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PTFE PFA Lined Flange Butterfly Valve
Flange Butterfly Valve
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PTFE PFA Lined Flange Butterfly Valve

When the process media would degrade most elastomers, integrity depends on an inert barrier. Engineered for severe chemical duty, flange butterfly valve features a PTFE-fully lined flow path—body and disc—creating a complete corrosion-resistant seal that isolates the fluid from all metal components.

KEFA VALVE manufacture full PTFE lining flange butterfly valve specifically for handling aggressive acids, alkalis, solvents, and high-purity fluids. The PTFE lining offers exceptional chemical inertness and a smooth, non-stick surface, ensuring reliable shut-off and minimal contamination in the most demanding applications.

Constructed for Chemical Integrity:

Lining: Body and disc are fully encapsulated or lined with virgin PTFE, providing a uniform, gapless barrier.

Body: Ductile iron, Carbon steel or stainless steel exterior, with PN6/10/16 150LB flanged connections.

Sealing: PTFE-to-PTFE seating surface ensures leak-tight closure and broad chemical compatibility.

Temperature Range: Suitable for service from -20°C to +180°C (dependent on concentration and pressure).

Produced under controlled conditions to maintain liner integrity. Each valve undergoes individual hydrostatic shell and seat testing to guarantee performance before leaving our facility.

The valve solution for corrosive fluid handling in chemical, pharmaceutical, and electroplating processes. Available as a standard design or configured to your specific pressure and media requirements. Request a chemical resistance chart or a detailed technical datasheet.

Series: KF-SFL-P

Type: Concentric Resilient Seated

Size: DN50-1000mm, NPS 2”- 48”

Design Standard: EN 593, API 609

Pressure Rating:  PN6/PN10/PN16/150LB

Certificate: ISO, CE, WRAS, ACS

Sample: Available

Service: OEM & ODM

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    Features
    Specifications
    Dimension

    Features

    Double Flange Type

    Simple structure & Stable connection

    Seat Design

    PTFE/PFA Lined

    Operation Cycles

    Over 50,000 times

    Leakage Level

    Bubbles-tight sealing with no leakage

    Low Torque

    Operation easy and flexible

    Bidirectional Sealing

    Any installation position

    Low Flow Resistance

    Improve fluid efficiency and reduce energy consumption

    Coating Grade

    Conventional and special conditions of C1-C5 & CX

    Application

    Highly corrosive, toxic medium, acid, alkali, ultrapure water

    Certificates

    ISO9001, CE, WRAS, ACS

    Specifications

    Design Standard

    EN 593, API 609

    Top Flange Standard

    ISO 5211

    End Flange Standard

    EN 1092 PN6/10/16, ANSI 125LB/150LB

    Face to Face Dimension

    API 609, EN558-1 Series 13

    Testing Standard

    API 598, EN12266

    Temperature

    -10℃~150℃(depends on the sealing material)

    Body Material

    Ductile Iron, Carbon Steel, Stainless Steel

    Disc Material

    CS+PTFE/PFA, SS+PTFE/PFA

    Shaft Material

    SS410/SS416/SS420, SS431, 17-4PH, F304/F316/F51/F53, K500

    Seat Material

    PTFE, PFA

    Operator

    Lever, Gearbox, Pneumatic, Electric Actuator

    Dimension

    PTFE PFA Lined Flange Butterfly Valve
    Size L □T/Ф PN10 PN16 ANSI  150LB Top       Flange
    Ф D n - Ф d n - M Ф D n - Ф d n - M Ф D n - Ф d n - UN
    DN50 108 9*9 125 4-19   125 4-19   120.7 4-20   F07
    DN65 112 9*9 145 4-19   145 4-19   139.7 4-20   F07
    DN80 114 9*9 160 8-19   160 8-19   152.4 4-20   F07
    DN100 127 11*11 180 8-19   180 8-19   190.5 8-20   F07
    DN125 140 14*14 210 8-19   210 8-19   215.9 8-23   F07
    DN150 140 14*14 240 8-23   240 8-23   241.3 8-23   F07
    DN200 152 17*17 295 8-23   295 8-23 4-M20 298.5 8-23   F10
    DN250 165 22*22 350 8-23 4-M20 355 8-28 4-M24 362 8-26 4-7/8"-9UNC F10
    DN300 178 22*22 400 8-23 4-M20 410 8-28 4-M24 431.8 8-26 4-7/8"-9UNC F10
    DN350 190 22*22 460 12-23 4-M20 470 12-28 4-M24 476.3 8-29 4-1"-8UNC F10

    Product display

    PTFE PFA Lined Flange Butterfly ValvePTFE PFA Lined Flange Butterfly Valve


    The flange butterfly valve body and disc, lined with fluoroplastics such as PTFE and PFA, prevent direct contact with the medium, offering unparalleled resistance to corrosion, permeation and microbial contamination. This delivers higher purity and reliability with minimal maintenance.

    • ●A multi-axial sealing system comprising components like elastic disc springs ensures reliable performance, enabling long-term maintenance-free operation.
    • ●Precision machined PTFE seats and disc plates on CNC lathes guarantee accurate dimensional fit, delivering lower operating torque and extended service life.
    • ●Streamlined disc plate design accommodates increased flow requirements.
    • ●High-strength alloy steel valve shafts safeguard overall valve performance.

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