Seal Pot Showing Temperature
Seal Pot Showing Temperature
(OP)
We have two centrifugal pumps which we will be comissioning soon. One pump has tandem seal arrangement and one has dual seal arrangement. Both these pumps are using seal pots. For testing purposes, we used water to check the pumps. During testing both seals worked fine, water level in sea pot was good, however the seal pot saw a drastic increase in temperature. Please advice.





RE: Seal Pot Showing Temperature
RE: Seal Pot Showing Temperature
Johnny Pellin
RE: Seal Pot Showing Temperature
I work for a mechanical seal manufacturer.
It is normal for the seal pot to rise in temperature under normal operation. This means you are dumping heat from the mechanical seal. You should also notice that one of the two pipes is hotter. This will let you know that the system is "thermosyphoning" correctly.
In most cases we take the customers process information (seal size and type, pressures, process temp, ambient temp, barrier fluid etc). We use this to calculate the amount of energy (heat) that you need to remove from the system.
It could be that your system is running fine but it would be worth checking with your manufacturer. It could be that you require additional measures to remove more heat. This could be as simple as some finned tubing on the pipes to and from the seal. If you need to remove more heat you may need a vessel with a cooling coil.
If you would like me to run your process info through my software just let me know.
Thanks
S
RE: Seal Pot Showing Temperature
You can evaluate if there is any difference between the inlet and outlet port.
If the temperature is above of what is recommended by the seal mfg, you can cold de sealing fluid using a coil or something related.
Mario Souza
Application & Product Engineering
WMF Solutions Brazil
http://www.wmfsolutions.com
RE: Seal Pot Showing Temperature
RE: Seal Pot Showing Temperature
RE: Seal Pot Showing Temperature
RE: Seal Pot Showing Temperature
RE: Seal Pot Showing Temperature
"Make sure that you use 3/4" tubing and sweeping bends as opposed to 90 degree elbows. if you have 1/2" tubing change it and you may notice significant change when considering all above comments."
Please explain why sweeping bends and 3/4" tubing are better.
RE: Seal Pot Showing Temperature
RE: Seal Pot Showing Temperature
If you provide more information on shaft size and seal types we can eloborate further. trust this helps
RE: Seal Pot Showing Temperature
In additon- be sure that the tubing runs are always rising from the seal to the reservoir without high points in between. High points will trap air and vapor lock the
circulation.
Another good thing to consider is radiant heat from nearby equipment. Reservoir placement should always be carefully considered around hot piping and equipment.