The ECV5 is a fuel control valve that can control gas mixture to ensure reduced emissions. This valve operates in a closed-loop manner, utilizing an oxygen (O2) sensor placed in the exhaust and a three-way catalytic converter. It is suitable for carbureted natural gas engines ranging from 75 to 750 kW, whether naturally aspirated or turbocharged. The O2 sensor measures oxygen content in the exhaust and sends feedback to the emissions control valve. This closed-loop system adjusts the fuel mixture to be slightly richer than stoichiometric for optimal three-way catalytic converter performance. The valve's electronics regulate the AFR by controlling injection pressure in response to load signals. Learn more about the ECV5 features and benefits in this article.