Pump circulation water pipe sight glass
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For some pumps in the plant, such as the condensate water pumps, the mechanical seals of these pumps are cooled using circulating water. I see that there are sight glasses in the circulating water pipes – what is the purpose of installing these sight glasses? I don’t quite understand, thank you. Please discuss, extra points available
A reminder from the design institute: Generally, return water pipes for cooling water should be equipped with return water sight glasses. Its function is to check whether the circulating water pipeline is unobstructed. PS: In some cases, the temperature of the mechanical seal is quite high; for example, when pumping liquids at temperatures above 300°C, the cooling system for the mechanical seal tends to reach high temperatures. Scale formation can occur as a result of the circulation of water, and since the circulating water isn’t always clean, coupled with the fact that the pipes used for cooling the mechanical seal aren’t thick enough, blockages can easily occur. With a return water sight glass, it’s possible to observe the flow of water through it.
Some have a rotor in the middle to observe water flow
A flow indicator that shows whether there is fluid flowing in the pipeline, preventing unawareness of pipeline blockages. Do we have to remove the tubes for inspection every day?
Used to observe the water flow, facilitating inspections of the circulation water operation
A flow indicator that allows one to check whether the seal water is dirty; if it rotates more slowly, it’s necessary to check for blockages. To avoid unnecessary trouble in production.
There is a rotating wheel inside the return water sight glass; if it stops, it indicates that the sealing water flow has ceased, meaning the seal is likely damaged and the pump needs to be stopped for maintenance