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In Piping Plan 14 there is recirculation from pump discharge through a flow control orifice to the seal and simultaneously from the seal chamber through a flow control orifice (if required) 'to pump suction. This allows fluid to enter the seal chamber and provide cooling while continuously venting the pressure in the seal chamber. Piping Plan 14 is a combination of Piping Plan 11 and Piping Plan 13.
NOTE: Piping Plan 14 is most commonly used on vertical pumps.
A distributed flush injection is not recommended with a Piping Plan 14.
Malavazi NOTE: For liquids with crystallization characteristics, Quench is recommended due to micro leakage on the faces, otherwise plug the injection connection leaving the drain free to prevent environmental disasters, since the floating ring will act as a safety point.