Pressure/Vacuum Relief Valve (PV Valve) · PV Valves & Vent Systems
Every value below comes from the manufacturer datasheet or class-society record on file for this model.
Other models of the same equipment type, Emerson Marine first.
What our service work and the manufacturer documentation say about keeping this model running.
Inspect valve body, seat, pallet or spring mechanism, weather cap, flame-protection parts and drain paths for corrosion, deposits and free movement. Keep vents free of paint and cargo residue and do not add unapproved screens or covers. Function-test opening and reseating using the approved workshop or onboard method. Check heating or anti-icing arrangements where fitted. Verify the valve remains matched to the approved cargo-tank vent system after replacement. Refer to the manufacturer documentation for the exact figure for opening pressure, vacuum setting, test flow and service limits.
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