Is it necessary to install a drain valve in the heating pipeline network?

Reply to 2# menglin2157: The heating medium is water. If a drain valve is not installed, how can the water in the system be removed? Especially, how to drain the water from it after the hydrostatic testing is completed

The design manual states that a drain point should be provided at the lowest point

This post was last edited by luodanwsk on 2011-1-5 at 10:25. Gas freeze-drying is something that most people are familiar with – after passing through the freeze-drier, the gas becomes much drier. However, an electronic automatic drain valve (which can also be used for draining oil) needs to be installed in the gas storage tank. Why? Because the saturation temperature of gases varies depending on pressure and temperature. Drying is also relative; in that case, it’s no longer a heating pipeline but rather a water pipe, haha. The design manual states that a drain valve should be installed at the lower part of the gas pipeline, and an exhaust valve at the upper part of the water pipeline – that’s definitely correct

Generally, a vent valve should be installed at the lowest point, which helps prevent freezing during maintenance in winter

Specify to release air at high points and water at low points! Although many pipelines are lacking, it is easier to operate and maintain them; it’s still good to have mechanisms for releasing air and water

When the piping system needs to be emptied, a drain valve must be available

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