From Vine to Wine with Air-Operated Double-Diaphragm (AODD) Pumps
The AODD-Pump's Advantage: Worldclass Pumps for Worldclass Vintages
Transferring must to fermentation tanks requires a pump that can meet the flow and head requirements while handling the larger solid particles without damaging the product. Ideal for this application is an air-operated double-diaphragm (AODD) pump, which can be used throughout the winemaking process:
- Pumpover – Which is the process of pumping the juice at the bottom of the fermentation tank over the top layer of grape skins and allowing it to seep through. This circulation occurs frequently throughout the day, and for extended periods of time.
- Transfer – After fermentation, the wine is transferred to a new tank via cart-mounted pumps.
- Press – Any remaining juice, leftover skins and solids are pumped to a press. This pressed wine can then be added to the free-run wine or used for blending.
AODD pumps provide the operational reliability and efficiency that both small and large winemakers demand. For example, the Saniflo Hygienic Series (HS) AODD Pump by Wilden, a pump company from Grand Terrace, California, USA, is an well suited for general transfer, pumpover processes, filter feed and lees (deposits of dead or residual yeast) handling. The series features a seal-less design that minimizes air incorporation and oxidation, while its low-shear setup ensures that the product quality is not compromised. The pump’s gentle handling also reduces the release of seed tannins in the must.
The Saniflo pumps are portable and comparably lightweight, and feature dry-run and deadhead capabilities to ensure the safety of the pump. The units are lubrication-free and offer strong suction. Saniflo HS pumps are available in 13 mm (1/2”) to 76 mm (3”) sizes. They feature maximum pressures to 17 bar (250 psig) and flow rates to 884 L/min (223 gpm). The pumps are made of standard FDA-compliant materials, and when properly equipped, carry the 3A Symbol based on standard 44-03, a standard that validates sound hygienic design and cleanability.