SF Pressure Drop for Windows:
What's new in version 7.x?

New in version 7.20

New in version 7.11/7.12:

New in version 7.0:

Calculation table

Printing of the table

Chart Pressure drop = f (rate of flow)

Improved calculation of gases


Properties of liquids and gases


Pipe elements

New in version 6.260:

Improved calculation of air properties
Calculation of real gas properties of dry and humid air within a wide temperature and pressure range (gaseous and liquid state and saturation state).

Calculation of liquid refrigerants
Calculation of properties of liquid refrigerants (Glycol, Glycerol, Ethanol...) at different temperatures and concentrations.

Enlargement of the circular pipe database with several EN, ISO and DIN standards.

Option to check for program upgrades when starting the software and automatic installation of upgrades.

New in version 6.25:

New element "Dynamic pressure change"

In enlarging or contracting pipes the following pressure changes are existing:

1. Pressure drop caused by friction, turbulences and flow separation:
dP = resistance coefficient x density/2 x velocity˛

2. Pressure change caused by changes of kinetic energy acc. Bernoulli formula:
dP = density * (velocity1˛ - velocity2˛)/2.
For enlargements the pressure change is positiv, for contractions negativ.

The element "Dyn. pressure change" calculates the static pressure changes caused by changes of kinetic energy. Normally you input the dimension of begin and end of the whole pipe.

Attention: The calculated data are output as pressure drop, i.e. if the output is negativ the pressure is encreasing, if the output is positiv the pressure is decreasing.

In previous program versions (< version 6.25) these pressure changes were calculated in combination with pipe enlargements and contractions.

New in version 6.2:

More pipe elements

The following pipe elements you can calculate with the new version additionally:

More properties of liquids and gases

More parts in the database "Standard Parts"

Dimensions and inner diameter according EN/ISO/DIN/ASME/ANSI) of

Preciser calculation methods

For the following elements we use preciser formulas now:

Further calculation methods

Better display and printout of results

Miscellaneous improvements and extensions

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