Nozzle Rings - Main Engine and Propulsion

A nozzle ring is a stationary turbine guide-vane assembly in a marine diesel engine turbocharger. It directs exhaust gas onto the turbine wheel at the designed angle and velocity, supporting turbocharger efficiency, scavenge-air pressure and engine performance.

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

Last updated: October 11, 2026

Product Information

Product Name	Nozzle Rings
Product Category	Main Engine and Propulsion
Product Reference	25
Brands / Manufacturers	Accelleron, MAN Energy Solutions, Mitsubishi Heavy Industries
Unit of Measure	Piece

Key Features

Key Feature
1. High-temperature and corrosion-resistant alloy construction
2. Precisely profiled stationary guide vanes
3. Controls exhaust-gas direction and velocity
4. Matched to a specific turbocharger frame and turbine geometry
5. Replaceable during turbocharger overhaul

Applications of Nozzle Rings

Application
1. Main propulsion diesel engine turbochargers
2. Auxiliary marine diesel engine turbochargers
3. Turbocharger overhaul and exhaust-gas path repair

Models & Manufacturers

Model	Manufacturer
VTR Series	Accelleron
TPL Series	Accelleron
A100-L Series	Accelleron
TCA Series	MAN Energy Solutions
MET-MA Series	Mitsubishi Heavy Industries

Technical Specifications

Model	Specification	Value	Unit
VTR Series	Compatibility	Turbocharger frame and turbine specification specific	—
TPL Series	Component type	Fixed turbine nozzle guide-vane ring	—
A100-L Series	Installation location	Upstream of turbocharger turbine wheel	—
TCA Series	Operating medium	Diesel-engine exhaust gas	—
MET-MA Series	Selection requirement	Match OEM part number, turbocharger serial number and nozzle specification	—

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	No universal standalone certification applies to every nozzle ring. Manufacture, material, dimensions and inspection should comply with the turbocharger OEM drawing, engine technical file and applicable marine class rules. Material certificates and dimensional inspection records may be required.
Class Approval	Acceptance may be subject to the vessel's classification society, including DNV, ABS, Lloyd's Register, Bureau Veritas or ClassNK. Approval normally depends on OEM compatibility, material traceability, repair scope and class survey requirements rather than separate type approval of the ring.

Installation, Maintenance & Safety Information

Installation Notes	Confirm the turbocharger model, serial number, turbine specification and OEM part number. Clean mating surfaces, inspect the gas casing, verify ring orientation and clearances, and tighten fasteners to the OEM sequence and torque. Renew specified seals and locking devices.
Maintenance Tips	Inspect for erosion, burning, cracking, distortion and carbon deposits during overhaul. Clean only by OEM-approved methods, measure critical dimensions and vane condition, and replace the ring if wear or damage exceeds prescribed limits.
Safety Notes	Isolate the engine, prevent starting, shut off starting air and allow the turbocharger to cool before work. Exhaust components may remain hot and contaminated with soot. Use suitable lifting equipment and never operate with incorrect clearances, loose fasteners or damaged vanes.