# Oring Pull Out Prevention

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The stiction effect occurs when the valve has been closed for a long period of time and when the valve has cooled down after heating up in the closed position.

The surface finish and the chemical properties of the process can intensify this effect.

It is possible that the O-ring of the sealing ring is pulled out of the groove, this leads to a loss of the sealing function.

The subsequent movement of the disc damages the O-ring. Immediate service is necessary.