Tankerman · Equipment — P/V Breaker
The pressure/vacuum (P/V) breaker on the inert-gas main provides:
- AFull-flow over- and under-pressure protection for the cargo tanks as a last-resort liquid-seal device✓ Correct
- BCargo heating
- CBilge pumping
- DMooring tension
Explanation
The P/V breaker is a liquid-filled (often glycol/water) safety device on the IG main that blows through to atmosphere if tank pressure rises too high, or lets air in if a damaging vacuum develops — a full-flow backstop protecting the tanks if the P/V valves or IG controls fail.
Authority: SOLAS II-2; IG system references
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