• Pump Startup - VSP Type - Can you configure a pump to have multiple VSP types?

    Is it possible to configure a pump to have multiple VSP types? Ideally, we want to use the [Pattern Based] VSP Type up to a point and then switch to [Fixed Flow] VSP Type. If not, is there any workaround for the following real-life scenario? We…
  • [OpenFlows HAMMER] - Pumps in parallel failure scenarios

    Hi I want to analyze failure scenarios for 2 pumps in parallel in HAMMER. Therefore I´d like to ask how could I set the following scenarios: 1-) Sudden and simultaneous pumps Start-up (sudden change in flow). 2-) Sudden and simultaneous pumps…
  • HELP! HELP!! Why the pressure increased so much during pump stratup condition?

    Hi guys. I have a very frustrating problems, i try a lot , and can not slove it . Wish any friend can help me.. a) It is a pump station with 3 on duty pumps. the rated flow of pump is 9.53m3/s and rated head is 75m. the topological structure is…
  • Open operation (One Pump running and second pump starts 60 sec delay)

    Dear Team, I have a scenario, in which one pump is running and seconds pumps start 60 sec later. I have not considered the pump tripping and i need know will there be any pressure variation during the starting of second pump. When i run the analysis…
  • Re: Hammer Pump Startup - Stabilised Flow Conditions

    Hello, I assume you're using HAMMER V8i. Assuming no data input errors, there are several things that could cause this difference. For example: 1) If you have any valves (GPV, TCV, PBV, FCV, PRV, PSV) that are active in the initial conditions…
  • Re: Pump start simulation at Hammer v8XM

    Under the main Haestad Methods product Technotes and FAQs page, check the "HAMMER V8 XM" section. You will see a similar Technote describing how to model a pump startup in V8 XM. Note that I recommend upgrading to V8i since the process is easier. …