Restriction Orifice Calculator
Input Parameters
mm
mm
Kg/s
bar a
Kg/m³
cP
kappa
Pressure Drop (DP)
Outlet Pressure (P2)
Intermediate Parameters
| DP/P1 | |
| P2/P1 | |
| ReD | |
| Regime | |
| Beta (β) | |
| C | |
| Epsilon (ε) |
Limits (ISO 5167)
Calculations are based on the ISO 5167 standard. The primary relationship between mass flow (qm) and pressure drop (DP) is:
qm = C * ε * (π/4 * d²) * sqrt(2 * ρ * DP)
This calculator iteratively solves this equation to find the pressure drop by calculating the Discharge Coefficient (C) and Expansion Factor (ε).
