04/03/2026
MAN 28/32H VALVE SPINDLES
MAN 28/32H Valve Spindles
Overview
MAN 28/32H valve spindles are precision-engineered core components for MAN B&W L28/32H four‑stroke marine and stationary diesel/gas engines. They control intake and exhaust gas flow, ensuring reliable combustion and power output.
Key Specifications
• Engine Compatibility: MAN L28/32H (inline) / V28/32H (vee) diesel/gas engines
• Types: Inlet valve spindle & Exhaust valve spindle
• Typical Part Numbers:
◦ Inlet: 60502‑21H‑12
◦ Exhaust: 60502‑18H‑3014
• Material: High‑grade heat‑resistant alloy steel (exhaust) / corrosion‑resistant steel (inlet)
• Design: Integral valve head and stem; precision‑ground for tight fit in valve guides
• Valve Rotator: Fitted with a valve rotator to rotate the spindle slightly on each opening, ensuring even wear and extended service life
Functional Features
• Precision Sealing: Matches replaceable heat‑resistant steel seat rings (water‑cooled) for optimal sealing and low operating temperatures
• Lubrication: Pressure‑feed lubricated via the engine’s centralized system; valve gear includes spring‑loaded valve bridges with adjustment screws for valve clearance
• Durability: Resists high thermal stress, corrosion, and mechanical fatigue under continuous heavy‑duty operation
Applications
• Marine auxiliary engines (generator sets)
• Land‑based power generation units
• Industrial diesel/gas engine systems
Maintenance & Replacement
• Standard overhaul interval: Aligned with MAN’s recommended service schedule
• Replacement requires proper valve clearance adjustment (typically 0.4 mm) and spring compression tools
• Compatible with genuine MAN spare parts: valve guides (60501‑19H‑029) and seat rings (60501‑13H‑028)
