Estimate minimum internal port diameter for target flow/velocity/drop.
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Use the Pneumatic Port Size Calculator to estimate minimum internal port diameter for target flow/velocity/drop. The calculator uses Reference air flow, Upstream absolute pressure, Allowable pressure drop, Equivalent line length and Air temperature and reports minimum diameter/nominal size.
Read the result in the context of the selected units and pressure basis. For this tool, the primary outputs are minimum diameter/nominal size. Change one input at a time when comparing scenarios so the effect of each variable remains clear.
PneumaForge applies this verified method: Continuity + pressure-drop constraint. The functional engine is shared with related tools in the flow-diameter family, while this page solves the specific intent represented by pneumatic port size calculator.
Continuity + pressure-drop constraintReproducible example: start with the calculator's default values (Reference air flow = 500; Upstream absolute pressure = 7.01325; Allowable pressure drop = 0.2; Equivalent line length = 10) and calculate the result. Then change the variable most relevant to your application and compare the new minimum diameter/nominal size against the baseline.
Steady mean velocity. Internal area only. For compressible systems, line-condition Q changes with P,T.
It is designed to estimate minimum internal port diameter for target flow/velocity/drop. The reported outputs are minimum diameter/nominal size.
The calculator uses Reference air flow, Upstream absolute pressure, Allowable pressure drop, Equivalent line length and Air temperature. Only use values that represent the same operating condition or design case.
The calculation follows: Continuity + pressure-drop constraint. The page also states the assumptions that define where the method is valid.
Steady mean velocity. Internal area only. For compressible systems, line-condition Q changes with P,T.
Yes. PneumaForge converts supported units through canonical engineering units. For compressed-air reference flows and pressure bases, the reference pressure and temperature must also remain consistent.