Calculate pneumatic component flow using sonic conductance and critical pressure ratio.
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Use the ISO 6358 Pneumatic Flow Calculator to calculate pneumatic component flow using sonic conductance and critical pressure ratio. The calculator uses Sonic conductance C, Critical pressure ratio b, Upstream absolute pressure, Downstream absolute pressure and Air temperature and reports mass/reference flow; choked/subsonic state.
Read the result in the context of the selected units and pressure basis. For this tool, the primary outputs are mass/reference flow; choked/subsonic state. Change one input at a time when comparing scenarios so the effect of each variable remains clear.
PneumaForge applies this verified method: ISO 6358 compressible-flow characteristic method. The functional engine is shared with related tools in the iso6358-flow family, while this page solves the specific intent represented by ISO 6358 flow calculator.
ISO 6358 compressible-flow characteristic methodReproducible example: start with the calculator's default values (Sonic conductance C = 2; Critical pressure ratio b = 0.3; Upstream absolute pressure = 7.01325; Downstream absolute pressure = 1.01325) and calculate the result. Then change the variable most relevant to your application and compare the new mass/reference flow; choked/subsonic state against the baseline.
P₁,P₂ stagnation absolute pressures. C,b,m are measured/component data. ISO 6358-1 exclusions (e.g. regulators with internal feedback) are enforced.
It is designed to calculate pneumatic component flow using sonic conductance and critical pressure ratio. The reported outputs are mass/reference flow; choked/subsonic state.
The calculator uses Sonic conductance C, Critical pressure ratio b, Upstream absolute pressure, Downstream absolute pressure and Air temperature. Only use values that represent the same operating condition or design case.
The calculation follows: ISO 6358 compressible-flow characteristic method. The page also states the assumptions that define where the method is valid.
P₁,P₂ stagnation absolute pressures. C,b,m are measured/component data. ISO 6358-1 exclusions (e.g. regulators with internal feedback) are enforced.
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.