How To Optimize The Pump System
Jan 22, 2026
In terms of energy usage, water pumps are a low-cost product. However, they account for 25% of the total energy consumption of industrial motors, and for pumping intensive applications such as urban water, wastewater, and processing plants, this number is much higher.
Although the efficiency of pumps is high - up to 90% for a single device, many facilities are not close to the efficiency they can typically achieve.
Therefore, when it is necessary to replace the pump or significantly reduce costs, optimizing the pumping system may be a way out.
The following four steps can be taken to optimize the pumping system.
1. Reduce the system head.
The first step is to reduce the system head and the energy required to achieve it. The system lift is
(1) The sum of the pressure difference and height required for the pump to lift the fluid (static head)
(2) The resistance (frictional head) generated when a fluid passes through a pipeline
(3) The sum of the resistance generated by any partially closed valve (controlling head).
Among these three, controlling the head provides the best energy-saving goal. Most systems use valves because their pump specifications are too high and require throttling to maintain appropriate flow. For most systems with excessive control head and ongoing maintenance issues, purchasing smaller pumps that better meet flow requirements or switching to variable speed pumps can help users reduce system control head and save electricity and maintenance costs.
2. Lower flow rate or running time.
Some pumps run continuously, regardless of whether the process requires all the flow. When the system is diverted, operators have to pay for the electricity they have not effectively utilized. There are two ways to solve this problem. One is to switch to a variable speed pump, which can increase or decrease the flow rate as needed. The second method is to use a set of mixing pumps, some larger and some smaller, and turn them on and off in stages to meet the demand. Both methods can reduce bypass flow and save energy.
3. Modify or replace equipment and controls.
If the energy savings of lower head and lower flow rate/operating time seem attractive, the owner should consider replacing the equipment and control system. If the system uses a large number of valves for throttling, replace them with smaller pumps that do not require throttling and have lower operating costs. For systems with multiple pumps and fluctuating demands, major repairs may include smaller or variable pumps and control logic that automatically opens and closes the pumps as needed.
Fourthly, enhance installation, maintenance, and operational practices. Surprisingly, many maintenance issues begin with installation. A broken foundation or improperly aligned pump may cause vibration and wear. Improperly configured suction pipes may cause premature wear due to cavitation or hydraulic loads. Be sure to discuss installation support when purchasing a pump. For critical applications, paying pump commissioning fees to third-party experts is meaningful to ensure that the new pump operates as designed throughout its entire lifespan.
There are many ways to handle daily maintenance. For small and inexpensive pumps that cannot meet critical requirements, they may incur costs due to operational failures. For most pumps, routine preventive maintenance is meaningful. Predictive maintenance - collecting data and using it to determine when operators need to intervene - is a powerful tool for keeping pumps compliant with specifications. This does not require complex or expensive costs. By measuring factors such as pump pressure, energy consumption, and vibration on a monthly or quarterly basis, operators can capture efficiency changes and plan remedial measures before potential issues that may cause failures arise.