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Air shut-off valve gives engine safety in hazardous areas

22 July 2008

Amot has launched an ATEX approved electric 250mm (10in) hazardous area Model 4261 emergency engine air shut-off valve protecting bigger diesel engines from the risk of dangerous and damaging runaways when they burn hydrocarbon vapours or other combustibles, even after their fuel source has been closed.

ATEX approved to EX II 3 G EExn IIC T4, zone II, the valve is fully controlled by a custom electronic control module preventing the solenoid from generating excessive surface temperature. Solid state sensing and control have increased reliability and robustness allowing easy interface to other controllers.

SpeedTrap valves have a compact design with easy low-cost installation and a remote reset facility for more flexible control. An O-ring seal ensures positive shutdown of the air supply to an engine as required for safety.

In operation the control panel monitors engine speed and sends a shut-down demand to the valve if it exceeds a set limit.