Slip delivery systems

To achieve this high level of efficiency, all aspects of the system need to be optimized. An SCR system will generally comprise an ammonia delivery system, and the catalyst system itself comprises the DOC (and typically DPF), SCR catalyst, and the ammonia slip catalyst. 

The delivery system builds around the extensive commuter railway system, the backbone of the Mumbai transport network, coimecting the vast suburbs to the city areas. The timetable of the railway system and the common delivery deadline for the tiffins induce a natural clockspeed into the delivery operations. Every dabbawallah understands the need to race against time to reach his destined station to meet his badli (counterpart) who will board the local train with his quota at the precise hour at a given station. The effect of slip dehvery is immediately discemable. 

Thermoplastic polyesters include polybutylene terephthalate (PBT), which possesses good slip and wear properties, resists chemicals and hydrolysis, and has excellent dimensional stability. Mechanical parts in drug delivery and filter systems are preferably made of PBT. 

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