New Features - Arrow

Arrow 9


  • The brand new Extended Time Simulation (XTS) Add-on Module models dynamic system behavior and how critical system parameters vary over time
  • Streamline your setup from the new Analysis Setup menu, a user-friendly workflow condensing multiple model-wide specification windows into 1
  • Warnings, errors and Design Alerts shown in the Output are now color coded and organized in a prioritized list for quick review
  • The Library Manager (previously the Database Manager) has been completely revised and now offers a consolidated way to use and customize libraries of fluids, pipe materials, junctions, etc.
  • Visually analyze alternatives with Multi-Scenario Graphing to compare profile graphs and transient plots (XTS) from multiple scenarios on a single plot


  • Use the NEW online Help System for centralized documentation and examples from your browser
  • Customize the display names for engineering units of measure to accommodate language or notation differences
  • Apply the Soave-Redlich-Kwong and the Peng-Robinson equations of state as additional methods to model your fluid


  • Model component-to-component connections with the new Zero Length Connector pipe option
  • Contextually update Junction Special Conditions directly from the toolbar
  • Reset Pipes and Junctions as ‘Same as Parent Scenario’ during specification from the Workspace menu


  • Design Alerts are grouped together on their own tab in the General Output section for easy identification
  • Spot concerns by reporting Warnings, Cautions and Design Alerts for each scenario in Multi-Scenario Output
  • Save time with enhanced Output window data loading speed


  • Batch runs of multiple scenarios now report the number of Warnings and Design Alerts in each scenario
  • Run batch runs “silently” in the background to minimize interruptions as each scenario completes
  • Search for text in Pipe and Junction Notes, useful for component specifications or intended operating conditions
  • Junctions which changed states during a run will be reported to the user, indicating check valve closures and control valve failures for example
  • Consider Heat Transfer parameters in the context of the system from Visual Report
  • Right-click a pipe or junction table row to quickly find the object on the Workspace

AFT Arrow XTS Module

  • Model transient events such as tank pressurizing and blowdown, changes in valve position, and changes to compressor operating condition
  • Animate transient output, visualizing how parameters change over time at a point or along a flow path


Arrow 8


  • Data can be compared between multiple scenarios to show changes made
  • Compression ratio can be used to define the compressor performance
  • Multi-level undo and redo on the Workspace
  • All Summary Output parameters can now be displayed on the Visual Report


  • Improved intelligence on when a model needs to be saved to preserve the output
  • Improved model loading speed
  • Improved language refresh speed
  • New and updated themes


  • Magnifier tool to quickly view objects on the Workspace
  • Allow pipe/junction editing while the Undefined Items panel is shown
  • Double-click on a junction on the Toolbox to add multiple to the Workspace (similar to pipes)
  • Ability to draw pipes off the grid when in isometric mode
  • Junction icons automatically rotate to align with pipes
  • Select shortest path between two junctions

Visual Report

  • Visual Report Control has been redesigned


  • Pipes can be joined together to form a single pipe
  • Heat tracing now allows the entry of power/length and number of turns


  • More intelligent Tee/Wye junction during input and Workspace movements
  • Built-in K values for bends with r/D between 0.5 and 1


  • Notes can be added to cells in the Output tables
  • Output Control parameters can be filtered by typing part of the parameter name
  • Thermal conductivity used in the heat transfer calculations is now displayed

Global Edit

  • Revised to improve usability
  • A pipe or junction can be selected as the base data to apply to other pipes or junctions
  • Notes can be globally edited on junctions


  • Ability to import custom Fittings & Losses from a comma-separated file
  • Design Alerts and can saved to and loaded from a comma-separated file
  • New Diagnostics window to help identify special features or options being used in the scenario


Arrow 7

  • General interface
    • Added general unit system, language, pipe material and other preferences to the Startup Control window with the ability to set these as the default
    • Clearer Excel import capabilities using keywords
    • Excel changes can be made to multiple scenarios at one time
    • Increased the loading speed for large models
    • Added option to add additional rows to the data tables (like Cv vs. Open Percent, etc.)
  • Model Import
    • Import from a Caesar II neutral file
    • Import from a Piping Component File (.pcf)
    • Import or export a EPANet file
  • Excel Export
    • Output can be exported using the new Excel Export Manager
    • Single values, columns, rows or entire output tables can be exported
    • Data from a Graph List item can be exported
    • Specific starting cells and target worksheets can be defined
    • Headers and units can be optionally included
    • Data can be exported automatically after the model is run
    • Export can be automatically done during a batch run of scenarios
  • Standards and Codes
    • New output area which shows codes and standards used in the modeling process
    • Standard references are updated to current versions where applicable
  • Pipes
    • Automatic calculation of free and forced external heat transfer coefficients for air and water
    • Buried pipe heat transfer
    • Heat tracing at the surface of the pipe
    • Intermediate pipe elevations can be entered as length from the pipe beginning
    • Added many EN and DIN pipe standards to the available pipe materials
    • Improved ability to select the pipe materials to be used in the model through the Database Manager
  • Junctions
    • Improved Relief Valve specification with opening and closing profiles
    • Ability to define a relief valve effective orifice based on API 526
    • Made fan, centrifugal and positive displacement compressor data entry clearer on the Compressor/Fan Property window
    • The preferred operating range (POR) and allowable operating range (AOR) can be entered for a compressor shown on the Compressor vs. System Curve
    • Ability to set Power or Efficiency as the default for pump curves
    • Ability to set default for Always Control Never Fail on Control Valves
    • Reference density for resistance curves
  • Workspace
    • Isometric grid drawing
    • The background opacity level can be changed for Annotations
    • Keyboard shortcuts to zoom and pan
    • Symbol to show pipes with Fittings & Losses
  • Output
    • Data can be exported to specific cells in an Excel Worksheet
    • Right-click on cell or column header to create a Design Alert, add to the Excel Export Manager, copy data, find on the Workspace, sort and change units
    • Design Alerts highlights on the summary tables
    • Data can be sorted by clicking on the column heading
    • Added additional heat transfer parameters
    • Output reports in Portuguese
  • Model Data
    • Added additional parameters such as insulation thickness
    • Right-click a pipe or junction to find the object on the Workspace
  • Visual Report
    • Better selection of image and data options
  • Fluids
    • New extensive NIST REFPROP fluid database included which supports pure fluids and mixtures

Arrow 6

  • General interface
    • Improved tab interface and enhanced Quick Access Panel functionality
    • Output reports in German and Chinese languages
    • Main menus are translated into available output languages
  • Graph results
    • Multiple Graphs can be added to Graph Folders for easy generation and display
    • Multiple graph tabs on main Graph tab
    • Multiple graphs tiled on the same Graph tab
    • Easy formatting of titles, axis labels, and plot lines
    • Plot series lines can be turned on/off for quick inspection
    • Graph controls now located on the Quick Access Panel for easy graph definition and changes
  • Scenario Manager
    • Ability to create child scenarios without results saving duplication and load time
  • Workspace
    • GIS shape files can be imported to create a model
    • Text alignment options in annotations
    • Annotations can be layered on the Workspace
  • Output
    • Results Diagrams which graphically show data for pipe heat transfer and compressors
    • Intermediate Axial Points calculations are shown for all pipes in a collapsible table
    • Default colors for multi-scenario output
  • Visual Report
    • Automatic Color Map generation
  • Pipes
    • Design Alerts are specified and named globally, then applied to pipes
  • Junctions
    • Volumetric flow rate set points can be used for Control Valves
    • Compressor/Fans compression ratio can be set
    • When the speed is set for a compressor/fan, both the original and modified curves are shown on the Compressor/Fan Property window
    • Forward velocity to close check valves
    • Design Alerts can be applied to junctions


Arrow 5

  • Completely redesigned user interface with tabbed window access and new transparent icons
  • Robust support for dual monitors
  • New Startup panel allows user to choose engineering unit system (U.S./metric) and specify default fluid
  • Improved printing features includes use of company logo, user comments and titles, as well as graphical borders on all printouts
  • New Quick Access Panel includes access to Scenario Manager
  • New mapping feature flyout allows birds-eye view of model and navigation
  • Improved navigation speed for large models with thousands of pipes and junctions
  • Annotations capability great improved now allows user's images to be inserted into the annotation
  • Fittings and losses can now have user "Favorites" which allows for much faster navigation to frequently used fittings
  • New Pipe Material Databases based directly on international pipe standards
  • Pipe data can be modified through an Excel file
  • GSC module: New and improved searching method for multi-variable goal seeking
  • GSC module: Pipes now have GSC variables available such as roughness, design factor, insulation thickness and Reynolds number

Arrow 4

  • New GSC module can automatically have parameters vary to meet specified goals
  • New equation of state feature to model density as a table of curve based on pressure and temperature (similar to the previous enthalpy table)
  • Can view output for multiple scenarios in Output at same time
  • Selected scenarios can be run automatically in batch mode
  • All printing can go directly to a PDF file
  • Compressor/fan data can be entered in terms of head as well as pressure
  • Display multiple instances of the same Output parameter with different units
  • Junction data can be modified through an Excel file
  • Can calculate compressor/fan energy usage and cost

Arrow 3

  • Built-in support for ASME steam properties
  • Two new solution methods which can greatly reduce run time
  • New Scenario Manager to keep variants of a model saved in a single file in a parent-child relationship of any number of levels
  • Enhanced heat transfer modeling including detailed pipe wall and insulation heat transfer
  • Enhanced compressor/fan features include efficiency and power usage, and multiple configurations depicting different impeller sizes and rotational speeds
  • Support for ANSI/ISA Cv loss coefficients for valves
  • Ability to save graphs for fast recall
  • Grid can be displayed on Workspace
  • Pipes can be displayed in visual segments to allow for easier routing of pipe connections
  • Significant improvements to compressor/fan vs. system curve generation
  • New ability to add annotations to Workspace and Visual Report
  • New option to directly input data for rectangular ducts
  • Solver results are saved with the model so that when a model is opened at a later time results can be displayed immediately
  • Ability to create named groups of pipes and junctions for easier data selection and reporting
  • An image or photo can be loaded into the background of the Workspace and a model can be built on the image
  • New morphing feature allows one junction to be morphed into another using drag-and-drop
  • New report in Output window Pipe section that relates detailed heat transfer information
  • New Renumber Wizard added
  • New Spray Discharge junction
  • New Separator junction

Arrow 2

  • New Chempak thermophysical database offers 600 gases
  • Support for user created mixtures and dynamic flow stream mixture calculations including species balance
  • Numerous Solver enhancements improve convergence and robustness for subsonic and sonic systems
  • Ability to model elevation changes and impact on pressure changes
  • Ability to model body forces and effects on gas pressure due to rotation (useful for turbomachinery)
  • Improved printing features include fit to multiple pages, printing selected pipes and junctions, horizontal and vertical centering, and setting margin sizes
  • Ability to model controlled flow or pressure on compressors and fans using VFDs or other speed control devices
  • User configurable choice of which engineering units are displayed in drop down unit selections
  • User selected preferences for each individual type of engineering unit
  • User specified design factors for pipes and junctions
  • Special Output window summary reports for compressor/fans, valves and heat exchangers
  • Compressors, fans, valves and other components can be turned on and off to evaluate different operating scenarios
  • New Select Special feature added which is a powerful selection tool that allows users to set specific criteria for selecting groups of pipe and/or junctions for editing or reporting
  • Ability to show pipe and junction names on the Workspace
  • Pipe can have graphical segments
  • Greatly expanded global editing for junctions
  • Notes can be kept for each individual pipe and junction
  • New tabbed folders on pipe and junction specifications windows
  • Model Data organization improved using tabbed folders
  • Output window organization improved using tabbed folders
  • Output window junction data separated into separate table for each junction type
  • Enhanced reporting on separate tabs for steady-state output
  • New Status Bar shows updated Checklist and ready light goes on when model is complete
  • New user specifiable design alerts feature to warn user when results exceed specified limits
  • Dockable and customizable toolbars, with many new toolbar icons
  • New Database Manager to ease creation of databases and to allow selective access to data
  • Fan vs. system curves can be plotted for complex, parallel systems
  • Visual Report units can be shown in a legend
  • New Color Map feature in Visual Report to show pipes with different results in different colors

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