Chemical Properties Databases for Liquids & Gases


Chempak data can be accessed directly from AFT programs, through Excel or a Chempak "Viewer".

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Chempak provides a property database of up to 700 fluids and mixing capability to AFT Arrow, AFT Fathom and AFT Mercury. AFT Chempak Viewer allows the Chempak database to be used as a stand alone application while AFT Chempak Add-in makes the database information accessible within Microsoft Excel spreadsheets.


Traditionally obtained from printed references, fluid properties are frequently needed for activities requiring more dynamic data. Using the technology of the acclaimed ChempakTM thermo-physical property database, AFT now brings the engineering and scientific communities three products that make fluid property data availability as dynamic as their analyses:
  • Chempak Property Database
  • Chempak Viewer
  • Chempak Add-in (for ExcelTM)

Available individually or as Chempak Suite, encompassing all three, and as Chempak Plus, including Chempak Viewer and Chempak Add-in.

Chempak Property Database
The Chempak Property database provides comprehensive thermo-physical properties on a wide range of fluids to AFT's pipe flow modeling software and to Chempak Viewer and Chempak Add-in.

For incompressible pipe flow analysis, the Chempak Property Database provides ~700 fluids to AFT FathomTM along with the ability to assemble non-reacting pre-mixtures. For compressible flow analysis, data on ~600 gases is available to AFT ArrowTM along with the capability to both assemble pre-mixtures and analyze dynamic mixing resulting from intersecting flow streams.

With fluids listed by up to three commonly used names, the formula and chemical structure, and able to sort on any of these identifiers, finding a specific fluid from the large number available is a quick and easy proposition.

Chempak Viewer
A powerful, easy-to-use interface, Chempak Viewer lets you access the Chempak Property Database as a stand-alone application. Select any of the over 700 fluids contained in the database or assemble non-reacting mixtures on a mass or mole basis. Fluid or mixture properties may be calculated for any combination of the available input parameters, either as a single point input or a range of inputs.

Chempak Viewer Input Parameters Available

  • Density
  • Enthalpy
  • Entropy
  • Internal Energy
  • Pressure
  • Quality
  • Saturated Liquid
  • Saturated Vapor
  • Specific Volume
  • Temperature

Output Control provides ready selection of output parameters to display, their order and units. Units may also be changed 'on the fly' by double-clicking on an output column header. Full control over the units appearing in selection lists is available through Unit Preferences, which also provides unit definitions and saving of preferences to file. Fluid and mixture sets may be saved for quick recall though the Recent Fluids list. A user specified name may be defined for any fluid or mixture and appears along with the standard Chempak name.

Tabular output may be printed or exported for import to a spreadsheet for presentation or secondary calculations. Alternatively, a selected portion of the output may be copied directly to the Windows clipboard and pasted into a spreadsheet.

Graphical output of a wide variety of parameters are available with Chempak Viewer's Graph Properties. Customization options include full control over colors, fonts, labels, markers and line formats, and a selection of 2D or 3D graph styles. Graphs may be printed or saved as a bitmap or Windows metafile for importing into other documents.

Chempak Add-in (for ExcelTM)
In conjunction with Chempak Property Database, Chempak Add-in lets you directly access Chempak fluid property functions from within a Microsoft Excel spreadsheet. Your spreadsheet based calculations can now have comprehensive and highly accurate fluid properties imbedded as a dynamic part of your analysis.

Chempak functions may be selected with Paste Function or directly entered as you would with any Excel function. Selection of fluids, assembling mixtures and setting unit preferences are all available from the Chempak menu, as well as a comprehensive online guide.

The potential applications of Chempak Add-in are as limitless as a spreadsheet.

Fluid Properties Available from Chempak Viewer & Chempak Add-in
  • Bulk Modulus of Elasticity
  • Compressibility Factor
  • Critical Pressure
  • Critical Temperature
  • Density
  • Enthalpy
  • Entropy
  • Internal Energy
  • Isentropic Expansion Coef., Gamma
  • Kinematic Viscosity
  • Molecular Weight
  • Phase
  • Prandtl Number
  • Pressure
  • Quality
  • Saturation Pressure
  • Saturation Temperature
  • Sonic Velocity
  • Specific Heat, cp
  • Specific Heat, cv
  • Specific Volume
  • Surface Tension
  • Temp. Superheat/Subcooled
  • Temperature
  • Thermal Conductivity
  • Viscosity
  • Volume Expansivity
Chempak Viewer, Chempak Add-in and Chempak Plus require Chempak Property Database. Chempak Property Database requires at least one of the following; AFT Arrow, AFT Fathom, AFT Mercury, Chempak Viewer or Chempak Add-in.


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