PROJECT DESCRIPTION

The DHEA-A series open presses with central elastic membrane have exclusive construction features and operating results, making them more advantageous and higher performing than normal membrane presses.

 

The DHEA series presses are also available in the closed tank version.

 

Better quality of musts

Thanks to the tubular membrane it is possible to operate at lower pressures, around 1.2 bar, with consequent lower stress on the solid parts of the grapes. This involves:

 

• Less extraction of unwanted substances.
• More harmonious musts.
• Great advantages on less than perfectly healthy grapes.

 

Much shorter pressing cycles

The use of all 360° of the tank as a draining surface determines a lower thickness of marc, therefore the must is released more quickly. A pressing cycle lasts on average 45 minutes / 1 hour, compared to 2.5 hours for presses that use the diametrical membrane.

 

Superior membrane performance

Diametrical membranes in nylon and PVC undergo polymerization phenomena over time that “age” them and therefore must be replaced more frequently. Rubber membranes are less subject to this phenomenon and have longer life limits.

 

Great savings on purchase

A normal membrane press performs a complete cycle between loading, pressing and unloading, in 3.5 hours. Considering 12 working hours, a 50 Hl press performs 3.4 cycles in 12 hours. Loading 100 q. each cycle it can process 340 q. per day. A DHEA press performs a complete cycle in 2.25 hours, therefore in 12 hours it can do 5.3 cycles. A 32 Hl press loading 70 q. per cycle can process 371 q. per day, therefore a DHEA 32 press works more than a traditional 50 Hl press. The difference in cost between a 32 Hl press and a 50 Hl press is considerable.

 

Low electricity consumption

Being able to install a smaller press to still process the same quintals of grapes per day also results in energy savings due to the lower installed power.

 

Made of Aisi 304 stainless steel on wheels, with the following characteristics:

 

• Fully perforated tank in Aisi 304 stainless steel, PED tested, with external sandblasting treatment.
• Elastic central membrane in non-toxic food grade rubber to exploit its entire circumference as a working surface

draining, thus reducing pressing times to a minimum and consequently energy consumption.

• Working pressures up to 1.2 atmospheres which are much lower than presses with diametrical membrane, to increase the quality of the extracted musts.
• Manually opening loading and unloading door.
• Must collection tank in Aisi 304 stainless steel with quick coupling and release, Garolla 50 outlet connection.
• Aisi 304 stainless steel valve for axial loading with Garolla 120 outlet to reduce friction on the product.
• Built-in air compressor, self-braking gearmotor, pinion, crown and chain for tank rotation.
• Easy and intuitive to use CE standard touch screen programming PLC, with six pre-set programs and

possibility of using the electronic keyboard to introduce all the variables that the user deems appropriate.

• Luminous and acoustic bell and safety devices compliant with CE standards.

  PRESSING APPLES AND POMEGRANATES

   

  The DHEA-A series membrane presses with fully perforated tank can be used not only for grapes but also for apples, pomegranates and fruit in general.

  It is necessary to send already cut apples or pomegranates to the press, preferably with a shredder that produces a size of 3/8 mm (rather than pulp).

  The load capacity is about 80-90% of the cage capacity with door feeding and stationary cage. With axial pump feeding and rotating cage, the load capacity is 1-1.2 times of the cage capacity.

  Yields range from a minimum of 65% to a maximum of 75% depending on the type and ripeness of the apples.

   

  Pressing times vary depending on the quality of the apples/pomegranates:

   

  WITH APPLES: 2 h 30′ – 4 h

  WITH POMEGRANATES: 1 h 30′ – 2 h

   

  The indicated performances refer to processing with apples without enzymatic treatment.

  Optionals:

  • Raising legs:

  Possibility to increase the standard height of the press.

   

  • Additional port:

  Possibility of fitting a second small door for inspection and washing.

   

  • Automatic pneumatic valve:

  Possibility of mounting an automatic pneumatic axial loading valve on the 50-80-100-150 models.

   

  • Electric level tank must with pump socket:

  It allows the must extraction pump to work automatically. It activates it when there is no liquid and stops it when there is liquid inside the tank.

   

  • Must pump mounted on the press:

  If necessary, the must pump is supplied already mounted on the press frame.

   

  • External tank washing system, on models 16-24-32:

  Stainless steel perforated tube mounted on the press frame which allows external washing of the tank, with the aid of an external pump (not included in the supply).

   

  • Membrane repair kit and door gasket replacement:

  Some patches and special glue are provided, in case of a small tear of the membrane inside the tank. Also a gasket for the pneumatic door.

   

  • Remote control compatible with Industry 4.0.

   

  • Macon 50, DIN50, Friederich 40 and Clamp on must collection tank and pump.

   

  • Macon, DIN, Friederich and Clamp on axial load valve.