What Material Is Used for Butterfly Valve Liner?

Liner material is one of the most important parts of a rubber lined butterfly valve, but it’s also one of the most overlooked.

This guide breaks down the most common liner materials, including when to choose EPDM, NBR, or more specialized rubbers, and how they fit into different valve types like double flanged rubber lined butterfly valves and a type rubber lined concentric butterfly valve.

What the Liner Actually Does

A butterfly valve liner does more than protect the valve body. It creates the seal, resists corrosion, and determines maintenance cycles. Choose the wrong material and you risk early failure, leaks, or costly downtime. For example, typical materials like EPDM, NBR, or natural rubber are used for general service, while more aggressive media call for special rubber compounds. Getting the liner right means getting the full value from your seal package.

Popular Liner Materials and Where They Work

Here are commonly used liner materials and what they’re best for:

• EPDM (Ethylene-Propylene Diene Monomer): Strong for water, moderate chemicals, good temperature range.
• NBR (Nitrile / Buna-N): Better for oils and hydrocarbons.
• Natural Rubber, Chloroprene (CR): Cost-effective for mild service; less resistant to harsh chemicals.
• Viton (FKM), Fluorinated Rubber: For aggressive chemicals, high temperature, long life.

For example, a type rubber lined concentric butterfly valve may use EPDM liner for clean water service. On the other hand, a double flanged rubber lined butterfly valves model designed for chemical duty might use Viton or a vulcanised linings with ebonite backing.

Why Choose a Rubber Lined Butterfly Valve?

Rubber lined butterfly valves offer several advantages:

• Excellent corrosion protection: The liner isolates the valve body from harsh media.
• Better sealing: Elastomer liner helps compensate for substrate imperfections and improves shut-off.
• Lower cost in many cases: Compared to metal-seated variants, when the media and service conditions allow.

If you’re looking for a Bray rubber lined butterfly valve or Dezurik rubber lined butterfly valve equivalent, you’ll find that many manufacturers offer these as standard options with EPDM or NBR liners for moderate service.

High-Performance Wafer Butterfly Valve

Delivering reliable flow control and tight shut-off. Features a compact, lightweight design ideal for industrial applications where space is limited. Compliant with international standards.

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How to Select the Right Liner for Your Valve

When specifying a rubber lined butterfly valve, consider:

• Fluid type & chemistry: Identify pH, abrasiveness, and presence of solvents.
• Temperature & pressure: Ensure the elastomer liner can handle the expected range without aging or degrading.
• Body and end connection style: For example, a Chinese supplier offering a “china rubber lined butterfly valve” might provide wafer, lug or double-flanged body styles for versatility in piping.
• Maintenance and service life: Understand liner wear rates and ease of replacement for long-term value.

Rubber Lined Butterfly Valve: Final Thoughts

When you specify a rubber lined butterfly valve, match the liner to your process, environment, and maintenance expectations. If you need further help, visit our product catalogue to explore rubber lined butterfly valves with various liner options and body styles, or contact us for more details!