EVO pneumatic cylinder

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EVO pneumatic cylinder

Pneumatic lifting cylinders with air recycling

The added value of BORELLI group fillers

CILINDRI The pneumatic cylinders with air recycling were introduced on Borelli group fillers and monoblocks already in 2005. We have always asserted that the mechanical system in the lifting cylinder of the filler is not the most reliable solution from the technical point of view. For this reason pneumatic cylinders are mainly used on isobaric fillers and high performance fillers.

Since we were strongly convinced of this, in 2005 we started equipping our fillers, from the small semi-automatic rotary machine to the medium capacity equipments, with pneumatic cylinders abandoning the technology of the mechanical spring cylinder definitively.

Longer stroke and constant thrust. Fewer adjustments, more efficiency.

In detail the advantages of this solution.
In the pneumatic cylinder the thrust is constant on the whole stroke while in the spring cylinder the thrust decreases progressively while the piston and the spring extend. This system results in the maximum mechanical effort during the descent and the minimum thrust at the end of the stroke, exactly when it would be more important: during the opening of the valve.

The pneumatic cylinder maintains a constant thrust on the whole stroke and this leads to optimal pressure on the valve while working and slight resistance during the mechanical descent on the cam. In a few words: the working capacity improves and the wear and the breakage in the time are reduced.

Longer stroke and constant thrust. Fewer adjustments, more efficiency.

The pneumatic technology allows manufacturing, with the same overall dimensions, cylinders with much longer stroke if compared to the conventional mechanical cylinders. Normally a mechanical cylinder has a just sufficiently long stroke to lift the bottle till the opening point of the valve. This technical limit requires adjusting the height of the tank at any minimal variation of the height of the bottle.

The stroke of our cylinders is 150 mm, with constant pressure and therefore requires less frequent adjustments of the height of the tank. Referring to a level of 70 mm flush to the mouth it is possible to maintain the height of the tank unchanged for bottles with variations in height of 0/-40 mm. This is undoubtedly an advantage for all as to time-sparing and becomes indispensable for those who use returnable bottles and therefore have to work with glass containers with different heights.

Easily adaptable thrust.

Spinta A further advantage is the possibility of varying the pressure of the cylinder simply regulating the inlet pressure of air in the circuit. In this way the thrust is easily adaptable to the type of valve fitted on the machine and the type of bottle processed. To vary the thrust of a mechanical spring cylinder the only way is substituting the spring, an unviable operation.

No wear.

usura Another remarkable advantage is the elimination of wear. As it is well-known springs degrade with work losing their original thrust. This means that frequent maintenance is needed to maintain the machine in full efficiency. The pneumatic cylinder does not wear and in the time it develops the same thrust regardless the number of hours worked. The maintenance consists only in substituting the gaskets and only in the rare case of breakage. Moreover, said substitution is rapid and simple and does not require the intervention of specialized technicians.

Our pneumatic cylinder is fully manufactured of stainless steel and slides on self-lubricating plastic material guides, therefore is not subject to oxidize. It can work even dry without any problems; however it is recommended to perform light lubrication.