Metal Mesh Reinforced PTFE Gasket

Metal Mesh Reinforced PTFE gaskets offer superior structural strength compared to standard PTFE gaskets, with a pressure resistance of up to 6.4 MPa (64 bar); available mesh specifications range from #40 to #200 (SUS316 material). As a professional manufacturer, Taifno also offers FDA-compliant models suitable for the food and pharmaceutical industries.

Please provide the flange dimensions and mesh specifications, and we will provide a quotation within 24 hours.

What Is a Metal Mesh Reinforced PTFE Gasket?

A Metal Mesh Reinforced PTFE Gasket is a composite sealing component that combines a PTFE sealing element with a stainless steel mesh (SUS316) integrated into the gasket structure. The metal mesh provides reinforcement while the PTFE provides chemical resistance and sealing.

Two primary configurations:

Reinforced Gasket (Structural): Metal mesh embedded within the PTFE body to resist cold flow, reduce creep relaxation, and prevent blowout under high pressure

Strainer Gasket (Filter): Metal mesh covers the bore, acting as an integrated strainer to catch particulates while the PTFE seals the flange

How it works:

PTFE body: Provides universal chemical resistance (pH 0-14) and low friction sealing

Metal mesh (SUS316): Provides reinforcement, blowout resistance, and filtration

Homogeneous bonding: PTFE fused around the metal during sintering — no adhesives, no delamination

Key benefits:

Reinforced design: reduces creep and cold flow, maintains bolt torque longer

Blowout protection: metal reinforcement prevents gasket extrusion under high pressure

Integrated filtration: catches particulates without a separate strainer

Low torque sealing: suitable for glass-lined, FRP, and cast iron flanges

Wide chemical compatibility: PTFE handles pH 0-14, SUS316 mesh handles most media

FDA-compliant grades available: food and pharmaceutical applications

Versatile mesh options: available from #40 to #200 mesh (SUS316)

Limitations to be aware of:

Filter mesh requires periodic inspection: clogging can cause pressure drop or damage

Not for continuous heavy filtering: use a dedicated strainer for heavy solids loading

Comparison & Selection Guide

Metal Mesh PTFE Gasket vs Metal Jacketed vs Standard PTFE

Quick Selection Guide

Mesh Size Selection Guide

Primary Applications

Technical Specifications

Metal Mesh Reinforced PTFE Gasket Properties

Available Sizes

Quality Assurance

100% Virgin PTFE Resin — consistent quality, batch after batch

SUS316 Stainless Steel Mesh — corrosion-resistant, food-grade material

Homogeneous Bonding — PTFE fused through mesh perforations — no delamination

FDA-Compliant Grades Available — for food, beverage, and pharmaceutical applications

Full Traceability — material certificates on request

Lead Time — standard sizes in stock (24-48 hours); custom sizes 7-15 days

Case Study 

At a natural gas gathering station in Northwest China, a 15MPa high-pressure pipeline had been operating under long-term high pressure, frequent pressure fluctuations, and complex media conditions. The original spiral wound gaskets gradually suffered from corrosion and sealing degradation caused by continuous exposure to corrosive media and repeated pressure cycles, creating potential leakage risks and affecting the safe operation of the pipeline system.

To address these challenges, PTFE gaskets reinforced with 316L stainless steel mesh inserts were installed as a replacement solution. The PTFE sealing layer provides excellent chemical resistance, while the 316L stainless steel mesh reinforcement enhances mechanical strength, pressure resistance, and long-term sealing stability.

After replacement, the pipeline has operated continuously for more than 2 years under fluctuating pressure conditions, maintaining reliable sealing performance with zero leakage throughout the service period.

FAQ

Q: What is a Metal Mesh Reinforced PTFE Gasket, and when should I use it?

A: A Metal Mesh Reinforced PTFE Gasket (also known as a strainer gasket PTFE or reinforced PTFE gasket) combines PTFE's chemical resistance with stainless steel mesh reinforcement or filtration.

Use the reinforced version when you need creep resistance and blowout protection, in high-pressure, thermal cycling, or vacuum service where standard PTFE would deform.

Use the strainer version when you need to remove particulates from your fluid stream while sealing the flange, eliminates a separate strainer, reduces leak points, and lowers installation cost.

Available in mesh sizes from #40 to #200 (SUS316) and FDA-compliant grades.

Q: What mesh sizes are available, and how do I choose the right one?

A: PTFE gaskets with metal mesh are typically available in #40, #60, #100, #150, and #200 mesh (SUS316 stainless steel).

Selection guide:

#40 (coarse): large solids, slurries, mining.

#60 (medium): general industrial filtration.

#100 (fine): chemical processing, moderate filtration.

#150-#200 (very fine): pharmaceutical, high-purity, food applications.

Higher mesh provides finer filtration but higher pressure drop. For heavy solids loading, use a dedicated strainer, the gasket mesh is for light to moderate particulate removal.

Need help selecting the right mesh? Contact us with your media, temperature, pressure, and particle size.

Q: What are the limits — and the most common mistakes?

A: Temperature: -180°C to +200°C continuous service.

Pressure: Up to 6.4 MPa (64 bar), depends on thickness and design.

Chemical: PTFE pH 0-14 — SUS316 mesh handles most acids, alkalis, and solvents.

Three common mistakes:

(1) Using strainer gasket for heavy solids loading, mesh clogs, pressure builds up, and the gasket can fail. Use a dedicated strainer for heavy solids.

(2) Choosing wrong mesh size: too fine causes pressure drop; too coarse lets particles through.

(3) Ignoring periodic inspection: filters can become loose or damaged over time; inspect regularly.