Zhengzhou Success Machinery Co.,ltd - Professional valve manufacturer

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Address:98-1 Dengfeng Road, Shangjie District, Zhengzhou City, Henan Province

Rubber Lined Butterfly Valve

1、Size range:DN80mm-4000mm 2、Pressure:PN10/16/25/40 3、Body:GJS500-7/WCB+Rubber 4、Disc: GJS500-7/WCB+Rubber We have a professional and experienced service team, and our cooperation will take your career to a higher level.

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Butterfly Valve

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sales@successmach.com

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Description

The rubber lining within rubber-lined butterfly valves is achieved by vulcanising the rubber and valve body together at high temperatures, exhibiting the following notable characteristics:

1. Corrosion Resistance

This represents the most prominent advantage of rubber-lined butterfly valves. The rubber lining (commonly EPDM, NBR, FKM, etc.) completely isolates the fluid medium from the metal substrate. Whether exposed to acidic, alkaline, or saline solutions, various industrial effluents, or seawater, the rubber lining provides reliable protection, effectively resisting chemical corrosion and significantly extending valve service life. It is particularly suitable for corrosive environments such as chemical processing, metallurgy, water treatment, and environmental protection.

2. Superior Sealing Performance

The inherent elasticity and excellent conformability of rubber materials enable the rubber lining on the butterfly disc to compress tightly against the seat when the valve closes, forming a reliable seal. This soft-seal design typically achieves zero-leakage standards (e.g., ANSI Class VI), effectively preventing internal or external leakage of the medium while ensuring system safety and environmental compliance.

3. Low Flow Resistance, Energy-Efficient Operation

The structural characteristics of butterfly valves ensure minimal obstruction to the medium when fully open, with a near-straight flow path and an extremely low fluid resistance coefficient. This significantly reduces pump energy consumption during fluid conveyance, enhancing overall system operational efficiency—a benefit particularly pronounced in large-diameter pipelines.

4. Compact structure, low cost

Compared to gate valves or globe valves, butterfly valves feature a simpler, more compact design with fewer components. Rubber-lined butterfly valves, while meeting corrosion resistance requirements, are typically significantly lighter than fully metallic corrosion-resistant alloy valves (such as Hastelloy valves) or fluoroplastic-lined valves. They occupy less installation space and offer greater cost-effectiveness in material and manufacturing expenses, delivering outstanding value for money.

5. Effortless Operation and Simplified Maintenance

Butterfly valves typically require only a 90-degree rotation for opening or closing. When paired with worm gear, pneumatic, or electric actuators, they enable rapid actuation and precise flow regulation. The rubber seat possesses inherent wear compensation capabilities. Should maintenance necessitate replacing the seat or lining, the process is relatively straightforward and economical.

In summary, rubber-lined butterfly valves occupy a significant position in numerous industrial fluid control applications involving corrosive media or requiring cost-effective solutions. This is due to their outstanding corrosion resistance, reliable sealing, energy efficiency from low flow resistance, compact lightweight construction, and favourable economics. They strike an ideal balance between performance, cost, and practicality, making them an indispensable ‘practical choice’ valve option in modern piping systems.