pump selection shall be determined according to on-site conditions, such as pipeline length, pipe diameter, number of elbows, capacity and type of water heaters, as well as water output of shower nozzles. For pressure-type electric water heaters with special structures, pumps with relatively large flow rate are recommended, as low-flow pumps tend to work poorly.A booster pump may fail to deliver satisfactory results even after proper installation. Low water pressure can stem from various factors. A typical case is aging pipelines. Galvanized pipes will rust after long-term use, causing blockage and reduced water flow. Excessive 90-degree elbows on pipelines will also cut down water volume. Under such circumstances, installing a booster pump will not achieve obvious pressure boosting effect.
Booster pumps have a distinct feature: the boosting effect will be poor if the pipeline flow is either lower or higher than the pump's rated flow. Therefore, identify the root cause of low water pressure before purchasing, and avoid blind buying.It is recommended to consult plumbers or experienced suppliers for professional advice. Another advantage of purchasing from professional vendors is that you can apply for product replacement or return without worries if the pump fails to deliver satisfactory boosting performance.
Negative pressure pumps and positive pressure pumps are classified mainly by their functions and applications.Negative pressure pumps are applied in scenarios requiring vacuum (negative pressure), such as air extraction, gas analysis, gas circulation, gas sampling, vacuum adsorption and indirect water suction.Positive pressure pumps serve as power sources for gas transmission, pressurization and inflation of closed pressure vessels, as well as indirect water pressurization. Both types are widely used in medical treatment, scientific research, environmental protection, instruments and control systems.
