poster
HomeProductsButterfly ValvesButt Welded Butterfly Valve
Butt Welded Butterfly Valve

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.

Product Description

Drive Methods

 

• Turbine Drive, Welded Triple Offset Hard Seal Butterfly Valve (Most Commonly Used)

• Pneumatic Welded Butterfly Valve

• Electric Welded Butterfly Valve

 

Applicable Operating Conditions

 

• Pressure: PN16, PN25, PN40, PN63, Class 300/600

• Temperature: -20℃ ~ 600℃ or even higher

• Typical Media:

◦ High-temperature steam

◦ Heat transfer oil, hot oil

◦ High-temperature gas, hot air

◦ High-pressure water, oil products

◦ Flammable, explosive, and toxic media (requiring absolute leak-proof operation)

Online Inquiry

Related Products

Flanged Butterfly Valve

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.

Centerline Rubber-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

Fluorine-Lined Butterfly Valve

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

Wafer Butterfly Valve

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

+86 19858780995

+86 19858780995

+86 19858780995

+86 19858780995

19858780995@163.com