The Mark 8000 Bellows stem seals eliminate fugitive emissions by surround the valve stem with a pressure-tight barrier, isolating the stem from the process fluid and preventing leakage to the atmosphere. For an extra measure of protection, the bellows stem seal option provides a back-up seal of Teflon, braided or Graphite/Grafoil packing.

Full compliance with the most stringent requirements of the Clean Air Act.