The Ecological Valve (EV) is an altitude compensator device accredited by the Colombian Ministry for Environment as effective equipment for environmental control and it was included in the VAT tax exempt items according to official resolution act # 864 issued on August 1996.
Marclais EV was designed to be installed in the intake manifold to regulate proper amounts of air/fuel entering the engine through automatic self-adjustment based on the altitude level changes. By dosing a proper amount of air into the system, an efficient combination with gasoline is produced, which in turn improves the overall engine performance in brand new or used automobiles, including buses and trucks, either running on carburetor or gasoline electronic injection.
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