• PSV Modelling and How it Works in WaterGEMS?

    PSV Modelling and How it Works in WaterGEMS?
  • PSV Settings and Reverse Flow through Pump

    First I have a PSV and I was wondering if someone could explain the difference in setting it to the max elevation of the tank and the minimum elevation of the tank and if the sets below were correct way of doing it. When I set it to the max elevation…
  • WaterCAD - Negative pressures due to Submersible Well Pump Not delivering enough head with storage tank at low elevation

    Hi All, In waterCAD, I am modeling submersible well pumps which will pump into a tank about 12,000+ ft away. The wells are located at a higher elevation compared to the storage tank. My main question is on how to model accordingly to have no negative…
  • How to model a PRSV that will allow reverse flow

    I'm modeling a looped system where the southern half of the loop is significantly lower in elevation. I wanted to put PRVs at two locations on the east and west ends of the loop where the the northern plateau drops sharply down into the valley to the…
  • RE: WaterCAD - PRV and PSV

    Are you trying to model a combination PRV/PSV? If so, please take a look at the following article I just created and let me know if that configuration will accurately model what you want. How to model a Combination Pressure Reducing Valve (PRV) and…
  • WaterCAD - PSV and PRV in series

    Hi, I am having a problem with my static WaterCAD model as follows: I have two sites, let's call them Site A and Site B. Site A is being supplied by a reservoir + pump combination. Site B is being supplied by a tank. Site A is at a lower pressure…
  • Questions regarding PSV configuration for pressure control at GW pump station and System Head Curve

    Dear All, I’ll appreciate it if you could help me troubleshoot the following two issues. I am somewhat new in Watergems modeling. The current project is for a mixed landuse development where the only source of water (for the time being) is a groundwater…
  • Re: regulator valves in EPANET

    It's unusual to see a flow through an FCV that is higher than the setting. Check and make sure that the valve isn't reversed (it will only control flow in one direction, not both directions) - to do this, right click on the valve, select reverse then…
  • WaterCAD for Reclaimed Water

    Any suggestions on how to model a reclaimed water system that delivers water to multiple (bulk) storage ponds? Each pond has a level control and a pressure staining valve. Is there a way to simplify this model, I can't justify trying to model all the…
  • Re: Tank Inlet

    Bargothi, In the help documentation, there is a "modeling tip" section that explains how to do this. For steady state or EPS, it is recommended to place a PSV upstream of the tank, set to the tank top elevation. This basically forces the HGL up…
  • Re: WaterCAD V8 XM Top feed Tank Modelling

    Hello, Did you set the PSV elevation to the elevation of the top of the tank? I would suggest setting up a profile to get a better idea of why this happens. The pressure is calculated from the difference between the hydraulic grade and…
  • Re: Settings for PSV

    There's an old hydraulic modeling saying that says you should "model what you've got". In other words, if these plug valves exist (or if you already have a design in mind) then you should use the real valve parameters. Do they (or will they) actually…
  • Re: System disconnected during analysis

    It's difficult to know for sure what you mean without more information. But it sounds as though you have a pump with a tank or reservoir and maybe some portion of the system upstream of it, so maybe this pump is being used to pump into a boosted zone…
  • Control valve response to transient event

    Is there a way to model the response of a control valve to a transient event beyond manually inputting the transient operational pattern? An example would be what happens to a PSV when the transient pressure drops below the pressure set point.