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APPENDIX A - Examples
Graphics Example of Reducing
Time control - Two pressure points
Night-time pressure has been significantly reduced, consequently the water losses due to
leaks have also been reduced. During the day it is restored pressure to meet the daytime
demand. The flow downstream of the PRV, and the pressure at the “critical point "of the
system can also be measured more control over the zone.
The downstream pressure is regulated between two pressures. No flow variation significantly
affects the output pressure.
Control Time - Two pressures
Up to 32 time points can be programmed to vary the downstream pressure between two
preset values of high and low pressure. Four values (t1, t2, t3 and t4) are shown in the
following application:
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