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Engine Overspeed and Shutdown Valves


 
ENGINE AIR INTAKE SHUT DOWN (SHUT OFF) VALVES

If flammable gas or vapour is drawn into the intake of a diesel engine it acts as an additional ungoverned fuel supply. When this occurs the only certain way to stop the engine is by the operation of an air intake shut down (shut off) valve. Failure to stop the engine can result in uncontrolled engine overspeed followed by mechanical failure or flash back from the intake resulting in ignition of the surrounding flammable atmosphere.
 

CHALWYN MECHANICAL AUTOMATIC SHUT DOWN SYSTEM SELECTION

When a diesel engine is operated in a hazardous area or in an application where special precautions are justified, it is often a general requirement that the engine automatically shuts down if its speed, critical temperatures or oil pressure fall outside of predetermined limits. It is widely recognised that the best method to achieve such an emergency automatic shut down is by closure of an engine air intake shut down (shut off) valve. To comply with EN 1834-1:2000 both the engine air intake and diesel fuel supply must be shut down automatically in the event of engine overspeed. It must also be possible to operate the air shut down valve manually.
 

DIESEL ENGINE MONITORING AND AUTOMATIC SHUT DOWN SYSTEMS – ELECTRONIC

When a diesel engine is operated in a hazardous area or in an application where special precautions are justified, it is often a general requirement that the engine automatically shuts down if its speed, critical temperatures or oil pressure fall outside of predetermined limits. It is widely recognised that the best method to achieve such an emergency automatic shut down is by closure of an engine air intake shut down (shut off) valve. To comply with EN 1834-1:2000 both the engine air intake and diesel fuel supply must be shut down automatically in the event of engine overspeed. It must also be possible to operate the air shut down valve manually.


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