Changsha Zoomlian Pump Co., Ltd. 长沙中联泵业股份有限公司

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    What technical parameters of the pump must be provided by the purchaser when buying a pump?

    Publication Date:

    2026-01-19

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    When buying a water pump, just say right away, “I’ll take a 22.” kilowatt “How about getting a quote for the pump?” Many customers think that providing just the motor power is sufficient—but when it comes to the essential parameters required for pump selection, such as flow rate and head, they’re completely clueless. As a result, the pumps they end up choosing either fail to deliver smoothly, consume excessive energy, or even break down within just a few days of use. In fact, motor power is merely the “output capacity” of a pump; what truly determines the right pump model are the core operating parameters. Without these critical parameters, even the most precise power rating won’t lead you to the right pump choice. In this article, the pump manufacturer... Changsha Zhonglian Pump Industry We will now introduce the technical parameters that the purchaser must provide when procuring a water pump. Only by providing these required parameters can the pump manufacturer accurately select the appropriate pump model for the customer.

     

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    First, let’s clarify a key point: power is the result, not the premise. Similarly, 22kw The water pump may be compatible with per hour. 30m It can also meet the requirements of small-flow, high-head scenarios. 100m For high-flow, low-head applications, simply quoting the power rating is like asking merchants to “guess blindly”—and they’ll most likely end up making a wrong choice. If you want to select a pump that’s just right for your needs, this... 5 You must clarify this parameter in advance:

    1. Medium characteristics: First, specify whether the medium to be conveyed is clear water, wastewater, acidic or alkaline liquid, or a medium containing particles—for example, one containing... 1.5% The pump body material required for slurry from slag and for pure clean water (wear-resistant) / ordinary), the sealing methods are completely different, even though they are all... 55kw Power—choose the wrong material, and it’ll quickly wear out and become unusable.

    2. Actual flow demand: How much medium needs to be conveyed per unit of time (unit: [unit]) m ³ /h )? For example, workshop cooling requires every hour. 50m ³Recirculating water—this is the core data—same as before. 55kw If the flow rate is set too high, it will waste energy; if it’s set too low, it won’t meet production needs. It’s recommended to add based on peak demand. 10%-15% Margin to avoid overload due to traffic fluctuations.

    3. Required head: How much resistance does the pump need to overcome? (Unit: ) m )? It’s not just about increasing the height— you also need to account for factors like pipe length and elbow losses. For example, if you’re trying to deliver water to... 10 With a meter-high water tank and considering the resistance in the piping, the actual head may be... 15 Meter—just select the pump based on height, even if... 55kw There may also be cases where items cannot be delivered successfully. We recommend adding... 5%-10% Safety margin.

    4. Operating temperature and pressure: The medium temperature is 20 ℃ Normal temperature, or... 100 ℃ high temperature? Is the working pressure exceeding...? 1.6MPa ? These can affect the strength of the seals and pump body—such as... 55kw The ordinary pump can't handle it. 150 At high temperatures in ℃, forced use may cause sealing leaks; therefore, you must select a specialized model that is suitable for high temperatures and high pressures.

    5. Installation and Cavitation Conditions: Is there sufficient space to install a horizontal pump, or is a vertical model required? Additionally, please provide the system’s effective net positive suction head (NPSH). NPSH ), avoid 55kw The pump experienced cavitation due to improper installation, resulting in impeller corrosion and abnormal vibration and noise.

    Actually, when choosing a water pump, don’t get hung up on the wattage—just focus on this first. 5 Once the operating condition parameters are clearly defined, merchants can precisely match the appropriate model—for example, similarly... 55kw Depending on the flow rate and head, a recommendation may be provided. DF Corrosion-resistant pump, or possibly... MD Wear-resistant pump model. If you’re unsure how to calculate the parameters, just reach out directly to the technical team to discuss your operating conditions—this approach is far more reliable than blindly specifying the power rating.

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