EN CN
Home / Services / Pump Encyclopedia / Pump Technique / Teach you how to understand the performance curve of energy-efficient water pumps

Teach you how to understand the performance curve of energy-efficient water pumps

10 Jan 2021Email

The performance parameters of the water pump indicate the performance of the water pump. However, the performance parameters are not isolated and static, but are interrelated and restrict each other. For a specific pump, this connection and restriction has certain regularity. The law of change between them, usually expressed by a curve, is called the pump performance curve. It is extremely important to fully understand the performance of the pump, to be familiar with the characteristics of the performance curve, and to grasp the law of change. It is extremely important for rational selection and matching, correct determination of the installation height of the pump, adjustment of the pump operating conditions, and strengthening of the scientific management of the pumping station.

  1. The performance curves of high-efficiency and energy-saving water pumps mainly include flow-head curve (Q-H), flow-power curve (Q-P), flow-efficiency curve (Q-η).

 

  2. First, check whether the curve is flat and whether there is a hump. The flatter the curve of the high-efficiency and energy-saving water pump, the better. Of course, hump is not allowed. Second, look at which efficiency is higher. Then compare their scope which is wider, the wider the scope, the better the adjustment and use.

  3. In production practice, it is necessary to refer to the performance curve of the pump to select the operating point of the pump, so that the pump can always operate in the rate range.

   4. On the performance curve, for an arbitrary flow point, a set of head, power and efficiency values ​​corresponding to it can be found. Usually, a set of corresponding parameters is called the best working point.

  5. It is ideal for the pump to run at the most efficient point. However, the requirements of users are very different, not necessarily consistent with the performance under the most frequent point. For this reason, a range is specified (the efficiency drop is 5%~8% as the boundary), and the pump runs within this range, and the efficiency drop is not too large. This range is the pump's working range (also called range). Beyond this range, the efficiency is low and uneconomical.

Related Pump Knowledge
More Pump Knowledge
19 Jan 2021
Sewage pumps are getting more and more attention due to their wide range of uses and strong sewage capacity. However, improper use or maintenance will...
Read more
19 Jan 2021
Pay attention to the use of the submersible pump when it is in operation to avoid burn-in caused by improper use. Some taboos should be paid attention...
Read more
18 Jan 2021
Explosion-proof mining pump with balance plate refers to MD type multi-stage centrifugal pump for mining. MD type pump is mainly composed of stator, r...
Read more
18 Jan 2021
When we use non-leakage chemical pumps, we must understand the reasons why the impeller speed of the non-leakage chemical pumps decreases, so that the...
Read more
Related Products
More
Split Case Pump
Split Case Pump
  • Capacity:60-33005m³/h
  • Head:0.95-30.2bar
  • Price:$2200-215000
Double Suction Pump
Double Suction Pump
  • Capacity:60-33005m³/h
  • Head:0.95-30.2bar
  • Price:$2200-215000
Single Stage Chemical Pump
Single Stage Chemical Pump
  • Capacity:5.5-2600m³/h
  • Head:1.6-25bar
  • Price:$4300-37000
End Suction Chemical Pump
End Suction Chemical Pump
  • Capacity:5.5~400m³/h
  • Head:0.42-12.5bar
  • Price:$560-9800
Need More Information?
Contact us for more details about our pump, solutions and services.
Contact ZB
Tel
0086 731 88192011
Leave a message
Name*
Tel
Email*
Area
Products
Split Case Pump
Metallurgy
Mining Industry
Urban Water Supply
Petrochemical
Light Industry
Electricity
Chemical Industry
Farmland Irrigation
Other
Provide your comments and questions.