<\/p>\nFrom Haestad Methods web site:<\/p>\n
HAMMER from Haestad Methods demystifies the complex science of water hammer and transient analysis and puts the power to perform this critical work in your hands. With HAMMER, you can build your network from scratch using simple drag-and-drop layout tools. You can also interface seamlessly with EPANet, WaterCAD, WaterGEMS, and other hydraulic models to streamline the model-building process.<\/p>\n
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Model Any Transient Event<\/strong> Protective devices<\/em> Control Strategies<\/em> Surge Hydraulic Elements<\/strong> Reservoir
\nHAMMER allows you to quickly set up and model any transient initiator. Simulate pump trips or emergency shutdowns, pump restarts, sudden valve operations, rapid operation of wicket gates, turbine load shedding, rapid changes in demand, pipe bursts, and cyclic\/periodic changes in head or flow.<\/p>\n
\nSurge Protection Equipment<\/strong>
\nHAMMER contains the most comprehensive suite of surge control devices. The user can select from over 20 devices and perform an unlimited number of operating scenarios to develop the most appropriate strategy for surge mitigation.<\/p>\n
\nSurge tank (open, spilling, one-way, orifice, bladder, variable area, differential)
\nGas vessel (air chamber)
\nCheck valve\u05d2\u20ac\u201dmechanical or electrical control
\nPressure-relief valve
\nStation-bypass line with check valve
\nInline bypass with check valve
\nAir-inlet (vacuum breaker) valve
\nAir valve single, double, and triple acting
\nAir valve slow closing
\nCombined air valve
\nHydraulically controlled slow-closing air valve
\nSurge-anticipator valve
\nRupture disk <\/p>\n
\nIncreased pump\/turbine inertia
\nRealignment of pipe route and profile
\nPump\/turbine operating schedules
\nValve operation strategy <\/p>\n
\nHAMMER contains all the commonly used hydraulic elements found in pipeline systems. And for the uncommon ones the user can easily develop a user-defined element.<\/p>\n
\nPumps (4 quadrant)
\nPump shut down after delay
\nVariable speed pump
\nTurbine
\nPressure regulating valve
\nFlow sustaining valve
\nPressure supplier
\nSprinkler
\nCheck valve
\nGate valve
\nGlobe valve
\n Butterfly valve
\nNeedle Valve
\nBall Valve
\nUser Defined Valve
\nAir valve single, double, and triple acting
\nAir valve slow closing
\nDischarge to Atmosphere
\nDead end
\nConstant Flow Draw-Off
\nPeriodic Head\/Flow <\/p>\n