Proportional pressure is used in circulation systems with a pipe system with low pressure loss and control valves to generate a variable flow.
The pressure drop in the control valves is lower than 50% of the total pressure drop.
- Heating systems with 2-way valves
- Air-con system with 2-way valves
Illustration 1:
- Constant speed pump
- Diff. pressure controlled
Illustration 2:
- Constant speed pump
- Diff. pressure controlled
