Pressure switch is working for safety overpressure protection only, because there is PT on the main line to adjust the VFD (attach new schematic)
VFD is adjusted to work on 4.5 bar.
I was going to use API 610 and set the pressure switch on the shut-off pressure of the pump or little bit, what...
Dear @georgeverghese
Thank you for your reply, I attached the sketch
and here is the reply
Show us a process sketch which shows how this pump is controlled:
Pump use VFD.
Level Transmitter and Pressure switch signals used to stop the Pump.
Max normal level in the feed storage tank:
18...
The pump is used only for water distribution but the water will go pass first on surge vessel then water go to network.
Now the consultant is asking about documented paper or standard state how to calculate the value of pressure switch
Thank you MortenA
Thank you so much Littleinch, it is a high pressure, what you mean by connected system?,
ADo you mean design pipe pressure because it is a discharge pump from storage water tank used for water distribution.
