API 682 PLAN 53A
API 682 Plan 53A is used to prevent all leakage produced from the primary inboard seal of a dual pressurized wet mechanical seal arrangement.
The reservoir (seal pot) contains a clean compatible barrier fluid that is pressurized with an inert gas, typically Nitrogen to a minimum pressure of 20 psig above the seal chamber pressure. The maximum gas charging pressure is 150 psig, this limit reduces the likelihood of gas entrapment in the barrier fluid which can have a negative effect of seal performance. This pressurized system will promote the higher pressure barrier fluid to migrate into the process through the primary inboard sealing faces. Transmitters are used to monitor barrier fluid level and reservoir pressure.
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*All materials used per ASME Section VIII Div. 1