Pump cooling water and seal water
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I understand that the cooling water for the pump is used to cool the bearings and similar components; it serves solely a cooling purpose and never comes into contact with the medium, so there is no risk of it becoming contaminated. Sealing water is used at the mechanical seal location to cool it as well as to lubricate it, and this water can become contaminated. I’m not sure if my understanding above is correct? Is it complete? I would also like professionals to help with a comprehensive analysis. Also, could this mechanical seal water leak into the medium? Is there any sealed water that only flows in and not out, going directly into the process medium?
It’s possible. When the seal leaks, and the sealing chamber is in a vacuum state or at a pressure lower than that of water. Such as the vacuum tower bottom pump
Sealed water enters the pump; the medium inside the pump follows the Plan21/23 scheme, while external water uses the Plan32 scheme.
You can use a pump that doesn’t require cooling water; don’t keep staying on -ed
Nowadays, pumps all come with their own cooling circulation system
That’s not quite right; the cooling water in the pump is used to cool the sealing chamber. High-temperature pumps have cooling systems for their bearings. As for whether the sealant water might leak into the medium, it depends on the flushing method used. If the medium permits it, then it’s okay – this is the case with P32 flushing. If the medium is oil-based, then flushing methods such as P52 or P53 are used, with white oil being employed for sealing and cooling the sealing chamber. Generally, either the medium inside the pump flows out or a flushing medium flows in; to achieve complete leaklessness, a shielded pump must be used. Search for \"API flushing\" on Baidu; there’s a lot of information available online
There are many types of pumps. The pump cooling water you are referring to is mostly found in pumps that have bearing housings; this cooling water circulates within the bearing housing to lower the temperature of the lubricating oil, thereby ensuring proper lubrication of the bearings ； The mechanical seal refers to the sealing mechanism of the pump itself. The cooling water used for the mechanical seal is intended to lower the temperature at the interface between the rotating and stationary rings, thereby preventing frictional heat from damaging the sealing surface. Under normal conditions, a small amount of this water is drawn into the pump due to the negative pressure generated during pump operation; if there is a large amount of leakage, it indicates that there are defects in the sealing surface of the mechanical seal, and repair is necessary.