Reasons for the burnout of the pump seal
Thread Content
Dear friends: I would like to ask a question. The temperature of the liquid is around 90 degrees, and the pump is a horizontal centrifugal pump with a seal that is cooled by water separately. Could the seal get damaged due to the high temperature of the liquid during normal operation? Thank you!
No, if the pump seal burns out, it indicates that the temperature is too high. The most likely cause is dry grinding; your material’s temperature is only 90 degrees, so that’s impossible
No, this temperature is not high enough to burn out the mechanical seal.
The temperature of the sealing surface rises mainly in two ways: one is the heat conduction from the material inside the pump (that is, the heat absorbed by the seal)； The second is the heat generated by friction at the sealing surface (i.e., frictional heat). Based on your description, the mechanical seal is cooled by cooling water, which should allow most of the heat and frictional heat to be removed, unless the cooling water is not turned on or its flow rate is too low.
Materials at 90 degrees definitely won’t burn; whether the materials contain impurities, what is the quality of the cooling water, and whether the sealing and flushing scheme is appropriate. Simply because of the material temperature, it certainly won’t cause the seal to burn out.
No, if the pump seal burns out, it indicates that the temperature is too high; the most likely cause is dry grinding
Under normal operating conditions, the machine seal will not burn out; it’s either due to too low a flow rate of cooling water. During the dry grinding process, it’s unlikely for the cooling water to stop flowing. Also, check whether the machine seal is properly adjusted – an improper adjustment can accelerate its wear and generate excessive heat that may cause damage. (The moving ring is tightened too much)
Make it clear that it’s not possible, but dry friction during operation without liquid, or blockage of the seal water, could lead to poor cooling.
Check whether the cooling water pipes are blocked, and ensure that the compression level is within the acceptable range; only then will dry grinding of the mechanical seal occur