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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

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

Wafer Butterfly Valve

Structural Features

• Ultra-thin, compact, and lightweight valve body

• No built-in flange; clamped to the pipe flange via double-ended bolts passing through the valve body

• On/off or regulation via rotation from 0° to 90°

Advantages

• Small size and light weight, easy installation

• Low cost, cheaper than flanged valves

• Small footprint, suitable for compact piping

• Quick opening and closing, effortless operation

Flanged Butterfly Valve

Basic Structure and Principle

• Core Components: Valve body (with flange), butterfly plate, valve stem, sealing seat, drive unit.

• Working Principle: The disc-shaped butterfly plate rotates 0°~90° around the valve stem to achieve full open/full close or flow regulation.

• Connection Method: Flange connection

Key Features

• Reliable Sealing: Flange connection + independent sealing system, leak-proof.

• Higher Pressure Resistance: Suitable for medium and high pressure (PN6~PN40).

• Quick Opening and Closing: Opens and closes with a 90° rotation, effortless operation.

• Low Flow Resistance: Low flow resistance coefficient when fully open, suitable for high flow rates.

• Easy Maintenance: Easy disassembly; seals are replaceable.

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+86 19858780995

+86 19858780995

+86 19858780995

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