Most applications are virtually maintenance-free. Low Pressure Drop . Due to thin walls and large frontal area the catalyst substrates have low pressure drop and do not cause any fuel penalty. Technologies offers two designs of both the standard and D-Series catalytic purifiers, as shown in Figures 1 and 2. Welded design is more compact and recommended for space limited applications.
Clamped design allows for easy removal of the centerbody for inspection and cleaning.
Welded Design Figure 2. The catalyst substrate is designed to last for the entire life-span of the engine. Good engine maintenance, however, is necessary to sustain the catalyst activity for similar period of time. Diesel engines have intrinsically cool exhaust gases and thermal catalyst deterioration is not likely to take place under normal operating conditions. Catalyst overheating may occur only as a result of serious engine malfunction, such as leaking injectors, when unburned fuel is oxidized in the catalyst and excessive temperature rise is observed due to the exothermic reaction.