Fire/Smoke Damper · Ventilation
Automatic Fail-Safe Marine Fire Damper (Deck): HYSF, HYDF and HYQF by Jiangsu Hongyu Marine Equipment Limited Company. DNV MED certificate MEDB000021C.
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| Closing function test | typically at each periodic fire safety inspection, commonly annual |
|---|---|
| Visual inspection of blade and frame | typically annual or at each survey |
| Lubrication of moving parts | per the maker's schedule, using approved lubricant |
| Seal and gasket condition check | annual or after any repair |
| Release mechanism test after maintenance | before returning the damper to service |
| Blade-to-frame gap when closed | must stay within the clearance stated in the approved drawing - confirm against the maker's documentation |
|---|---|
| Seal condition | renew when hardened, torn or missing |
| Corrosion of blade and frame | repair or renew where section loss affects integrity or movement |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Held under DNV MED certificate MEDB000021C as an IMO-approved fire damper. Surveyors typically confirm that dampers close reliably, that markings match the approval and that the fire control plan agrees with the installation; function-test records are commonly requested.
Estimated lifetime: Not applicable in running hours; a passive fire protection item inspected for condition and function, expected to last for the vessel's service life when maintained.
Verified against the DNV Approval Finder — the certificate below is issued by DNV, not by us.
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