V= Pressurized Volume (ft3)
A= Effective Area in Square Inches (Valve or Orifice Throat Area x Flow Coefficient). Use 0.85 Flow Coefficient unless known.
SG= Specific Gravity of Gas
Z= Compressibility Factor (at initial Pressure)
Ta= Initial Temperature (˚R)
Pa= Initial Pressure (psia)
Patm= Atmospheric Pressure (psia)
Natural Logarithm or Loge

Pressurized Volume-Blowdown Time Calculation​

INDUSTRIAL SILENCERS

Where: