What are short term and long term problems caused by leaking seals?

For wet seals, a leaking seal puts more barrier fluid into the batch contaminating it. The barrier fluid will leak into the atmosphere and onto the vessel head making a mess. Eventually the lubricator will run dry and the seal will fail and no longer hold the vessel contents which could contaminate the atmosphere. For dry seals a leaking seal consumes a lot of nitrogen. The seal will wear out putting a lot of nitrogen into the vessel and possibly over-pressurizing the vessel, especially small CTJ vessels (100 gallons or less). For face seals, a large amount of fine carbon dust will enter the vessel, contaminating the batch. Eventually the seal wears out, the barrier gas pressure cannot be maintained and the vessel contents will enter the atmosphere.