Pumping processes are used in various industrial activities, such as dewatering, pumping of condensate, chemical dosing or hot water circulation. A common use of pumping in the manufacturing and services sector is the circulation of liquids like fuel, water, chemicals, oil, petroleum, sludge, slurry or reactants.

Throttle controls are typically used on fixed-speed pump systems to vary the flow rate to match other system inputs. However, this can consume energy both through the operation of the throttling valve and through loss of pump efficiency when it is not used at its most efficient operating point.

With a variable speed drive, the speed of the pump and the pumping rate can more closely match the flow rate of the system as it varies over time. This reduces or eliminates energy losses associated with throttling and more closely maintains the best efficiency point for the pump.

Sectors and common applications

  • Electricity generation – pumping of coolant, condensate extraction pumps and boiler feeds.
  • Mining – mine dewatering, slurry and wastewater extraction, flocculant dosing or provision of fire-fighting systems.
  • Manufacturing – boiler feed, hot water circulation, mixer pumping, condensate and dosing, as well as transfer systems and others.
  • Oil and gas – systems on oil tankers and offshore platforms, dewatering and coolant.


  • 73/100
  • Energy saving across sectors is 60 PJ (2014 estimate).
Indicator Score
1. Energy saving potential  
1.1 Level of energy efficiency 15/15
1.2 Market prospect 2/10
1.3 Energy saving potential 9/10
2. Technical practicality  
2.1 Innovative or advanced nature 15/25
2.2 Reliability 6/10
3. Economic characteristics  
3.1 Investment per unit energy 8/10
3.2 Payback period 10/10
3.3 % of Industry $ gross added value 5/5
4. Social characteristics 3/5