A Chalwyn valve shuts off the air intake to a diesel engine to prevent overspeeding and
explosions. It's used in hazardous areas where there's a risk of flammable vapors or dust.
How it works
The valve closes as the engine speed increases
It completely shuts off the air intake, starving the engine of oxygen
This cuts off the external fuel source and air supply, causing the engine to stop
Applications petrochemical applications, light towers, portable generators, and most industrial
equipment.
Benefits Prevents engine overspeeding, Prevents explosions, Stops the engine from running
away beyond a safe limit, and Protects diesel-powered equipment.
Safety considerations
If flammable gas or vapor is drawn into the air intake, it can act as an additional fuel
supply
This can result in dangerous mechanical failure or flash back
Diesel engine runaway has led to fatal accidents
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