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Globe/Cage Guided Control Valves

 Fractional Flow Control Valves > Mark 8000 Series



Mark 8000 Bellows Stem Seal 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.

Features & Benefits




Full compliance with the most stringent requirements of the Clean Air Act
Secondary packing chamber with a bellows leak monitoring port for additional security
Two-piece stem allows stem adjustment without breaking the bellows bonnet extension seal
  Barstock, not cast, construction to avoid potential porosity issues