Chapter 23

Winery Pumps

Winery Valves

There are many valve options, and many types are used. Examples include simple solenoid, motorized two-way and three-way valves, and six-way valves. Valves can be electric/voltage-operated or pneumatic/air-operated, with an air compressor system required for the latter. Opentop fermentors have no restrictions, but closed tanks require a pressure-relief valves to allow the gas to escape. Excessive carbon dioxide pressure buildup can lead to tank ruptures or overflowing juice and must due to excessive foam created by high levels of carbon dioxide gas. The two primary valves used in a winery are ball valves and butterfly valves. They are used to control the flow of most types of gases or liquids across a wide range of temperatures and pressures.

Diaphragm Valves

These valves are mostly used to control the flow of water or air rather than juice or wine. If they are installed at the correct angle (usually around 45° from the upright position), they are free draining around the weir and contain no pockets or crevices for liquid or solids to accumulate.

Ball Valves

A ball valve is (in simplest terms) a ball with a hole running through it. Turning the valve positions the hole to either block, partially block, or complete the flow line through the valve. Advantages of ball valves include an excellent seal with little to no leaking when the valve is fully closed. A ball valve will turn regardless of the pressure on the supply side. If the hole through the valve is larger or larger than the supply pipe's inner diameter, the ball valve will essentially offer no pressure drop or restriction when fully opened.

Butterfly Valves

Butterfly valves are constructed using a round stainlesssteel disk the diameter of the surrounding pipe that turns using connections at the top and bottom of the disk (using a handle attached to the top connection). One of the advantages of butterfly valves is that they are relatively inexpensive to build, clean, and maintain. Although generally cleanable there are two places where the disk attaches to seal/valve body (where particles and/ or microbes can be trapped).

Flow Control Valves

Flow control valves are operated through a computer screen or through an automation sequence controlled by a programmable logic controller (PLC) or other types of controllers.

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