Green Valley Integrated SCR DeNOx System | All-in-One Compliance with EPA Tier4 Final & EU Stage V Emission Limits

Global export thresholds for off-road diesel-powered equipment keep tightening. US EPA Tier4 Final and EU Stage V have become mandatory access standards for generator sets, construction machinery, oilfield power units and IDC backup power supplies targeting European and American markets. Stringent near-zero emission limits are set for nitrogen oxides (NOₓ), particulate matter (PM) captured by particulate filters and ammonia slip. Integrated aftertreatment systems are faced with dual rigorous requirements regarding integrated design, low-temperature adaptability and long-term operational stability.

Conventional split denitrification equipment is plagued by common pain points including uneven ammonia injection, catalyst clogging, excessive ammonia slip and out-of-control operation under low-load conditions, making it difficult to obtain certifications for both US and European emission standards simultaneously. With years of dedicated research in diesel exhaust aftertreatment, Green Valley Environmental independently developed an integrated complete DOC+DPF+SCR+ASC denitrification system. Supported by three core technologies – full-process fluid simulation, low-temperature high-activity catalysts and closed-loop intelligent ammonia injection control – a single unit can comply with both Tier4 Final and Stage V standards. We provide compliant export solutions for full series diesel engine units from Cummins, MTU, Perkins and other brands, covering a wide range of scenarios including data centers, oilfields, construction machinery, biomass power generation and port backup power supplies.

Green Valley Environmental adopts an all-in-one integrated solution featuring high temperature resistance and corrosion resistance, compatible with engine units of various brands under diverse working conditions across multiple application scenarios. Customization is available upon demand, with support for horizontal, vertical and container-built installation configurations. Full certification supporting services are provided: we supply complete exhaust emission test technical documents, equipment drawings and performance reports to assist clients in completing EPA and EU Stage V emission type approval certifications.

Environmental supervision on global off-road diesel-powered equipment is growing increasingly stringent. Tier4 Final and Stage V compliance has become an essential prerequisite for overseas market entry. The compliance and stability of aftertreatment systems directly determine the market competitiveness of equipment abroad. Rooted in core integrated SCR denitrification technologies, Green Valley Environmental boasts a full industrial chain covering integrated system design, flow field simulation, intelligent electronic control injection and complete machine integration, delivering one-stop exhaust denitrification solutions eligible for dual-standard certification to power equipment manufacturers at home and overseas.

Green Valley Environmental will continuously upgrade ultra-low-temperature denitrification and intelligent monitoring technologies to help all types of diesel-powered equipment meet emission regulatory requirements worldwide.