PETpla.net Insider 01+02 / 2013

BOTTLE MAKING 26 PET planet insider Vol. 14 No. 01+02/13 www.petpla.net The first compressed air to be recovered from the high pressure air tank is used for 100% coverage of the pre- blow operation. The remainder of air in the high pressure air tank covers a proportion of the main blowing process. This is the vital new feature because what we are looking for is the saving of the expensive high pressure air. The original high pressure air line is responsible for delivering the second blow phase of P2’. The compressed air derived from the second recov- ery process (which is by now in the low pressure air tank) is used for 100% coverage of the pneumatics inside the machine while the remaining air is conveyed to the pro- duction low pressure air line. The air recovered is filtered so that it is dry as well as free of oil and dust. The pressure in the high pressure air tank is around 50% of the main blow pressure (P2’) and approx. 12bar in the low pressure air tank. The patented ARS+ offers the following advantages:  Savings of around 30% of high pressure air.  100% coverage of low pressure air for the machine pneumatics and there is still some air left for the pro- duction low pressure air line.  Reduced power consumption of the high and low pres- sure air compressors.  The possibility exists of switching off compressors and thus saving on maintenance costs or using smaller compressors.  The number of compressors required could be reduced, thus gaining space and ensuring that less noise develops. ARS and blow pressure curve ARS+ compressed air recovery schematic