Safety relief valves sizing in vapor services

Input(s)

C: Specific Heat Ratio (dimensionless)

$\mathrm{K}_{\mathrm{o}}$: Valve Discharge Coefficient (dimensionless)

A: Effective Discharge Area (in. ${ }^{2}$ )

B: Conversion constant (dimensionless)

P: Upstream Relieving Pressure (psi)

M: Gas Molecular Weight (dimensionless)

Z: Compressibility Factor (dimensionless)

$\mathrm{T}$: Inlet Temperature (R)

Output(s)

w: Weight Flow Through Valve (lb/h)

Formula(s)

Reference(s)

John M. Campbell, Gas Conditioning and Processing, Campbell Petroleum Series, Oklahoma, 1992, Vol. 1, Page: 296.