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External
Mechanical Seals

External Mechanical Seal

External Mechanical Seal

External mechanical seals can be used to convert a packed pump to seal operation in the event that the stuffing box has too small a diameter to accommodate a normal seal. The seal operates in reverse mode and it is the seal spring pressure that keeps the seal faces closed. This means that the seal has a limited application because the differential pressure across the seal is limited. Refer to the manufacturer’s instructions for full details but be aware that the seal can “blow” open, if the seal is over pressurized.


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