Gas Restriction Orifice Calculator
This calculator determines flow parameters for gas restriction orifices based on Crane Technical Paper equations.
Mass Flow: w = 0.00282743 * C * Y * d² * √(2 * ΔP * ρ₁)
Yellow fields are inputs. Outputs are calculated using Crane coefficients and equations.
Input Parameters
Calculation Results
Bore ID (d1) (mm)
10.82
Inlet Pressure (bar a)
43.01
ΔP/P₁ Ratio
0.5673
Mass Flow Rate (kg/h)
2424.30
Volumetric Flow (am³/h)
62.8
Gas Flow (mmscfd)
2.28
Specific Heat Ratio (K)
1.39
Molecular Weight (MW)
21.35
Coefficient Information
Net Expansion Coefficient (Y): 0.84 (from Crane A-21)
Flow Coefficient (C): 0.635 (from Crane A-20)