Regarding the location of the safety valve in the heat exchanger circulating water pipeline?
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I saw on the flow chart of the same device that some safety valves are placed on the circulating water pipeline of the heat exchanger, some are placed in the inlet pipeline, and some are placed in the outlet pipeline. I wonder what the difference is between the two situations? Thank you all heroes in advance! This post was last edited by hutom123 on 2009-3-24 16:30 ]
"There is no problem with the inlet pipeline\outlet pipeline, as long as there is no valve between the interface with the equipment.
That's right, the location of the safety valve doesn't matter. The pressure relief of the safety valve here is the thermal expansion of the water after closing the circulating water inlet and outlet valves. As long as there are no valves between the safety valve and the heat exchanger, it will be fine.
Theoretically, it is most suitable for the safety valve to be placed on the circulating water return pipeline, which may prevent the temperature of the return water pipeline from rising too much and causing a pressure increase.
The safety valve is usually placed on the water outlet pipe, but it can also be placed on the water inlet pipe. Usually there is no valve in front of the safety valve. If the process requires a valve, it must be normally open.
It should be placed in front of the outlet pipe valve. Our water exchange control is to adjust the return water valve to prevent the temperature of the return water pipeline from rising too much and causing a pressure increase.
Both import and export are possible, but it is more common to place them on the export line.
We put it in front of the return valve. Is it the wrong place for the inlet? There is no valve in the lead line of the safety valve.
In order to prevent the circulating water from entering and exiting the valve pipe due to temperature rise and overpressure, a safety valve can be added between the inlet and outlet valves.
It should be placed on the outlet pipeline, and it should be ensured that there are no other valves between the pipeline and the heat exchanger.
Both inlet and outlet are possible, because pressure can be transmitted. Therefore, as a safety valve on the circulating water pipeline of the heat exchanger, it is used to protect the heat exchanger. This requires that there be no shut-off valve between the inlet/outlet of the heat exchanger and the node of the safety valve line.； At the inlet of the safety valve, the valve should be normally open. For the backup safety valve, the valve should be normally closed.