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Questions about the Trouble of Magnetic Seals

The chamber will not pump down.

There are three possible causes:
(1) The leakage from the Magnetic Seal - Seal failure
(2) The leakage from the gasket for the mounting Magnetic Seal
(3) The leakage from some other points

If you think the problem might be (1) above, please contact us.

The pressure in the vacuum equipment is unstable.

First, the cause of unstable operation needs to distinguish the Magnetic Seal or other components.
Please check the relationship between the rotation of the Magnetic Seal and the pressure change,
and tell the condition to us.

note: When you operate the Magnetic Seal which has not been turned for two weeks or more, the instantaneous pressure rise (or 'pressure spike') might occur. This behavior of the Magnetic Seal is normal.

The rotating torque of the Magnetic Seal increased than before.

There are six possible causes:

(1) The Magnetic Seal has been left without rotation for a long time.
(2) It is winter, or the room temperature is low.
(3) Products or by-products of the chemical process have been deposited on the seal gap of the Magnetic Seal.
(4) Foreign substance has gotten mixed in with standard magnetic fluid of the Magnetic Seal.
(5) The bearing grease has deteriorated.
(6) The bearing is damaged.

In the case of (1) or (2) above, it may be recoverable by pre-conditioning operation.
About pre-conditioning operation, please see "What is pre-conditioning operation of the Magnetic Seal?" in the FAQ.
If the Magnetic Seal's condition does not recover after pre-conditioning operation, please contact us.

The Magnetic seal cannot rotate.

It need to be overhauled by Rigaku. Do not disassemble it yourself.
Ship it to Rigaku or contact us, please.

The Magnetic Seal has come into contact with water/organic solvents.

Please inform us about the kind and the quantity of the solvents.
Depending on this information, Rigaku decides whether the Magnetic Seal need to be overhauled.

I dropped the Magnetic Seal.

Please inform us about the extent of damage.
Depending on this information, Rigaku decides whether the Magnetic Seal need to check be overhauled.

I found liquid spilled from the Magnetic Seal.

Stop the equipment immediately and tell us the details, please.

The Magnetic Seal is making an abnormal noise.

Stop the equipment immediately and tell us the details, please.


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