How to fix the leakage at the seal of the sulfuric acid pump
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The mechanical seal of the sulfuric acid pump in the workshop has been leaking recently, and the exact cause is unknown. It is initially suspected that when a sulfuric acid pump was used to add sulfuric acid to the tank, a slight negative pressure was created inside the pump chamber, which over time led to wear of the mechanical seal. Because when using a sulfuric acid pump to feed the material, it is usually necessary to first run the pump in circulation, then gradually open the valve for adding sulfuric acid; any air present in the pipes is expelled into the sulfuric acid tank through the pump. Sea friends, how can we solve this problem? Is a new diaphragm pump being added specifically for adding sulfuric acid?
Do you have some time? Is that what you mean? The valve does not open in time
Either a fluorine-lined magnetic pump or a PTFE diaphragm pump will work
Without addressing the root cause, magnetic pump should not be used rashly, otherwise more core components will be damaged.
Is the feed at atmospheric pressure or with backpressure? If the volume is small, use atmospheric pressure feeding and install a surge tank.
Magnetic pumps can be used; I have similar application cases.
It’s not good to feed sulfuric acid directly into the pump; it can be placed after the pump, for example on the return pipeline.
For mechanical seals, use PTFE material to ensure the purity of the medium
Mechanical seal leakage is usually caused first by damage to the front-segment seals; it is recommended to examine the structure of the mechanical seal to see if any of the seals have been oxidized and damaged as a result of exposure to sulfuric acid. Additionally, since the pump likely uses a single-end mechanical seal, it is possible that the backflow valve is set too narrowly, resulting in excessive pressure inside the pump chamber and thus damaging the seals. One solution could be to reduce or eliminate the backflow valve’s operating time, relying instead on static pressure for exhaust
A lined magnetic pump will do; just exhaust the air before use