With so many options to choose from in today’s day and age, buying the right pump for your application can initially feel like an overwhelming task. A task that can cost you time and money if not approached correctly. Providing detailed and accurate information is essential to finding the best pump for your application. That said, what information should be provided and what other factors should you consider when shopping for a pump? Let’s walk through some of the key factors to determining the most effective pump for your application.
What is the Flow Rate?
通常以每分钟加仑（GPM）的速度测量，流速是一种度量，该度量测量了流体在系统中移动多少以及速度的速度。计算错误的流量可能是一项昂贵的冒险。如果估计流量过高，那可能意味着电力消耗过多。如果对于应用太低，则泵可能会过度锻炼，从而有可能降低其寿命。可以使用流量计以几种不同的方式测量流速，也可以通过收集流体手动计算流量。流量计是一种简单的设备，可测量通过系统的流体量。要接收准确的流量读数，请将流量计连接到排放插座，仪表上的读数将为您提供系统的流速。要通过收集流体来计算流量，请使用容器在系统输出处收集流体。测量收集的流体，收集它的时间并使用此流速公式来找出系统的流量：
Flow Rate = Volume of Fluid Collected/Time Duration Taken to Collect Fluid
If you are still unsure of your flow rate calculations, provide the pump supplier with details like the type of work the pump will need to do and the environment it will be functioning in.
What is the Fluid Being Pumped?
提供详细的信息seller about the media being pumped. What is the viscosity of the media being pumped? A thick fluid like glycerin or corn syrup for example might require a more powerful pump then less viscous fluids like water or gasoline. What is the chemical being pumped and can an MSDS sheet on the chemical makeup be provided? An MSDS (Material Safety and Data Sheet) is a document that contains chemical makeup information and critical safety information such as health, fire, reactivity and environmental dangers of the chemical. An MSDS also contains detailed directions on how the chemical can safely be used and handled. The chemical being pumped, especially if it’s hazardous, could influence the material of the pump housing and the inner parts (diaphragms, seals, etc…), to be recommended for safe use. Other factors such as the temperature of the media and whether it contains solids is also important information to include. Providing as much detail as possible about the media being pumped will help significantly reduce the chance of an incorrect pump recommendation.
总压头是什么?
Total Dynamic Head, also commonly referred to as Total Head, is the total amount of pressure when liquid is flowing in a system. Measured in feet, static head and friction loss are the two most important factors when calculating Total Dynamic Head. What is the static head (vertical lift) of the application? The static head of the application is the height that the fluid must travel (from below ground to above ground) as it moves through the discharge pipe. The static head can be calculated by taking the lowest point the water sits and subtracting it from its highest point. What is the friction loss from the application? When liquid flows through the pipe, friction is created by liquid rubbing against the pipe, which effectively slows the liquid’s progress up the pipe down. Factors such as fittings on the pipe, elevation increases or decreases and bends in a pipe all can affect friction level.
Refer to your preferred pump manufacturer’s friction loss charts for estimating how many additional feet would be needed due to friction loss. Total Dynamic Head (measured in feet) is then calculated by adding the total static head and the total friction loss. Providing inaccurate total dynamic head information to a pump supplier could result in a pump that is more powerful that will use more horsepower than needed, which means overspending and excessive power consumption use.
图片来源：Atlas Copco
What is the Inlet/Discharge Size Needed?
泵的泵入口管的尺寸以及叶轮产生的吸力（真空）的功率决定了被吸引到泵中的介质数量，随后将其抽出插座。因此，泵入口越大，媒体将被抽出更多。根据应用和时间因素，可能需要更大的泵入口来完成工作。向泵供应商提供应用程序信息（包括进气管尺寸），以帮助确定所需的适当入口尺寸。泵的排放出口大小也是一个重要因素。通过管道从泵的排放插座排出的介质量仅限于管道尺寸，因此可能需要更强大的泵来克服诸如摩擦损失之类的变量。无法提供排放管道尺寸信息和其他因素（例如摩擦损失）可能会导致错误的泵建议和可怕的后果。如果以前有一个用于应用程序的泵，则进气口，排放插座，泵足以完成必要的工作？它是否努力保持完成工作所需的速度和压力？服务泵需要多长时间，并且有任何维修问题？ Being able to answer all these questions and provide that information to a pump supplier would provide another piece of the puzzle necessary to figure out the right pump for the job.
哪种电源可为您的泵供电？
Whether the application is indoors or outdoors, is there a power source available and is it adequate to power the pump? It seems like common sense, but this factor can be overlooked in the pump buying process. The most common power source in the United States is 115-230 Volts/60 Hertz (1 phase) or 230-460 Volts/ 60 Hertz (3 phase). Being able to answer what voltage is available from your power source is good information to provide the pump supplier. Powering a pump with compressed air is a potential option other than electricity. Using compressed air to power your pump depends on pump types that accept air, such as an air diaphragm pump, and being able to power an air compressor that can accomplish the task.
什么是环境因素？
泵将在哪种环境中使用？例如，如果将泵用于卫生环境中，则可能需要在该环境中安全使用卫生泵。在这种情况下，卫生泵将限制环境污染的机会。泵是否需要在寒冷的天气中起作用，危险或爆炸区域，完全浸入水中等等……向与您的应用程序相关的泵供应商提供环境信息对于正确的泵建议至关重要。
What Brand of Pump to Consider?
Are you buying your pump from a well-known company with a solid reputation? Buying from an established company probably means the pump is more likely to come with a higher-quality motor, materials and have potentially more available options to help you with your pumping application. Anderson Process is a distributor of several high-quality pump lines from some of the best pump manufacturers in the country, including Wilden, Blackmer, Xylem, Ampco, Gusher and Liquiflo Pumps.
To review, when buying the best pump for your application it is important to know flow rate of your system, details of the media being pumped, a total dynamic head estimate, inlet size necessary, power source available to your pump and the environmental conditions. Buying from a reputable dealer like Anderson Process is equally as important. Contact an Anderson Process engineer today to help you find the best pump for your application or for assistance with any of your fluid handling questions. Our 50+ years of fluid handling experience will aid you in selecting the best pump for your application. Saving you time and money for the years ahead.