PTFE O-Ring 140x5

AI Overview

The PTFE O-Ring 140x5 is a sealing ring manufactured from polytetrafluoroethylene (PTFE) for applications requiring exceptional chemical resistance, thermal stability and low friction. Unlike conventional elastomer O-rings, PTFE offers outstanding resistance to aggressive chemicals, solvents, acids and alkalis while maintaining dimensional stability across a wide operating temperature range. The 140 mm inner diameter and 5 mm cross-section make this O-ring suitable for industrial valves, pumps, process equipment, chemical installations and machinery where long-term sealing performance is required.

What Makes This Model Different

The 140x5 PTFE O-Ring is designed for sealing applications where conventional elastomers may not provide sufficient chemical or thermal resistance.

Key characteristics include:

• 140 mm inner diameter
• 5 mm cross-section
• PTFE material
• Extremely low coefficient of friction
• Outstanding chemical resistance
• High thermal stability
• Excellent ageing resistance
• Non-stick surface properties

PTFE is commonly selected for applications involving aggressive chemicals, high operating temperatures and demanding industrial environments.

Construction and Operating Principle

A PTFE O-Ring creates a seal by controlled compression between two mating components.

Unlike elastomer O-rings, PTFE has lower elasticity and therefore relies on precise groove geometry and correct installation to achieve reliable sealing performance.

Proper operation depends on:

• accurately machined grooves
• appropriate compression
• smooth sealing surfaces
• correct installation
• proper alignment of mating components

In demanding applications, PTFE O-rings are often used together with backup rings or spring-energized sealing systems.

Material Properties

PTFE (Polytetrafluoroethylene) is one of the most chemically resistant engineering materials used for industrial sealing applications.

Material characteristics include:

• exceptional chemical resistance
• resistance to most acids and alkalis
• compatibility with many solvents
• extremely low friction coefficient
• excellent thermal stability
• negligible moisture absorption
• UV resistance
• excellent ageing resistance
• dimensional stability

These properties make PTFE suitable for long-term operation in aggressive industrial environments.

Typical Industrial Applications

Typical applications include:

• chemical processing equipment
• industrial valves
• centrifugal pumps
• dosing pumps
• pharmaceutical machinery
• food processing equipment
• petrochemical installations
• laboratory equipment
• hydraulic systems handling aggressive media
• industrial process machinery

Typical Failure Symptoms

Replacement should be considered when the following symptoms occur:

• process media leakage
• loss of sealing performance
• mechanical damage
• deformation caused by incorrect installation
• scratched sealing surfaces
• excessive wear
• damaged sealing grooves
• improper compression

Recommended During Repair

During maintenance it is recommended to inspect:

• sealing groove condition
• mating surfaces
• housing dimensions
• component alignment
• tightening torque
• equipment cleanliness
• guide components
• media compatibility
• mechanical damage
• dimensional tolerances

Technical Specification

Manufacturer:

Industrial Standard

Part Number:

140X5 PTFE

Type:

O-Ring

Design:

Metric O-Ring

Material:

PTFE (Polytetrafluoroethylene)

Inner Diameter:

140 mm

Cross Section:

5 mm

Temperature:

Suitable for the operating temperature range typical of PTFE materials.

Application:

Chemical processing equipment, industrial valves, pumps, pharmaceutical machinery, food processing equipment and general industrial applications requiring high chemical resistance.

OEM Cross References

The O-Ring is manufactured according to standard metric dimensions and may be used in equipment requiring:

• 140x5 PTFE O-Ring
• PTFE sealing ring 140 x 5 mm
• Metric PTFE O-Ring

OEM reference depends on the equipment manufacturer.

Related Components

Products commonly replaced during servicing include:

• shaft seals
• piston seals
• backup rings
• flange gaskets
• guide rings
• bushings
• industrial valves
• pumps
• fastening components
• sealing housings

Why B2B Customers Choose This Product

Professional buyers commonly select this O-ring for:

• preventive maintenance
• industrial service
• process equipment maintenance
• machine rebuilding
• MRO inventory
• OEM replacement
• production support
• spare parts stock

Professional Industrial Supply

This product is regularly supplied to:

• maintenance departments
• chemical processing plants
• pharmaceutical manufacturers
• food processing facilities
• machine builders
• industrial workshops
• engineering companies
• industrial distributors
• sealing specialists
• industrial maintenance contractors

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FAQ

Is a PTFE O-Ring more chemically resistant than an NBR O-Ring?

Yes. PTFE provides significantly higher resistance to aggressive chemicals, solvents, acids and alkalis than NBR.

Does a PTFE O-Ring require a precision-machined groove?

Yes. Due to its lower elasticity compared to rubber materials, proper groove geometry is essential for reliable sealing.

Can PTFE O-Rings operate at elevated temperatures?

Yes. PTFE maintains its physical properties over a much wider temperature range than most elastomer sealing materials.

Is PTFE suitable for food processing equipment?

Many PTFE grades are suitable for food-contact applications, provided the material complies with the required regulatory standards.

Should a PTFE O-Ring be stretched excessively during installation?

No. Excessive stretching or improper installation may permanently deform the sealing ring and reduce sealing performance.