Selective Catalytic Reduction (SCR) is an exhaust after-treatment technology used on marine diesel engines to reduce nitrogen oxide (NOx) emissions. By injecting a urea solution into the exhaust gas and passing it through a catalyst reactor, harmful NOx is converted into harmless nitrogen and water vapour before leaving the vessel's exhaust. SCR systems are widely used across the global fleet and can reduce NOx emissions by up to 90% while allowing the engine to operate efficiently.
SCR systems operate continuously as part of the vessel's emissions control strategy. Over time, factors such as catalyst ageing, incorrect urea dosing, deposits, or changes in engine operation can affect performance and reduce NOx reduction efficiency.
Because these changes often occur gradually, performance loss may not always be immediately visible through standard system indications. Vessels operating in IMO Tier III areas — including ECAs and regulated port zones — depend on verified, consistent SCR performance to remain compliant. Undetected degradation puts that compliance at risk.
With over 1,500 Manta-produced SCR systems delivered and installed worldwide (H+H & Yara branded), maintaining reliable performance for our customers throughout the systems operational life is central to what we do. We support our customers globally and can assist with service, troubleshooting, performance verification, and catalyst replacement for SCR reactors, also for other SCR system manufacturers.
Our services include:
Tightening emission regulations and evolving DNV verification standards are placing growing compliance and operational demands on vessel owners and operators. The Norwegian NOx Fund offers substantial financial incentives for documented emission reductions — but navigating the application process is often complex, resource-intensive, and documentation-heavy.
We make it straightforward.
Our NOx Fund Ready SCR Package combines certified SCR service expertise with documentation fully aligned to NOx Fund and DNV requirements. Designed for vessel owners seeking to maximise funding with minimal administrative burden, the package gives you a clear, compliant path from SCR installation or service to approved application.
Protect your SCR investment with a tailored service agreement. We work with you to define a maintenance schedule and support structure that fits your fleet's operational profile — delivering predictable annual costs, reduced unplanned downtime, and documented compliance readiness throughout the year.
Catalyst performance is critical to maintaining NOx reduction efficiency and meeting compliance requirements. Whether you operate our systems or equipment from other suppliers, we provide tailored catalyst solutions to match your needs.
What we offer:
When your SCR system needs hands-on attention, our certified SCR engineers come to you. We carry out scheduled maintenance, ad-hoc servicing, and fault rectification onboard — minimising off-hire time and ensuring your system is returned to full operational performance with complete service documentation. Genuine spare parts are available from our offices worldwide, with short lead times, for both our own systems and third-party SCR equipment.
SCR performance is not set-and-forget. Our engineers carry out detailed optimisation of SCR operating parameters to maximise NOx reduction efficiency, monitor catalyst condition, and fine-tune urea dosing to eliminate overconsumption. The result is a system running at peak efficiency — and lower operating costs.
Direct access to experienced SCR engineers, whenever you need it. Whether you are dealing with an active fault, a performance concern, or need operational guidance, our technical support team provides fast remote diagnostics and clear resolution — without going through a generic helpdesk.
Keep your SCR system current with the latest firmware, control software, and hardware upgrades. Updates address reliability improvements, cybersecurity requirements, and system efficiency gains. Staying up to date reduces the risk of software-related faults and ensures your system remains supported throughout its lifecycle.
Filip has a background in mechanical and electrical engineering and several years of hands-on experience from the North Sea offshore sector. Within Manta Marine Technologies, he has held positions as Commissioning Engineer and Fleet Manager, gaining a deep technical understanding of vessel systems and onboard operations. Earlier in his career, Filip was part of a technology start-up, an experience that strengthened his entrepreneurial mindset and problem-solving approach, qualities that continue to shape his work today. At Manta Marine Technologies, he now serves as Commercial Manager, focusing on business development and technical project sales across all product lines. His main market focus is Benelux, the UK, and Germany
Filip has a background in mechanical and electrical engineering and several years of hands-on experience from the North Sea offshore sector. Within Manta Marine Technologies, he has held positions as Commissioning Engineer and Fleet Manager, gaining a deep technical understanding of vessel systems and onboard operations. Earlier in his career, Filip was part of a technology start-up, an experience that strengthened his entrepreneurial mindset and problem-solving approach, qualities that continue to shape his work today. At Manta Marine Technologies, he now serves as Commercial Manager, focusing on business development and technical project sales across all product lines. His main market focus is Benelux, the UK, and Germany
