Are all pumps that use a 54 flushing scheme equipped with double-end face seals? ? ?
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The pump we used on site for the 54 flushing procedure was of the back-to-back type when its mechanical seal was being replaced. By checking API682, it was found that the 54 procedure is intended for flushing double-faced mechanical seals; therefore, does every 54 flushing application apply to double-faced seals?
Yes, Plan54 is used for double-faced mechanical seals, whether they are face-to-face, back-to-back, or in any other arrangement. Unless otherwise specified, API 682 prefers the face-to-face configuration as it is more compact. At the same time, it is also acknowledged that specially designed face-to-face and back-to-back configurations provide better sealing performance; obviously, they are also more expensive than back-to-back designs With a scheme like Plan 54, an oil sealing system is generally also required, with a dedicated oil sealing pump to supply sealant to this sealing system. Not very commonly used.