Cargo Valve
critical
Known Models (2)
Brooksbank Valves (UK) Marine Cargo Valve
DN 50-500 mm
· Crude / Products / Chemicals
type: Marine Gate / Globe / Butterfly Valve
size_range: ['DN50', 'DN100', 'DN200', 'DN350', 'DN500']
variant_count_approx: 5
period_start_year: 1970
period_end_year: None
drive_type: Manual / Hydraulic / Pneumatic
construction: Cast steel, bronze, stainless steel
Common Failures:
- • Seat erosion
- • Stem packing leak
- • Body corrosion
- • Actuator failure
Service: Standard marine valve maintenance per Class requirements.
Spares: Brooksbank Valves (Sheffield, UK). Lead time: 3-6 weeks.
Nakakita Seisakusho (Japan) Marine Butterfly / Gate Valve
DN 50-600 mm, PN 10-40
· Crude Oil / Product Oil / Chemicals / Seawater
type: Marine Butterfly Valve / Gate Valve
size_range: ['DN50', 'DN100', 'DN200', 'DN350', 'DN500', 'DN600']
variant_count_approx: 6
period_start_year: 1960
period_end_year: None
drive_type: Manual / Hydraulic / Pneumatic / Electric Actuator
construction: Cast steel/stainless steel, PTFE/EPDM seat, marine-certified
Common Failures:
- • Seat wear causing leak after 10,000+ cycles
- • Actuator failure from corrosion/hydraulic leak
- • Stem packing leak
- • Body erosion from abrasive cargo
- • Disc (butterfly) edge erosion
Service: Seat leak test annually. Actuator function test quarterly. Stem packing adjustment annually. Body wall thickness measurement at drydock (5 years).
Spares: Nakakita (Osaka, Japan). Lead time: 3-5 weeks Asia. Standard valve bodies and seats.