Air Intake Valves
If flammable gas or vapour is drawn into the air intake of a diesel engine, it acts as an additional ungoverned fuel supply. This may result in uncontrolled engine overspeed followed by dangerous mechanical failure or flash back through the intake and the ignition of the surrounding gas or vapour cloud.
Once a flammable mixture is being drawn into the engine intake it may not be possible to stop the engine by closing down the fuel supply. For this reason an air intake valve must be fitted to ensure a guaranteed rapid and safe engine shutdown.
The Chawlyn shut down valves have metal to metal seals, different size options depending on power and physical size of the air intake and hazardous area options are available.
Our Air Intake Valves
The PVX slim line valves will either open or close on the application of air pressure. A position indicator is on the top of the valve to show wether the valve is open or closed.
Simple cost effective automatic overspeed protection valves requiring no external power or signals.
MVX – Manually operated intake shutdown valves
The MVX slim line valves are the most basic of the slim line valves as they are completely manual.
These will either have stop buttons on the unit or a remote stop with a pull or push options.
The D-valve is a fully mechanical device and can come in completely automatic versions or automatic and manual shutdown.
The Automatic D-valve will close and prevent air or gases being drawn into the air intake of the engine when the set speed is reached.
These are reset when the engine stops.
Manual models can be shutdown via a handle and cable or through the loss of air or oil pressure