Della Toffola offers a range of presses with open tanks with innovative features.
These presses are fitted with a tubular membrane made of non-toxic material, attached to a winged supporting element; this membrane and the supporting element are then mounted on the axle of the stainless steel perforated drum.
One of the most particular features of these presses concerns the holes punched in the drum through which the strained must emerges.
In traditional presses, these holes cover only 50% of the drum's surface at most, whereas in the models made by DELLA TOFFOLA they occupy the entire surface, effectively doubling the must straining area.
When it comes to the pressing action, the membrane does not expand on either side of the drum (as is usually the case), it presses evenly against the entire inside wall of the drum.
The exceptional advantages offered by this solution are immediately apparent in terms of must ouput and economy of operation by comparison with conventional machines:

the straining surface area is doubled for the equivalent size of press;
the total pressing time is drastically reduced, to half the usual time;

the crushed grapes are exhausted at a lower working pressure, using fewer pressing and crumbling cycles, and consequently with a minimal handling;

inside the press, the product is distributed in an even, thinner layer and the must is strained over the entire surface of the drum.

All the advantages:

Thanks to these features, the quality of the must improves considerably. In fact, the crushed grapes are exhausted under a lower working pressure, with fewer pressing and crumbling cycles, giving rise to a clear, top-quality must with low levels of polyphenols (waste substances that make the must cloudy).
The mass of grapes to crush in the drum undergoes no lengthy manhandling and its own weight already prompts the straining of a considerable amount of fluid through the perforated surface of the drum.
The maximum crushing pressure (which never exceeds 1.5 bar) is only needed for a few short cycles at the end of the program.

The models up to PE 100 incorprate a device for inflating/deflating the membrane, while the larger models are used with a separate unit.
Thanks to the extremely flexible and user-friendly programming system, there are no limits to the type of grape that can be pressed. In fact, the control panel is complete with a programmable computer (PLC) for the automatic completion of all the processing stages.
Underneath the press there is a tank for collecting and transferring the must coming from the drum.
At the end of the working cycle, the press can quickly unload the grape marc and the cleaning of the press is made simple by the absence of any internal manifolds, which often become clogged and make the cleaning procedure far more troublesome.
The washing procedure is also facilitated by a specific oversized hatch that makes it easier to access the inside of the drum.
In addition to the already excellent return in terms of product quality and quantity, and the halving of the processing times, Della Toffola's presses also ensure a whole set of other advantages for a cost-effective operation, i.e.

smaller presses and systems are used to produce the same amount of product
the working cycle can be conducted continuously, without any need for lengthy interruptions
systems consisting of several machines can be controlled centrally and with the aid of a computer
All the presses are tested in accordance with directive 97/23/CE