Wärtsilä 31DF Marine Engine
Engine Summary
Engine Information
Engine Family: Wärtsilä 31DF
Engine Type: Dual Fuel Engine
Description
The Wärtsilä 31DF engine is a next‑generation dual‑fuel marine engine engineered to deliver exceptional efficiency, ultra‑low emissions, and reliable performance across a wide range of vessel types. Designed for operators seeking maximum fuel flexibility and long‑term lifecycle value, the Wärtsilä 31DF sets a new industry benchmark for medium‑speed propulsion systems.
With its advanced dual‑fuel capability, the engine operates seamlessly on LNG, MDO, or HFO, enabling shipowners to meet stringent global emission regulations while maintaining optimal performance. The 31DF’s class‑leading thermal efficiency, intelligent automation, and modular design make it one of the most efficient and future‑ready engines in the marine sector.
Engineered for demanding marine environments, the Wärtsilä 31DF provides stable operation across all load ranges, reduced fuel consumption, and extended maintenance intervals. Its robust construction and advanced control systems ensure reliable operation for ferries, offshore vessels, cruise ships, and auxiliary power applications.
Compatible Filters
No filters have been added for this engine yet.
Specifications
Dimensions & Weight
Compliance
Accessories
Standard Accessories
- Baseframe — Rigid engine baseframe with integrated mounting points
- Lube Oil Pump — Engine‑driven lubrication pump for continuous oil circulation
- Fuel Oil Pump — Integrated pump for liquid fuel supply
- Jacket Water Pump — Engine‑driven HT cooling water pump
- Charge Air Cooler — High‑efficiency cooler for optimized combustion air temperature
- Turbocharger — High‑performance turbocharger matched to engine load profile
- Air Filter — Standard intake air filtration system
- Exhaust Gas Manifold — Water‑cooled exhaust manifold for safe thermal management
- Starting Air Distributor — Integrated pneumatic starting system components
- Pilot Fuel System — Standard pilot‑fuel injection equipment for dual‑fuel operation
- Engine Control Unit (ECU) — Wärtsilä UNIC‑based control and monitoring system
- Wiring & Sensor Package — Factory‑installed sensors and cabling for engine monitoring
- Crankcase Ventilation System — Closed‑circuit ventilation for safe and clean operation
- Safety & Shutdown Devices — Standard protection systems for overspeed, low oil pressure, and high temperature
- Flexible Coupling — Standard coupling for propulsion or generator applications
Optional Accessories
- Additional Fuel Gas Supply Modules — Extra LNG handling and conditioning components
- Auxiliary Cooling Units — Supplemental LT/HT cooling capacity for demanding environments
- Heavy‑Duty Air Intake System — Enhanced filtration for offshore or dusty conditions
- Exhaust Silencer — Noise‑reduction solutions for passenger or port‑sensitive operations
- Pre‑Lubrication Pump — Ensures optimal lubrication before engine start
- Fuel Oil Separator — Additional purification for liquid fuel systems
- Lube Oil Separator — Extended oil life through continuous cleaning
- Hydraulic Starting System — Alternative or redundant starting method
- Remote Control Panel — Additional operator interface for bridge or ECR
- Advanced Vibration Dampers — Reduced structural vibration and noise
- Engine Room Monitoring Package — Expanded sensor suite for enhanced diagnostics
- Fuel Valve Heating System — For optimized operation with heavy fuel oils
- Water Mist Fire Protection — Engine‑mounted fire suppression system
- Custom Exhaust Piping — Tailored exhaust routing for vessel‑specific layouts
- Flexible Mounting Kits — Vibration‑isolated mounting solutions
Warranty
Additional Notes
Additional Notes — Technical data may vary depending on engine configuration, operating profile, and classification requirements; final specifications are confirmed during project engineering