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In Piping Plan 03 there is circulation between the seal chamber and the pump created by the design of the seal chamber.
Piping Plan 03 is commonly used in pump designs where the seal chamber has a tapered bore and no throat bushing. This seal chamber geometry or flow enhancement features in the seal chamber create circulation that provides cooling for the seal and vent air or vapors from the seal chamber. This plan is most often used in applications where there is not significant seal generated heat. It is also used in applications where there may be solids that could collect in a traditional seal chamber.
NOTE This piping plan is most commonly used with Category 1 seals.
Malavazi NOTE: For liquids with crystallization characteristics, Quench is recommended due to micro leakage on the faces, otherwise plug the injection connection (flush inlet) leaving the drain free to prevent environmental disasters, since the floating ring will act as a safety point.