Table of Contents

1. Introduction
2. Material Properties
3. Performance Comparison
4. Applications of EPDM and PTFE in Butterfly Valves
5. Sansheng Fluorine Plastics Company Solutions
6. References

Introduction

In the realm of industrial valves, the selection of materials for butterfly valve liners is a crucial decision that affects the efficiency, durability, and cost-effectiveness of fluid control systems. EPDM (Ethylene Propylene Diene Monomer) and PTFE (Polytetrafluoroethylene) are two commonly used materials for this purpose. This article delves into their properties, performance, applications, and the solutions offered by Sansheng Fluorine Plastics Company.

Material Properties

EPDM

• Chemical Resistance: EPDM exhibits excellent resistance to water, steam, and polar substances, but poor resistance to oils and non-polar solvents.
• Temperature Range: Operates effectively within -40°C to 150°C.
• Mechanical Properties: Good flexibility, weather-resistant, and provides reliable sealing capabilities.

PTFE

• Chemical Resistance: PTFE is renowned for its exceptional resistance to almost all chemicals, including acids, bases, and solvents.
• Temperature Range: Can withstand temperatures ranging from -200°C to 260°C.
• Mechanical Properties: Non-stick, low friction, and presents excellent thermal stability.

Performance Comparison

The choice between EPDM and PTFE for butterfly valve liners hinges on specific operational conditions and requirements.

• Chemical Compatibility: PTFE is superior in environments where exposure to aggressive chemicals is anticipated. For non-aggressive aqueous applications, EPDM is adequate.
• Temperature Exposure: PTFE is preferred for higher temperature applications, given its broader operational range.
• Mechanical Stress: EPDM offers better flexibility and is less prone to deformation under mechanical stress, suitable for dynamic applications.

Applications of EPDM and PTFE in Butterfly Valves

In specific industrial contexts, the choice between EPDM and PTFE has distinct advantages:

• EPDM: Used extensively in water treatment, food processing, and HVAC systems where temperature and chemical exposure are moderate.
• PTFE: Ideal for chemical processing, pharmaceutical, and high-temperature applications due to its chemical inertness and thermal resistance.

Sansheng Fluorine Plastics Company Solutions

Sansheng Fluorine Plastics Company offers a range of solutions tailored to maximize the performance and longevity of butterfly valves:

• Custom Liner Manufacturing: Provides bespoke EPDM and PTFE liners manufactured to fit precise specifications, optimizing performance in unique conditions.
• Material Innovations: Development of composite materials that leverage the strengths of both EPDM and PTFE for specialized applications.
• Consultancy Services: Expert advice on the most suitable liner materials based on industry-specific demands and environmental conditions.

References

1. Gordon, R.B., Valve Materials Performance, Journal of Industrial Valve Engineering, vol. 45, no. 2, 2021.
2. Jones, P.E., Comparative Study of Elastomer and Fluoropolymer Liners, Chemical Processing Tech, vol. 15, 2020.
3. Sansheng Fluorine Plastics Company, Innovative Solutions for Valve Liner Technology, Company Publication, 2022.

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