Emissions Control
Selective Catalytic Reduction
Envanio Universal’s selective catalytic reduction (SCR) is an advanced emissions aftertreatment and acoustic silencing system engineered specifically for high-horsepower diesel engines, gas turbines, and industrial prime/standby power generation. Operating across wide exhaust temperature windows with precision closed-loop reagent dosing, our compact, modular systems ensure certified EPA Tier 4 Final and IMO Tier III compliance while delivering integrated sound attenuation, ultra-low ammonia slip, and minimal backpressure. The low-restriction catalyst and silencer flow geometry preserves rated engine horsepower and optimizes fuel efficiency.
Modular & Standardized Construction
Scalable, pre-engineered module housings enable faster deployment for OEMs, custom equipment packagers, and retrofit applications while reducing installation complexity.
Multi-Stage Thermally Harmonized Housing
The system combines DPF soot capture, SCR catalysts, CO oxidation, and advanced silencer attenuation into a single compact and thermally optimized footprint.
Mission-Critical Durability
Designed for both emergency standby and continuous prime power applications, the system features heavy-duty, vibration-resistant construction to ensure maximum reliability and uptime.
Envanio Universal's SCR System Specifications
| Process | Selective Catalytic Reduction (SCR) with Integrated Multi-Stage Aftertreatment & Silencing |
|---|---|
| NOx Destruction Efficiency | Up to 95 to 98% reduction across full engine operating load profiles |
| Operating Temperature Range | 450°F to 1,050°F with active thermal management |
| Reagent Injection | Diesel Exhaust Fluid (DEF) / 32.5% Aqueous Urea or Aqueous Ammonia |
| Target Pollutants | Nitrogen Oxides (NOx), Particulate Matter (PM / Soot), Carbon Monoxide (CO), Hydrocarbons (HC), and VOCs |
| Dosing Skid Architecture | 100% All-Electric injection (no plant compressed air required) |
| Ammonia Slip Control | Integrated Ammonia Slip Catalyst (ASC) maintaining residual slip < 2–5 ppm |
| Construction Materials | Heavy-duty aluminized steel, 304/316L stainless steel, and high-temp acoustic insulation |
Typical Applications for SCR Systems
Envanio Universal designs and manufactures systems for the purification of diesel and gas engine exhaust gases from nitrogen oxides (NOx) tailored to your specific requirements. Thanks to their mission-critical durability and advanced emissions aftertreatment, our selective catalytic reduction systems are well suited for the following applications.
Tier 4 certified emissions abatement and hospital-grade acoustic silencing for emergency standby diesel gensets
FAQ
By utilizing proprietary high-shear static mixing geometry, optimized evaporation lengths, and thermal insulation that maintains gas temperatures well above the urea decomposition point.
