Information about SF Pressure Drop for Excel




Help file

SF Pressure Drop 8.x for Excel calculates pressure drops of flowing liquids and gases in pipes (laminar and turbulent flow). It's also possible to calculate pressure changes caused by vertical difference of pipe and caused by changes of kinetic energy (dynamic pressure change).

SF Pressure Drop calculates also pressure drops in pipe elements (example: changes of direction) and in diverse fittings (valves, bellows etc.). A list of the calculable elements see below.
It's possible to combine diverse elements and so you will get total pressure drop.

To calculate pressure drop you need data of pipes (rougness) and data of flow medium (density, viscosity). These data are available in several databases. An additional possibility to save your own data is the user-defined database.

Data will output in Microsoft Excel, so is a installed Excel version (version 2007 or newer) necessary.

Further features

Database Standard Parts (EN/ISO/DIN/ASME/ANSI)

Dimensions and inner diameter of

Database of properties of liquids and gases and property calculation (density, viscosity)

Further calculation methods


SF Pressure Drop calculates the pressure drop of the following pipe elements:

Irreversible pressure drops (caused by friction, turbulences and flow separation)
Straight pipes Circular pipe, rectangular pipe, circular ring, channel, corrugated pipe, other forms
Pipe entrances Sharp edged entrance, rounded entrance, sharp edged entrance with angle, inward projecting pipe entrance
Changes of section Sudden and gradual enlargement, sudden and gradual contraction
Bends Circular bend, bend of segments, cast iron bend, rectangular bend, miter bend circular, miter bend rectangular
Brandings of current Tee sharp edged, tee globular, tee rounded bottom plain, tee globular neck rounded, branch flowing asunder, branch flowing together, y-pipe straight, y-pipe bent
Bellows Compensator corrugated tube, lyra-bend, u-bend
Valves Globe valve, globe valve y-pattern, angle valve, gate valve, cock, swing valve
Check valves Check valve globe lift, check valve y-pattern globe lift, check valve swing
Nozzles and orifices Orifice ISO 5167, orifice sharp-edged, orifice round-edged, orifice thick-edged, nozzle, long radius nozzle, venturi tube
Perforated plates Perforated plate thin circular, perforated plate thin rectangular, perforated plate thick circular, perforated plate thick rectangular
Strainers and grids Metal grid circular, metal grid rectangular, metal wire circular, metal wire rectangular, two-plane screen circular, two-plane screen rectangular, y-strainer, screen basket filter, conical strainer
Resistance coefficients Resistance coefficient of circular and rectangular pipes
Reversible pressure changes (caused by vertical differences of pipe and by changes of kinetic energy)
Reversible pressure changes Vertical difference, dynamic pressure change of circular and rectangular pipes


Windows XP/Vista/7/8


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