How often should the exhaust valve on the drain pipe be opened?
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I would like to ask experienced friends: in factories, for system water or cooling water pipelines, how often should the vent valves on the drainage pipes be left open? Logically, the air accumulated in the drain pipe should be released, but it’s impossible to determine whether there is any air inside or how much air there is. How often do people usually open the exhaust valve during operation?
The system is running normally, and the pump is working perfectly fine; why turn on the drain valve when there’s no problem?
It’s related to the specific conditions of your cooling water pipes, right? What kind of equipment are you talking about? Also, what are the temperature, pressure, and flow rate of the cooling water pipes? If the temperature and pressure aren’t very high, there shouldn’t be much gas generated. If the temperature is very high and the flow rate is high, a large amount of liquid may vaporize, which can also lead to significant pressure fluctuations, poor fluid flow, and phenomena such as water hammer. In such cases, it is necessary to vent air promptly. In severe situations, venting alone is not sufficient; additional measures are required, such as installing a condensate tank (to stabilize pressure).
It depends on the specific circumstances. Since the poster mentioned that it’s the system’s water supply and cold water pipes, the temperature is low, so the interval between regular tests of the drain valve can be extended
To understand time, it is also necessary to know what the main medium is. If it is steam, the pipes need to be opened during maintenance in order to cool them and allow more steam to escape, thereby preventing water hammer effects
It generally isn’t necessary to use it; it’s used for releasing air when starting the vehicle for the first time or after maintenance
Installing a spiral air separator on the pipeline eliminates this problem. It can automatically collect air and microbubbles within the system, and then discharge them through an exhaust valve (a fully automatic exhaust system with a patented design that prevents leakage).