Exhaust Valves - Main Engine and Propulsion

Exhaust valves control the discharge of combustion gases from marine propulsion-engine cylinders. Assemblies typically include a heat-resistant spindle, valve seat, guide, housing and hydraulic, pneumatic or mechanical operating components.

ProShipWorks provides end-to-end support to source and supply Exhaust Valves for marine vessels, ship operators, industrial facilities, maintenance teams and procurement departments.

Last updated: October 11, 2026

Product Information

Product Name	Exhaust Valves
Product Category	Main Engine and Propulsion
Product Reference	14
Brands / Manufacturers	MAN B&W, WinGD, Japan Engine Corporation
Unit of Measure	Piece or complete assembly

Key Features

Key Feature
1. Heat-resistant spindle and seat materials for high-temperature exhaust service
2. Gas-tight seating to maintain cylinder compression and combustion efficiency
3. Replaceable or reconditionable spindle, seat and guide components
4. Actuation system synchronized with engine timing
5. Designed for repeated thermal and mechanical loading

Applications of Exhaust Valves

Application
1. Exhaust-gas control in low-speed two-stroke main propulsion engines
2. Cylinder-head exhaust service in medium-speed four-stroke propulsion engines
3. Replacement during engine overhaul, valve burning, seat leakage or spindle wear

Models & Manufacturers

Model	Manufacturer
S60ME-C Exhaust Valve	MAN Energy Solutions
G80ME-C Exhaust Valve	MAN Energy Solutions
X62 Exhaust Valve	WinGD
UEC60LSII Exhaust Valve	Japan Engine Corporation

Technical Specifications

Model	Specification	Value	Unit
S60ME-C Exhaust Valve	Engine type	Low-speed two-stroke crosshead engine	—
S60ME-C Exhaust Valve	Typical operation	Hydraulic opening with pneumatic air-spring closing	—
G80ME-C Exhaust Valve	Engine type	Low-speed two-stroke crosshead engine	—
X62 Exhaust Valve	Engine type	Low-speed two-stroke crosshead engine	—
UEC60LSII Exhaust Valve	Engine type	Low-speed two-stroke crosshead engine	—

Standards, Certifications & Class Approval

Review the available standards and approval information relevant to the product. Actual certification, material traceability, inspection and classification requirements depend on the product type, intended application and purchasing specification.

Applicable Standards & Certification	Dimensions, materials, clearances and test requirements are engine-OEM and model specific. Applicable engine installations generally follow ISO 3046 requirements and the machinery rules of the vessel's classification society; replacement parts should meet the approved engine specification.
Class Approval	Accepted as part of the class-approved engine design by societies such as DNV, ABS, Lloyd's Register, Bureau Veritas and ClassNK. Certification requirements for replacement valves depend on vessel class, engine criticality and the society's rules.

Installation, Maintenance & Safety Information

Installation Notes	Confirm engine type, cylinder bore, drawing number and valve revision. Clean mating faces, verify seat contact and spindle movement, renew specified seals, and apply OEM tightening torques, clearances, timing and hydraulic or air-spring settings.
Maintenance Tips	Inspect for seat burning, gas leakage, spindle cracking, stem wear, deposits and guide clearance. Check actuator oil leakage and air-spring pressure where fitted. Regrind or replace parts only within OEM limits and record operating hours.
Safety Notes	Stop and isolate the engine, close starting-air supplies, engage turning-gear interlocks and relieve hydraulic, pneumatic and cylinder pressure before removal. Allow components to cool and use certified lifting equipment for heavy valve assemblies.