The U.S. Environmental Protection Agency (EPA) has placed Nett Technologies BlueMAX urea-based selective catalytic reduction (SCR) system on the National Clean diesel campaign’s emerging technologies list. The BlueMAX SCR system, available from Norman G Clark , is approved for use in emerging technology applications on nonroad, 4-cycle, heavy-duty diesel Caterpillar engine models of 3306, 3116, 3406 in the 75-450 kW (100-600 hp) power ranges.
Nett’s BlueMAX SCR system is designed to control nitrogen oxides (NOX) emissions from medium and heavy-duty diesel engines. The BlueMAX SCR system uses a urea control strategy that relies on a NOX concentration measurement by a sensor positioned upstream of the SCR catalyst. Based on the NOX sensor signal, in combination with an engine air mass flow sensor and temperature sensor, the necessary urea dosing rate is calculated by the control algorithm.
The NOX sensor-based control strategy makes the BlueMAX SCR system suitable for retrofit applications. No time-consuming calibration (such as through engine mapping) is necessary, and the BlueMAX SCR system can be installed on a range of diesel engines, including mechanical engines. The Nett BlueMAX SCR system also controls diesel particulate matter (DPM), hydrocarbons (HC) and carbon monoxide (CO). Nett provide direct-fit (catalyst assembly replaces the equipment’s original muffler) solutions through an integrated approach of application engineering and manufacturing. The Nett BlueMAX SCR system is offered as a direct-fit design and this simplifies the installation and offers a customised cost-effective solution to a sophisticated emission control problem.