Flexitallic SF 3500

SF 3500 is an aramid and glass fibre sheet bound with NBR. The manufacturer's data highlights its exceptional resistance to mechanical stress and bolt-load torque.

Request a Quote

Open Comparison Tool

Manufacturer Documentation

Our Quebec facility manufactures custom-cut flat gaskets to your exact specifications. VAMECA can also evaluate the supply of this part number or engineer a suitable replacement.

AT A GLANCE

Aramid and Blends

Product Family

Compressed Fibre

Material Composition

Aramid and glass fibres with NBR nitrile binder

TECHNICAL SPECIFICATIONS

Material Specifications

Maximum temperature and pressure limits cannot be applied simultaneously.

TEMPERATURE

Rated up to 440°C catalog maximum, subject to P/T limits

PRESSURE

Catalogue maximum 207 bar; not automatically cumulative with maximum thermal limits

THICKNESSES

1/64 to 1/8 in., standard catalogue range

Applications and Key Features

Documented applications include pumps—specifically split-case designs—and critical assemblies requiring superior bolt-load retention and flange-load bearing capability.

Published Testing and Approvals

Standards, Testing, and Certification References

Manufacturer test reports available. Certifications and lot validity to be verified.

PART NUMBER ANALYSIS

To properly select or replace this material

Composition and Mechanical Properties

SF 3500 is an aramid and glass fibre sheet bound with NBR. The manufacturer's data sheet highlights its high resistance to mechanical stresses and bolt load. Flexitallic publishes independent maximums of up to 440°C and 207 bar, along with 10% compressibility, 62% recovery, and a density of 1.6 g/cm³. These catalogue specifications do not guarantee performance across all gasket thicknesses.

Sheet Applications

Documented applications primarily include pumps—especially split-case designs—and flanged assemblies requiring excellent bolt load retention. Gasket thickness and bolt torque must be evaluated under actual operating conditions.

Material Selection and Replacement

For pump applications, clearly define the joint face, flange rigidity, shutdown frequency, thermal cycling, and process media. Never use maximum pressure as the sole substitution criterion. Published maximum pressures and temperatures are not inherently cumulative, particularly during severe thermal cycling.

Comparable materials to evaluate: Durlon 8500 and KLINGER KLINGERSIL C-4400. These comparisons do not constitute validation for direct substitution.

Composition and Mechanical Properties

Sheet Applications

Material Selection and Replacement

Comparable materials to evaluate: Durlon 8500 and KLINGER KLINGERSIL C-4400. These comparisons do not constitute validation for direct substitution.

REPLACEMENT TO BE EVALUATED

Compare designs and alternatives

KEY COMPARISON CRITERIA

For pumps, specify the joint face configuration, seating surface rigidity, shutdown frequency, thermal cycling, and process fluid. Do not rely solely on maximum design pressure as the criterion for substitution.

Need this gasket, custom cutting, or a replacement?

Part Number: Flexitallic SF 3500

Please provide the part number, thickness, dimensions, quantity, and process fluid. We will review material availability for the specified grade, custom cutting at our Quebec facility, or an engineered alternative tailored to your assembly.

Request a Quote

Evaluate a replacement

View official documentation

The manufacturer's latest datasheets, certifications, and P/T curves must be reviewed prior to ordering or substitution.

View manufacturer documentation ↗

RELATED PART NUMBERS

Compare Related Designs

For pumps, please specify the gasket joint surface, seating surface rigidity, shutdown frequency, thermal cycling, and media. Do not rely solely on maximum operating pressure as the criteria for substitution. Related reference materials: Durlon 8500 (Aramid/Inorganic/NBR), KLINGERSIL C-4400 (Aramid/NBR), and TEADIT NA1081 (Aramid/NBR).

REFERENCE SHEET

KLINGER