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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

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Product Description

Sealing Types

• Soft Seal (X/EPDM/NBR) Normal temperature, low pressure, water, air, sewage, zero leakage

• Hard Seal (H/Metal Seal) High temperature resistance, wear resistance, steam, high temperature gas

Actuation Methods

• Manual: Handle (small diameter), turbine (labor-saving)

• Electric: On/off type/regulating type, remote automatic control

• Pneumatic: With cylinder, rapid action, explosion-proof scenarios, etc.

Applicable Operating Conditions

• Pressure: Mainly PN6, PN10, PN16

• Temperature: Generally ≤ 120℃ (soft seal)

• Medium: Water supply and drainage, HVAC, circulating water, gas, sewage, etc.

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Related Products

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

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

Triple Offset Butterfly Valve

What do the three eccentricities refer to?

1. Valve stem axis is off-center from valve body center

2. Valve stem axis is off-center from sealing surface center

3. Sealing cone axis is tilted at an angle

Core effects:

• Almost no friction between the disc and valve seat during opening and closing

• The sealing surface tightens as it closes, resulting in minimal wear on the sealing surface

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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