bellows seal pneumatic fluorine lined control valve

Body: WCB, SS316,SS316L+PTFE or PFA
Ends: Flange
Seat: PTFE
Size: 1/2″ – 12″ (15mm – 300mm)
End connections:
ASME B16.34 class 150

    Category: Control valve


    The single-seat fluorine lined control valve utilises a full ptfe lined body and trim structure to effectively combat the corrosion caused by aggressive media. Through serrated machining of the metal body cavity, the lining materials seamlessly mesh with the metal, enhancing the longevity and efficacy of the lining. The stem seal, employing a compound seal of F46 bellows seal and V type PTFE packing, ensures zero leakage risk from the stem to the external environment. Specifically tailored for extremely corrosive media in low-pressure and ambient temperature conditions, the unbalanced full lined control valve stands as the optimal choice.

    fluorine lined control valve

    Valve material

    • Valve body material: WCB,WCC,WC6, CF8, CF8M, CF3M+ ptfe or pfa
    • Valve cover material: WCB, CF8, CF8M, CF3M
    • Valve trim: SS316+ptfe or pfa
    • Packing: PTFE, graphite
    • Nominal diameter: 1/2“-10“ DN15-DN250
    • Nominal pressure: ANSI150, PN1.6
    • Body type: straight-through, angle

    Bonnet type:

    • standard,
    • heat dissipation,
    • bellows,
    • jacket insulation


    • flange FF, RF, RJ, TG,
    • MFM
    • Welding
    • SW

    Flow characteristics:

    • linear
    • Equal percentage

    Leakage level: 

    • hard seal (ASME B16.104 IV)
    • Soft seal (ASME B16.104 VI)

    Operating temperature:

    • Standard type -17~+230℃
    • Elongation type I (EI) -45~-17℃, +230~+566℃
    • Elongation type II (EII) -100~-45℃
    • Elongation type III (EIII) -196~-100℃


    • Pneumatic actuator: diaphragm type
    • Action mode: direct action, reverse action
    • Fault position: normally open, normally closed
    • Accessories: solenoid valve, electric positioner, limit switch, handwheel, position-keeping valve, air source filter
    • Electric actuator: intelligent regulating type and intelligent switching type
    • control signal:4-20mA


    What is PTFE lined control valves?

    PTFE lined control valves are specialized valves designed to manage the flow of highly corrosive or aggressive fluids within industrial processes. PTFE, or polytetrafluoroethylene, is a synthetic fluoropolymer known for its exceptional chemical resistance, low friction, and non-reactive properties. These characteristics make PTFE an ideal lining material for control valves used in demanding environments, such as chemical processing plants, pharmaceutical manufacturing, and petrochemical industries.

    fluorine lined control valve

    What industries are fluorine-lined control valves used in?

    PTFE lined control valves refer to a type of industrial valve specifically designed to handle extremely corrosive substances such as sulfuric acid, salt sulfur, and alkali. These fluorine-lined control valves are essential for industries dealing with chemical processing, petrochemicals, oil refining, and other similar fields where the handling of aggressive media is necessary.