Exhaust Valve Cages - Main Engine and Propulsion

An exhaust valve cage is a precision engine component that supports and locates the exhaust valve, seat, guide and related sealing parts. It is used in marine diesel cylinder heads or exhaust valve assemblies and may incorporate cooling-water passages.

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

Last updated: October 11, 2026

Product Information

Product Name	Exhaust Valve Cages
Product Category	Main Engine and Propulsion
Product Reference	297
Brands / Manufacturers	MAN Energy Solutions, Wärtsilä, WinGD
Unit of Measure	Piece

Key Features

Key Feature
1. Precision-machined valve and seat alignment surfaces
2. Designed for high exhaust-gas temperatures and cyclic loading
3. Cooling-water passages on applicable engine designs
4. Replaceable construction facilitates cylinder-head overhaul
5. Sealing interfaces prevent gas and cooling-water leakage

Applications of Exhaust Valve Cages

Application
1. Two-stroke marine main propulsion diesel engines
2. Four-stroke marine propulsion and auxiliary engines
3. Cylinder-head and exhaust valve assembly overhaul

Models & Manufacturers

Model	Manufacturer
MAN B&W ME-C series	MAN Energy Solutions
Wärtsilä 46 series	Wärtsilä
X-series	WinGD

Technical Specifications

Model	Specification	Value	Unit
MAN B&W ME-C series	Cooling arrangement	Water-cooled exhaust valve housing or cage, subject to engine variant	—
MAN B&W ME-C series	Fit	Engine bore and cylinder-cover variant specific	—
Wärtsilä 46 series	Function	Supports exhaust valve guide and seat components in the cylinder head	—
Wärtsilä 46 series	Cooling arrangement	Cooling-water circulation around thermally loaded areas	—
X-series	Construction	Precision-machined exhaust valve assembly component	—
X-series	Selection requirement	Must match engine type, bore, mark number and OEM part number	—

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	Manufacture, materials, dimensional tolerances and pressure testing are governed primarily by the engine maker's drawings and specifications. Material certificates and traceability may be required under applicable IACS classification rules and the approved engine design.
Class Approval	Critical exhaust valve components may require inspection, material traceability or survey acceptance by the vessel's classification society, such as DNV, ABS, Lloyd's Register, Bureau Veritas or ClassNK. Approval depends on the engine design, supplier and vessel class requirements.

Installation, Maintenance & Safety Information

Installation Notes	Confirm the engine type, bore, cylinder number, mark number and OEM part number. Clean and inspect all mating surfaces, renew specified seals, verify cooling passages, and follow OEM tightening, fitting-clearance and pressure-test procedures.
Maintenance Tips	Inspect for hot-gas erosion, cracking, corrosion, seat recession, guide wear and cooling-passage deposits. Check sealing faces and dimensions against OEM limits, renew seals during overhaul, and conduct leakage or pressure testing where specified.
Safety Notes	Stop and isolate the engine, engage turning-gear interlocks, shut off starting air, depressurize hydraulic systems and drain cooling water before removal. Use certified lifting equipment and follow OEM precautions for heavy components and hot surfaces.