Central Inflating Membrane Presses have several advantages over traditional nylon bladder wine presses. By locating the wine presses membrane (which is over 1/4" thick) in the center of the press drum, the press is pressing with uniform pressure in 365 degrees. When the membrane is inflating the drum is always rotating so the grapes are the same thickness all around the outside of the drum. The outside of the press drum is the largest diameter of the drum. What this technology does is creates a much thinner cake vs having a bladder sewn in the side of a drum and pushing the grapes in one direction and creating a thick cake. The thinner the cake the easier it is to extract the juice. Thinner cakes require less pressure to achieve higher yields. Less pressure equals getting less of the heavy tannins in your must and wines. The heavy bitter tannins you don't want that are trapped in the grape skins that come out into your wine with heavy pressure.
Having a thin cake also makes it easier to extract the juice, as it is performed in almost half the time! Reducing pressing times, reduces your oxygen exposure and protects your whites from browning. The press also does not have to break the cake as many times as a traditional nylon wine presses does, so you end up with less lees in your wines. Most traditional nylon side inflating presses come in a closed drum because of this long oxygen exposure while being in the press for so long. Central inflating membrane presses even with a fully pierced drum have less oxygen exposure than closed drum traditional nylon bladder presses. The over 1/4" thick membrane is also very easy to clean as it sucks up tight to the central tie rods smoothly with no accordianing for bacteria to hide. The membranes are also designed to reach the entire circumference of the drum! This means they have no minimum grape loading capacities, you can press any size lot in a large press!
New Technology Central Membrane Wine Presses
Higher Yields at Much Lower Pressures
Higher Quality Yields
Less Heavy Tannins
Less Oxidation, Less Browning on Whites
No Load Minimums
Bladder can reach the entire Circumference of the Drum
Uniform Pressure throughout the Drum
10 to 20 year lifespan on the Membrane! (5/16" Thick)
Lower Energy Consumption
Ability to Press Crushed Apples and Deshelled Pomegranates
Old Technology Bladder Wine Presses
Lower Yields at Higher Pressures
Introduction of Heavy Tannins from the Skins Due to High Pressures
Longer Pressing Cycles
More Lees due to having the break the Thick Cake more times
More Oxidation, More Browning on White due to Longer Pressing Cycles
Bladder can reach the entire Circumference of the Drum
Minimum Load Capacities for Press use and Press Efficiency
Thin Nylon Bladder (1/16" Thick) easier to tear, needs to be replaced more often
Higher Energy Consumption
Cannot Press Crushed Apples or Deshelled Pomegranates
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