Magnetic sealing and mechanical sealing
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I ordered a mixer, and the manufacturer suggested a magnetic seal. What exactly is a magnetic seal? What is the difference between it and a mechanical seal? And what are the advantages and disadvantages of each?
Magnetic sealing undoubtedly offers higher safety performance, but its drawback is that it is difficult to determine its actual operating condition. What to do about demagnetization? In reality, the motor reducer keeps running idle; the agitator inside doesn’t rotate or doesn’t reach the speed you want.
A magnetically driven stirrer will work too; no sealing is required
There are holes on the casing through which it can be seen whether it is rotating or not
Magnetic sealing uses magnetic machinery, and its price is much higher than that of mechanical types. The mechanism is traditional: the motor drives the impeller or blades together with the bearings. In a magnetic drive system, there are two completely separate sleeves; the outer sleeve rotates, and this rotation drives the inner sleeve through magnetism, with no direct diameter contact between them. The advantage of magnetic drives is that they use static sealing instead of dynamic sealing, resulting in better sealing performance and preventing air leakage due to wear. It’s much more expensive
Magnetic seals can operate at high pressures, with values of 10 to 20 MPa or more being possible
Are you sure you didn’t get the pressure unit wrong? ? ?
Of course, the magnetic seal can withstand a design pressure of 24.5 MPa
I heard about magnetic sealing for the first time; I’m learning about it.*
It should be called magnetic drive, right? Sealing is not required.
Is it similar to a magnetically driven pump in principle? No leakage at all – no need for sealing?