Thanks bimr,
You are correct, the pipes are 500mm diameter. The network is distributing potable water for municipal and industrial used for a factory area. I meant by the faucets to just describe demand points connected to the network (but they are not really faucets as you mentioned).
As you...
Dear bimr,
I used to know that high quality vacuum breaker valves fully open at a pressure differential of 0.05 bars (negative).. the steady state pressure of the line will be enough to seal the valve of course.
The problem with the float valve you have mentioned is its setting. The water...
Hello All,
Thank you very much for your contribution. I am really proud of being part of this forum as it contains smart people like you..
The attached figure helps describing the system better. I feel that the enhanced check valve will never be able to close after power failure as water...
I shall use the air valve next to the hydropneumatic tank or I can use dipping tube vessel.. I am much comforted to the gooseneck solution than the pump control (energize to open) valve.. at least it is more assured to work
Thanks pumpsonly for your reply..
Operation at the pump station is automatic.. I have 6 pumps operating in parallel during period of high demand (total flow of 330 lit/sec and velocity 1.6m/sec) and this number decreases with demand decrease according to the pressure.. when no flow is being...
I have been using watercad and watergems v8 for 4 years but I have never used watercad 7 :)
can you tell me how would you like the report to be?
There are other reports available in the Report menu like Scenario Summary and Project Inventory reports..
you can also ask in the Bentley...
Dear Bimr,
Thank you for your response,
What do you mean by "an energize to open fail close valve in the suction line to the pump"?
I think I will have air into the system any way when I loose pressure (when power fails) as there are high points in the network with air valves installed. they...
You can select Report --> Element Tables --> Pipe (for instance). this will open the flex table for you. Just edit the table to place the fields you want to include in the report.
Then click on the Report button (the third one from right) and select to Report the current time step.. a window...
You can select Report --> Element Tables --> Pipe (for instance). this will open the flex table for you. Just edit the table to place the fields you want to include in the report.
Then click on the Report button (the third one from right) and select to Report the current time step.. a window...
Dear All,
I have searched this forums but couldn't find a thread that describes what am facing exactly so I started this one.
I have a pressurized piping network that is being fed from a pump station and a reservoir that is higher than most of the pipes of the network (the pumps are required...
That you all for your precious and immediate replies.
The 4 m³ of air in the 5 m³ tank is when the pump is running against 150 m head. I have requested another run using AFT impulse to compare its results with my software (Bentley Hammer) and am waiting for the results. I believe that they will...
Dear All,
I am designing a hydropneumatic tank (air vessel) to protect a water distribution network from pump trip (or power failure). The design operating point of the pumps is 150m head and only 25 lit/sec flow. This is mainly because of the hilly topography of the area and the low demands...
Dear All,
I am designing a sewage force main which is about 5 km length and 500mm diameter. The maximum flow is 440 l/s (raw sewage) for an operating pumping head of 60m. I want to model a transient scenario for pump station power failure followed by emergency startup of pumps. I am aiming to...
