PPC Plan 53B

PPC’s API Plan 53B is a pressurized seal reservoir system utilizing an accumulator to maintain a uniform pressure differential across the inboard seal faces of a dual seal given a loss of barrier fluid through upset conditions or normal consumption during long term operation. The system is coupled with a dual mechanical seal with a barrier fluid between them. The barrier fluid in the system is pressurized to a higher pressure than the seal chamber, normally 15 to 30 psig (1 to 2 bar).