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Arrow is the most powerful and accurate compressed gas & steam flow software on the market.
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Properly handles real gases, full heat transfer effects, and sonic choking and eliminates uncertainty in predictions by accounting for full compressible flow effects
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Streamline your input by changing massive amounts of information at once with Global Editing and importing input changes from Excel
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Clearly report your results by overlaying your input & output data onto the graphical model as well as through sophisticated graphs and profile plots






To replace old excel calculations that were difficult to follow, tedious, and prone to mistakes; We re-modeled the system to ensure the next engineer could easily understand and make modifications to calculate any new system parameters.”
Not just another tool – Here’s why it matters
Arrow accurately models compressible gas systems, including real gas behavior, making it ideal for high‑velocity and high‑pressure applications.
Determine critical (choked) flow conditions, Mach numbers, and pressure drops, helping engineers avoid flow restrictions and inefficiencies.
Users can create and analyze multiple what‑if operating scenarios within a single model, simplifying system optimization and contingency planning.
Use color‑coded system maps, detailed flow and pressure results, and automated reports to quickly identify performance issues and document designs.
Trusted software and focused expertise for lasting business improvement
