Minimum total vent area of explosion-relief valves for a crankcase, per IACS UR M9.
Formula
$$ A_\text{relief} = \max(45, 115 \cdot V_\text{crank}) $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $V_\text{crank}$ | Crankcase gross volume | m³ | engine GA |
| $A_\text{relief}$ | Relief-valve area total | cm² | result |
Sources
- IACS UR M9.