INDUSTRIAL SILENCERS
| 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 |
Where: