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Variable Capacity wine tank
 A variable capacity wine tank, also known as a floating-lid or variable volume tank, is a versatile vessel used in winemaking. It allows winemakers to adjust the tank’s volume to minimize air contact with the wine, which helps preserve the wine’s quality and prevent oxidation. Here are steps on how to use a variable capacity wine tank:

1.Set Up the Tank:

Place the variable capacity tank in a suitable location in your winemaking facility. Ensure it is on a stable and level surface.

Make sure all fittings, valves, and seals are in good working condition to prevent leaks.

2.Clean and Sanitize:

Thoroughly clean and sanitize the tank to ensure there are no contaminants that could spoil your wine.

3.Transfer Wine:

Transfer your wine or grape juice into the tank from your fermentation vessel or another storage container.

4.Adjust the Lid:

The key feature of a variable capacity tank is its floating lid. This lid can be adjusted to minimize the headspace above the wine, reducing the risk of oxidation. To do this:

Ensure the lid is clean and sanitized.

Lower the floating lid onto the surface of the wine while allowing some space for expansion during fermentation.

5.Secure the Lid:

Some variable capacity tanks have a mechanism to secure the floating lid in place, such as a ratchet strap. Use this mechanism to hold the lid down.

6.Monitor Fermentation:

Monitor the fermentation process as usual. The floating lid will rise as carbon dioxide is produced during fermentation. This helps to maintain minimal headspace.

7.Adjust Lid Height:

As fermentation progresses, you may need to adjust the lid height to accommodate the rising level of wine. This is important to prevent excessive headspace, which can lead to oxidation.

Use the tank’s adjustment mechanism (often a hand crank or winch) to raise or lower the floating lid accordingly.

8.Seal the Tank:

Once fermentation is complete, and you have adjusted the lid to minimize headspace, seal the tank tightly to prevent air contact. Ensure all seals and gaskets are in good condition.

9.Aging and Storage:

Variable capacity tanks are suitable for aging and storing wine as well. Continue to monitor the wine and make any necessary adjustments to the lid height as wine levels change due to evaporation or racking.

10.Sampling and Analysis:

Use the sampling ports or valves provided on the tank to take samples for analysis and tasting as needed.

11.Bottling:

When it’s time to bottle your wine, carefully remove the floating lid and transfer the wine to your bottling equipment.

12.Cleaning and Maintenance:

After emptying the tank, clean and sanitize it thoroughly to prepare for the next batch of wine. Ensure that all parts of the tank are in good condition.

Using a variable capacity wine tank allows for flexibility in winemaking and helps preserve the quality of your wine by minimizing exposure to oxygen. Proper cleaning, maintenance, and monitoring are essential throughout the winemaking process to ensure the best results.

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