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Parameter Category Specification (4-Stroke MAN Cylinder Head) Specification (2-Stroke MAN Cylinder Head) Engine Compatibility MAN B&W L21/31, L23/30, L27/38, L/V32/40, V28/32 series MAN B&W S35MC,S42MC,S50MC, S60ME, G60ME, S70ME series Material High-grade cast iron (GG25/GGG40) or ductile iron High-grade cast iron (GGG50/GJV450) for high thermal load Structure Type Integral head with 2/4 valves per cylinder Single-valve head (exhaust valve only) with central bore Max Combustion Pressure Up to 180–200 bar Up to 200–220 bar Cooling System Integrated water jacket (internal cast passages) High-efficiency water jacket with optimized flow paths Key Components Intake/exhaust valve seats, injector bore, valve guides Exhaust valve seat, fuel injector housing, starting air valve seat Weight Range (Typical) 80–250 kg (medium-speed engines) 300–1500 kg (low-speed large-bore engines) Dimensions (Example) L21/31: 773 × 365 × 466 mm, 143 kg S60ME: Custom dimensions (engine-specific) Surface Treatment Anti-corrosion primer + high-temperature topcoat Heavy-duty anti-corrosion coating for harsh conditions Testing & Certification Pressure test, NDT (UT/MT), OEM acceptance, Class Society certified (DNV/ABS/LR) Hydrostatic pressure test, thermal fatigue test, NDT, Class Society certified Primary Application Marine auxiliary engines, medium-speed main propulsion, power generation Low-speed main propulsion engines for large container ships, tankers, bulk carriers
Cylinder head
| Parameter Category | Specification (4-Stroke MAN Cylinder Head) | Specification (2-Stroke MAN Cylinder Head) |
| Engine Compatibility | MAN B&W L21/31, L23/30, L27/38, L/V32/40, V28/32 series | MAN B&W S35MC,S42MC,S50MC, S60ME, G60ME, S70ME series |
| Material | High-grade cast iron (GG25/GGG40) or ductile iron | High-grade cast iron (GGG50/GJV450) for high thermal load |
| Structure Type | Integral head with 2/4 valves per cylinder | Single-valve head (exhaust valve only) with central bore |
| Max Combustion Pressure | Up to 180–200 bar | Up to 200–220 bar |
| Cooling System | Integrated water jacket (internal cast passages) | High-efficiency water jacket with optimized flow paths |
| Key Components | Intake/exhaust valve seats, injector bore, valve guides | Exhaust valve seat, fuel injector housing, starting air valve seat |
| Weight Range (Typical) | 80–250 kg (medium-speed engines) | 300–1500 kg (low-speed large-bore engines) |
| Dimensions (Example) | L21/31: 773 × 365 × 466 mm, 143 kg | S60ME: Custom dimensions (engine-specific) |
| Surface Treatment | Anti-corrosion primer + high-temperature topcoat | Heavy-duty anti-corrosion coating for harsh conditions |
| Testing & Certification | Pressure test, NDT (UT/MT), OEM acceptance, Class Society certified (DNV/ABS/LR) | Hydrostatic pressure test, thermal fatigue test, NDT, Class Society certified |
| Primary Application | Marine auxiliary engines, medium-speed main propulsion, power generation | Low-speed main propulsion engines for large container ships, tankers, bulk carriers |
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Factory: Port City Entrepreneurship Center, High tech Entrepreneurship Base, No. 85 Xigang North Road, Haigang District, Qinhuangdao City
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