YANMAR has developed SCR system that meets to IMO Tier 3 regulations, which require an 80%, i.e. big reduction in NOx compared with Tier 1. Making use of our original technology and wealth of experience, we have created a system whose design and functionality are optimized for marine vessels, and which is perfectly matched for use with diesel engines, both in ECA and non-ECA waters. In addition, repeated verification tests have been conducted on ocean-going vessels ( equipped with SCR system for 3 auxiliary engines ) to further improve the system.
SCR system developed in-house by YANMAR to meet to IMO Tier 3 NOx regulations
Highly Reliable and Exceptionally Durable - YANMAR’s Original SCR System
Maintaining highly NOx reduction performance whilst ensuring safety.
The by-pass branching section and catalytic reactor have been integrated into a single unit, achieving high-performance NOx reduction. Engines equipped with our SCR system is obtained NOx certification ( Scheme A ), whilst maintaining performance onboard. Additionally, a urea injection nozzle is installed downstream from the branching section, preventing ammonia from leaking into the by-pass line.
Automatic control for multiple engines.
Control unit integrates all devices including catalytic reactors mounted to each individual engine. A single pump unit and control panel can manage system for multiple engines, allowing the system to remain compact.
- [A] Soot blower
- [B] Urea injection nozzle
- [C] Service air
- [D] Separator
- [E] System control panel
- [F] Temperature and humidity sensor
- [G] Urea water tank
- [H] Control air
- [I] Pump unit
- [J] Nozzle unit
- [K] Relief valve of boost air
Note: Specifications may differ according to vessel classification.
Long lifetime of catalyst
Catalyst degradation occurs due to the flow small amounts of exhaust gas into the catalyst line when the by-pass is in operation. The unit to prevent it includes 2 types of outlet.
After-service for both engine and SCR system
We offer comprehensive engine and SCR system support, including periodic NOx ( reduction rate ) measurements as stipulated by the vessel c lassification s ociety r ules a nd maintenance.