Relief Valve Sizing Calculator

Fluid Type

Required Flow (lb/hr)

Set Pressure (psig)

Back Pressure (psia)

Overpressure (%)

Gas Selection

Relieving Temp (°F)

Molecular Weight

Cp/Cv (k)

Compressibility (Z)

Kd (Discharge)

Gas: 0.975, Liquid: 0.65

Kb (Back Pressure)

Kc (Rupture Disk)

No disk: 1.0, With disk: 0.9

Enter process conditions and click Calculate to size the relief valve.