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Fluorine-Lined Butterfly Valve

Core Structure

• Generally a center-line soft-seal structure

• The valve body is entirely lined with a layer of F4 (PTFE), F46, PO, etc.

• The butterfly plate is also PTFE-lined

• The valve stem is usually made of stainless steel to prevent media corrosion

• Connections are mainly wafer type and flange type

• Drive methods are mainly handle, turbine, electric, and pneumatic

Commonly Used PTFE Lining Materials

• PTFE (Polytetrafluoroethylene/Teflon) Resistant to strong acids and alkalis, high temperature, and almost all chemicals

• FEP (F46) Better processability, corrosion resistance close to PTFE

• PFA High temperature resistance, stronger corrosion resistance, higher price

• PO/Polyolefin High cost-performance ratio, suitable for general corrosive conditions

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Product Description

Product Advantages

• Superior corrosion resistance: Resistant to sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, strong alkalis, organic solvents, etc.

• Reliable sealing, virtually zero leakage

• No scaling or media adhesion, smooth flow path

• Wide applicable temperature range: -50℃～180℃

• Significantly lower cost compared to stainless steel and Hastelloy valves

Applicable Media

• Strong acids: Sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, phosphoric acid

• Strong alkalis: Liquid alkali, sodium hydroxide, potassium hydroxide

• Various organic solvents, brine, corrosive wastewater

• Electroplating, pickling, pesticides, chemical synthesis media

Not suitable for: High-temperature steam, slurries containing hard particles, highly abrasive conditions

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Related Products

Fluorine-Lined Butterfly Valve

Centerline Rubber-Lined Butterfly Valve

Structural Features

• Centerline Structure: The valve stem axis, butterfly plate center, and valve body center are on the same centerline.

• Integral Rubber Lining: The entire valve body interior and butterfly plate outer ring are covered with rubber.

• Fully Soft Seal: Sealing is achieved through rubber elasticity; a seal is achieved when the valve is fully closed.

• Connection Methods: Wafer type, flange type

• Drive Methods: Handle, turbine, pneumatic, electric

Butt Welded Butterfly Valve

Structural Features

• No flanges or clamps; valve body directly welded to the pipeline.

• High overall rigidity, completely eliminating leakage at the connection surface.

• Mostly triple eccentric metal hard seal structure.

• Reliable seat seal, capable of bidirectional pressure resistance.

Advantages

• Zero external leakage: welded connection, no risk of gasket leakage.

• Resistant to high temperatures, high pressures, and vibrations, suitable for harsh working conditions.

• Smaller and lighter than flanged types.

• Long service life, requiring almost no maintenance at the connection.

Ventilation Butterfly Valve

Basic Features

• Structure: Large diameter, lightweight valve body, single eccentric or center plate type

• Sealing: Generally not tight, slight leakage is allowed (soft seal is also possible)

• Pressure: Mostly low pressure, normal pressure

• Actuation: Handle, worm gear, electric, pneumatic are all available

• Connection: Mostly flange type, but also wafer type

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+86 19858780995

+86 19858780995

+86 19858780995

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