PET Air Conveyors

MicroDry™ Lubrication of PET Neck Ring Air Conveyors has become a key factor in improving the productivity.

Customers recognise our “DLAC” system for MicroDry™ Lubrication for Air Conveyors together with the lubricant DLT-333 as “a new solution for an old problem”.

For 2 lit/year of DLT-333 for each 100 meter section of air conveyor we :

  • virtually eliminate the bottle jams
  • realise a saving of up to 45% on fan energy
  • substantially reduce the cleaning rate
  • decrease the frequency of filter replacement

Air conveyors are widely used to convey empty PET bottles from the blow moulder, unscrambler or depalletiser to the filler.

The majority of the PET lines face problems of bottling jams that create downtime on the line and substantially reduce the productivity of the filler ; most of these jams are situated downstream curves and near to incline sections, but some of them are even in straight strokes.

These jams are caused by unstable behaviour of the bottle mainly due too

  • gradual decrease of air flow caused by increasing filter pressure drop
  • lightweighted and/or uniquely shaped bottles
  • higher required capacities

Some mechanical re-engineering can decrease the jam rate for particular situations, f.ex. by using low friction neck ring material and floating air devices, but customers meanwhile have recognised DLAC/DLT-333 as a general applicable, high efficient and sustainable technology which can solve the jamming issues for all types of air conveyors ; that alone results in very quick paybacks.

In addition, there is up to 45% energy savings from blower fans, which now only need about half the air pressure to operate.

There are also savings from extended filter and neck guide life.

The CHP system utilizes the high effective DLT-333 food-grade lubricant that is NSF-H1 registered. The DLU-5000 or DLU-5100 control unit is fully automatic and can be expanded to serve a complete bottling plant with over 1 000 lubrication points. Extremely low lubricant consumption is guaranteed as a result of CHP’s MicroDry™ dispensing technology.

This technology has become one of our most important spin-off activities; we developed this in 2007 and in the meantime we have an installed base of over 150 air conveyor lines.

All major OEM’s as Krones, KHS, Sidel and Alliance have recognised the DLAC/DLT-333 concept as the BAT (Best Available Technology) to overcome jamming problems.

Many of them have approved the system and made it part of their delivery program.

Certificates for use on aseptic lines are available.