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DIN EN 12756:2001
Mechanical seals - Principal dimensions, designation and material codes; English version of DIN EN 12756
The document defines the principal dimensions for the internal installation of single and double mechanical seals with rotating spring units into the pump sealing cavity according to ISO 3069:1974 as minimum cavity dimesions as typical for centrifugal pumps in accordance with ISO 2858 and EN 733. It also gives the seal designations and material codes to be used.
Deutsches Institut für Normung [din]