What you will achieve
- Define daytime and nighttime periods.
- Connect each time with the active target.
Step-by-step tutorial
How to schedule a PRV for day and night
Set daytime and nighttime pressure targets for a pressure-reducing valve and run the simulation.
You can also follow the written stepsThe written steps and explanations in this chapter describe the workflow. The YouTube player loads only when you select Watch tutorial.
Before you start
- Use a model with a correctly oriented pressure-reducing valve.
- Confirm starting clock time and INP units.
01
Choose the day/night schedule
Select the PRV and enable its daily program. Set the start time and pressure target for each period.
- Times belong to the model clock.
- Use pressure head in the displayed unit; do not mix SI and US.
02
Run the simulation
Run the extended period simulation and stop at one representative time in each period. Confirm the active time before comparing.
- A scheduled target does not replace other hydraulic conditions.
- Recalculate after editing time or pressure.
03
Compare both states
Review the valve, map, and downstream results at daytime and nighttime. To place both states on the same route, use the profile comparison.
Do it in WatDis
- Set daytime and nighttime targets.
- Run and visit one time in each period.
- Record time, target, and resulting pressure separately.
Common mistakes
Confusing clock time and elapsed time
Check both labels before describing the active period.
Mixing units
Keep all targets in the unit system shown for the model.