Hi all,
I have a general question on the use of PRV's at individual services for a "closed" distribution system, i.e. pumps directly draw from a treated reservoir and feed to end-users with no elevated/pressure tank and storage elsewhere.
I have come across an existing design for a partially built-out community that has its own treatment system. Most of the pumps are on VFD's and have control logics programmed to act according to the pressure indicating transmitter to "control" the output pressure as needed. I did not see a main PRV downstream of the pump headers and in the grid.
Is it a good practice to have PRV's installed on all the housing services, regardless of the pressures indicated by simulations under min flow, ADD, MDD and etc.? My thought was that surges can occur, and if control is not operating as it should, pumps may deliver at full speed all the way to the shutoff head when demands are low. I'm also not sure if rupture discs and such were installed at the pump station for protection (I may find out).
Thanks in advance for your insights!
Anthony