Cargo Compressor (Gas Carrier)
critical
Known Models (3)
Burckhardt Compression (Switzerland) Laby-GI BOG Compressor
1,000-10,000 m³/h BOG
· Boil-Off Gas (LNG/LPG Cargo Vapor)
Voltage: 380-690V
type: Labyrinth Piston Compressor (Oil-Free, BOG)
size_range: ['Laby-GI 300', 'Laby-GI 500', 'Laby-GI 1000']
power_range_kw: [200, 3000]
variant_count_approx: 3
period_start_year: 2005
period_end_year: None
drive_type: Electric
construction: Labyrinth piston (oil-free), multi-stage, cryogenic-rated
Common Failures:
- • Labyrinth seal wear from piston rod misalignment
- • Valve plate fatigue on HP stages
- • Crosshead bearing wear after 20,000+ hrs
- • Crankshaft oil contamination
Service: Labyrinth seal inspection every 8,000 hrs. Valve overhaul every 6,000-8,000 hrs. Complete overhaul 24,000-30,000 hrs.
Spares: Burckhardt Compression (Winterthur). Lead time: 4-8 weeks. Service contracts recommended.
Mitsubishi Heavy Industries Compressor (Japan) MCO Cargo/BOG Compressor
1,000-8,000 m³/h
· BOG / LNG Vapor
Voltage: 380-690V
type: Centrifugal BOG Compressor
size_range: ['MCO-I', 'MCO-P']
power_range_kw: [500, 5000]
variant_count_approx: 2
period_start_year: 2010
period_end_year: None
drive_type: Electric (VFD)
construction: Centrifugal multi-stage, cryogenic, VFD-controlled
Common Failures:
- • Impeller erosion from cryogenic gas
- • Magnetic bearing controller failure (if magnetic)
- • Seal gas system failure
- • Surge control issues
Service: Per MHI Compressor schedule. Impeller inspection every 16,000 hrs. Seal gas system test quarterly.
Spares: MHI Compressor (Hiroshima). Lead time: 4-10 weeks.
Siad Macchine Impianti (Italy) LPG/Ethylene Cargo Compressor
500-5,000 m³/h
· LPG / Ethylene / Propylene Cargo Vapor
Voltage: 380-440V
type: Reciprocating Cargo Compressor (Semi-Pressurized Gas Carrier)
size_range: ['SIAD RC-500', 'SIAD RC-1000', 'SIAD RC-3000', 'SIAD RC-5000']
power_range_kw: [100, 1500]
variant_count_approx: 4
period_start_year: 1980
period_end_year: None
drive_type: Electric
construction: Reciprocating piston, oil-injected or oil-free, multi-stage, cryogenic-rated
Common Failures:
- • Piston ring wear from cryogenic conditions
- • Valve plate fatigue
- • Shaft seal failure (oil-injected models)
- • Suction strainer blockage
Service: Valve overhaul every 4,000-6,000 hrs. Piston ring replacement every 8,000-12,000 hrs. Oil analysis quarterly.
Spares: Siad (Bergamo, Italy). Lead time: 4-8 weeks.