Q. Why would I need a Roda Deaco valve?
A. Airborne hydrocarbons (combustible vapors) present a threat to the controlled operation of a diesel engine. These gases can be drawn into the air intake system, causing the engine to accelerate (over speed) out of control with the possibility of causing engine damage, explosion or fire.
Q. Why couldn’t I use a fuel shut off system instead?
A. The airborne hydrocarbons become your engines fuel source. Even though the conventional fuel source (diesel) has been cut off, the engine will continue to run on the gases carried in through the air intake system. In order to shut down the engine and prevent over speed, the air intake system must be closed off.
Q. What kind of controls should I use to actuate the valve ?
A. We offer a wide variety of actuating systems. Many companies today require that your vehicle/machine/engine be equipped with a Full Automatic System. Some companies may only require very basic manual controls. A product overview is available for our actuating systems in products & services. It is best to confirm with your employer or customer what type of controls you require.
Q. How does the Roda Deaco Valve air shutoff system work ?
A. The Roda Deaco Valve is mounted as close as possible to the engines air intake manifold. When the valve is actuated, airflow to the engine is ‘cut off’ prohibiting any further engine operation.
Q. Where should the valve be installed on the engine ?
A. The Roda Deaco Valve should be installed either directly onto the engine intake manifold, or as close to as possible. It is essential to have solid metal connections between the valve and engine. If the valve cannot be mounted directly to the intake manifold (because of size and space restrictions), all rubber hoses and elbows between the valve and the intake manifold must be replaced. If any rubber hose longer than 1/2" remains inline between valve and intake, it may collapse or fail when the valve is actuated.
Q. Will use of the Roda Deaco Valve damage my engine ?
A. After thousands of tests at idle and test RPM, no sustainable engine damage has been found or reported. In the event of an over speed situation, it is very possible to reach RPM’s well in excess of the governed RPM, or RPM’s deemed unsafe by the engine manufacturer. In this case, the Roda Deaco Valve has either avoided or greatly reduced any damage to the engine in the event of over speed.
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