Hitrans V2.1 is the last release of HiTrans (release October 2006). HiTrans is a numerical modelling software that helps designers to test fast and confidently their designs for pressurized pipelines systems to avoid the damaging effects caused by transients (or water hammer), and helps in choosing and sizing the protection devices. With HiTrans V2.1 Premium Edition you can solve pipelines composed uo to 100 different pipes and the following devices: Valves --------- Opening Valves Closign Valves Control Valves Pressure Relief Valves Fixed valves Check Valves Tanks ------- Constant leves tanks Surge Tank One Way Surge Tank (Feed tanks) And ----- Air Vessel (air chamber, surge alliviator) Pumps between two pipes (pumps with suction pipe) Flow derivations HiTrans V2 is Intuitive and easy to use: ----------------------------------------------- + Includes different estimators for unknow parameters To run HiTrans you just need to enter only these parameters + Total simulation time + Time Step + Minimum number of intervals to be discretized the limitant pipe (normally the minimum number of division for the shortest pipe in the system) HiTrans V2 internal algoritm will calculate all internal parameters to assure the solution's convergence and stability. For advanced users, is possible to see all internal calculations parameters.