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  4. Seal Support Systems for Pumps
  • PG 72/74

    PG 72/74 systems are used to provide a clean, regulated gas supply to either a dual unpressurized or pressurized seal arrangement. A gas, typically nitrogen, is introduced in the area between the inner and outer seals, thus preventing fugitive emissions from escaping to the atmosphere.

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  • PL 54/55

    PL 54/55 lubrication systems provide a positive flow and pressure of pressurized or unpressurized barrier/ buffer fluid to dual seals. This seal support system type is typically preferred where flow and heat removal capacity exceeds that of API Plan 52 or 53 seal support systems.

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  • PR 52/53A & PA 53B

    These reservoir-based seal support systems are designed for API Plan 52/53A and 53B applications to support unpressurized and pressurized dual seals. Circulation to buffer or barrier fluid is achieved with a pumping ring (or optional circulating pump). A range of heat exchangers can be packaged with this system.

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