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Lined Plug Valves

FluoroSeal® Lined Plug Valves use high precision investment casting method for all major pressure holding components. The standard base model offers:

  • Carbon Steel body, plug and cover (ASTM A216 Gr. WCB).
  • Low porosity PFA (Perfluoroalkoxy) as standard liner
  • All cast parts have an acrylic based coating prior to lining for added protection from corrosion attack due to permeation

FluoroSeal® Lined Plug Valves feature an unpigmented virgin PFA lining applied by Transfer Molding and locked into castings by machined dovetail-shaped grooves, and cast dovetail-shaped recesses in body castings and cast holes.

  • Prevents liner collapse in vacuum conditions
  • Prevents blow out in high temperature and pressure combined conditions
  • Transfer Molding insures equal distribution and consistency of liner throughout the entire surface of the lined components as per ASTM F1545
  • No weak sections in the valve liner
  • All liner defects are directly visible

By design, Lined Plug Valves are cavity-free both in open and closed positions.

  • No particle accumulation
  • Ideal for corrosive slurry applications superior sealing capabilities

The interface between the tapered outer plug and the tapered inner body liner provides a 360° primary sealing area. Additional sealing levels are achieved by a delta ring and PTFE diaphragm, both protected by a metal diaphragm. The metal diaphragm assists in encapsulation, acts as an antistatic device, and is a metal seal to atmosphere, in case of PTFE failure.

  • Tight shutoff
  • Compression seal (upstream and downstream)
  • Bi-directional valve
  • Sealed at both plug and stem

FluoroSeal® Lined Plug Valves can be fitted with the state-of-the-art EZ-SEAL® adjustment mechanism, available on sizes 1/2” to 6”.

  • Single point frontal adjustment — no special tooling needed
  • 360° simultaneous and even compression of top seal and plug
  • Plug adjustment is linear, impossible to side load
  • Integrated Min/Max gauge offers a visual diagnostic of remaining service life and allows for easy maintenance planning
  • EZ-SEAL® design significantly reduces recordable leakage
  • EZ-SEAL® Bracket and Lock with multiple ISO mounting capabilities and five locking positions are offered in 304 SS as standard
  • ISO mount, explosion proof stem design


  • 2-Way
    • Class 150 lbs Flanged, 1/2" to 14"
    • PN 16, DN 25 to DN 150

To learn more about FluoroSeal Lined Plug Valves, or to get a quote...

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