The new V series mechanical action valves use a new concept design offering enhanced safety and operational advantages to automatically close the air intake once a pre-set engine speed is exceeded – and challenge traditional overspeed protection valves that have remained unchanged in their basic operation for several decades.

Suitable for both normally aspirated and turbocharged diesel engines up to 275kW (370 HP), these compact valves improve on the established differential pressure intake airflow principle for automatic shutdown.

They also incorporate a manual emergency shutdown feature to meet the requirements specified in EN 1834-1:2000 for diesel engine air intake shutdown valves for operation in hazardous areas. Furthermore, the valve has been designed to necessitate a manual reset with positive intervention by an operator rather than rely upon potentially outmoded and less safe practice where the valve automatically resets on an engine restart.

The new ‘auto/manual’ valve is produced using advanced precision manufacturing and thoroughly tested to the highest quality standards to guarantee maximum reliability whilst maintaining a very competitive selling price – even against current automatic-only shut down valves.

Further advantages include increased diesel engine efficiency as the valve disc seating design and low friction trigger mechanism results in a lower air flow restriction at higher flow rates than in some traditional designs. The new valve is also more compact in design which is particularly effective for tight engine bays where space is restricted. Once fitted, the V series valve is simply set-up and adjusted in-situ via a trip adjuster screw and does not require removal of the air-intake hose, thereby ensuring straightforward and fast commissioning.

With six models to suit a wide combination of engine ratings and intake pipe diameters, and with a choice of manual shutdown cable lengths, selecting the appropriate V series range is straightforward.