What’s a draft tube?

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A draft tube is an important part of a turbine, which is used to transform water into energy. It is found within the piping system in jets, dams, or anywhere else where turbines help perform difficult mechanical work. Turbines must have a minimum amount of water to drive them in order to produce sufficient energy. Without these pipes, the pressure could drop from lack of water and, in turn, the entire turbine could fail and lose power.

The main purpose of the draft tube is to monitor the inflow of water. The turbine has something called a “tail run,” which is the lowest part of a dam or construction project where water accumulates. The tube connects the turbine to this tail run, allowing the turbine to be out of the water but still have access to the water.

A draft pipe can be relatively simple to construct, but it must be strong and durable enough to withstand the elements and the work of turbines. One may also be straight or curved, depending on the general construction of the turbine.
With this part it is possible to maintain the important water column which keeps the turbine running. The correct water level can be maintained despite any lack of material flowing into the machine. In this case, the tubing can help keep the flow of water flowing into the turbine even as water levels drop, so that the turbine can operate properly with the correct amount of pressure maintained.

Often, draft pipes must be installed under a dam, aircraft, or other machinery controlled by turbine work. They must be strong enough to resist the pressure placed on them. If they are installed or repaired after the turbine is already running, they sometimes need to be placed while other parts are also running, sometimes even while air, gas or water is already flowing through the turbine. Consequently, they must be placed in the turbine by a careful movement along the edge of the fixture.

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