The features of Soft Seal Butterfly Valve

Soft seal butterfly valves are commonly used in various industries due to their reliable sealing performance and cost-effectiveness. Here are the key features of soft seal butterfly valves:

Design Features

Soft Sealing Element

Made from materials like EPDM, NBR, PTFE, or other elastomers.

Provides tight shutoff and excellent sealing performance.

Quarter-Turn Operation

Operates with a 90-degree rotation, allowing for fast open/close functionality.

Disc-Centric Design

The disc is typically centered in the valve body, reducing wear and improving longevity.

Performance & Functionality

Bi-directional Sealing

Can seal in both flow directions, enhancing versatility.

Bubble-tight Shutoff

Ideal for applications requiring zero leakage under low to medium pressure.

Low Torque Requirement

Soft seat minimizes the torque needed for operation, allowing for smaller actuators or manual handles.

Good Flow Characteristics

Provides a relatively high flow capacity (Cv) and low pressure drop.

Construction & Material

Lightweight and Compact

Easier to install and maintain compared to gate or globe valves.

Corrosion Resistance

Seat materials and coating options (e.g., epoxy-coated body) can resist chemical and environmental corrosion.

Modular Design

Compatible with various actuator types (manual, electric, pneumatic).

Application Suitability

Ideal for Low to Medium Pressure Applications

Not recommended for high-pressure or high-temperature conditions.

Widely Used In:

Water treatment

HVAC systems

Food and beverage industry

Chemical processing

Fire protection systems

Limitations

Not suitable for abrasive or high-temperature fluids.

The soft seat may degrade over time with aggressive chemicals or UV exposure.

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