Amot has added an Atex approved, electric 250 mm hazardous area model 4261 emergency engine air shut-off valve to its standard SpeedTrap range. 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. The valve retains all the features of the standard Model 4261, but has also been mechanically modified to comply with Atex. Solid state sensing and control have increased reliability and robustness allowing easy interface to other controllers. SpeedTrap valves can be used stand-alone or in complete runaway shutdown systems. They have a compact design and a remote reset facility. 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 shutdown demand to the valve if it exceeds a set limit. A valve position feedback signal confirms valve actuation.