Rubber-Coated PTFE Gaskets for Corrosive Media Sealing

Introduction to Rubber-Coated PTFE Gaskets

Rubber-coated PTFE gaskets combine the chemical resistance of PTFE with the elasticity of rubber, delivering reliable sealing in highly corrosive environments. Ideal for pipelines, valves, pumps, and equipment in chemical, pharmaceutical, food, and water treatment industries, these gaskets ensure long-lasting protection and easy installation.

Core Advantages

Dual-Layer Sealing Protection

• PTFE Core: Provides direct contact with the medium, offering top-level chemical resistance and anti-adhesion.

• Rubber Coating: Maintains continuous rebound under bolt stress, compensating for vibration and thermal expansion to achieve dynamic sealing.

Superior Chemical Resistance

• Resistant to strong acids, bases, organic solvents, and corrosive chemicals.

• Suitable for most chemical processes, significantly extending equipment life.

Excellent Mechanical Performance and Easy Installation

• Rubber outer layer ensures compression recovery and flexibility for easy installation and alignment.

• Effective sealing even on uneven flange surfaces, reducing installation difficulty.

Wide Temperature Range

• Operating temperature: -50°C to +200°C (depending on rubber type).

• Handles conditions from low-temperature cooling to high-temperature steam applications.

Cost-Effective and Low Maintenance

• More economical than pure PTFE gaskets.

• Reliable sealing reduces downtime, maintenance, and medium loss, lowering total operational costs.

Application Fields

Chemical & Petrochemical

Sealing for reactors, heat exchangers, towers, and pipelines transporting corrosive chemicals and solvents.

Pharmaceutical & Biotech

High-purity pipelines requiring resistance to disinfectants (CIP/SIP) and chemical corrosion.

Food & Beverage Processing

Sealing in equipment exposed to acidic foods, flavorings, and cleaning agents.

Electroplating & Surface Treatment

Acid baths, electrolytic cells, and exhaust systems operating in strong acid/base environments.

Water Treatment & Environmental

Pump and valve connections handling chemicals such as chlorine, acids, and alkalis.

General Industrial Equipment

Upgraded sealing for pumps, compressors, and valves (globe, ball valves, etc.).

Product Features and Details

Material Excellence

• Rubber coating options: FKM (high-temperature, oil-resistant) or NBR (general-purpose, cost-effective).

• Optimized filled PTFE core enhances corrosion resistance, creep resistance, and load-bearing capacity.

Precision Manufacturing

• Advanced molding ensures firm bonding between rubber and PTFE core.

• Seamless construction prevents delamination and maintains performance under repeated pressure cycles.

Versatile Standards

• Conforms to DIN, ASME, JIS, and other international flange dimensions.

• Custom sizes available per customer drawings.

Color Identification System

• Rubber types color-coded for easy identification: FKM (black/brown), NBR (blue).