INDUSTRIAL GASKETS & SEALING SOLUTIONS

Durlon

Durlon 8400

Durlon 8400 is a compressed sheet material made with phenolic and mineral fibres bonded with NBR, engineered for steam and chemical process industrial services.

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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

Carbon & Blends

Product Family

Compressed Fibre

Material Composition

Phenolic / NBR

TECHNICAL SPECIFICATIONS

Material Specifications

Maximum temperature and pressure limits cannot be applied simultaneously.

TEMPERATURE

Min. -40°C · Continuous 290°C · Catalog Max. 427°C

PRESSURE

103 bar (catalogue maximum, verify according to P/T rating)

THICKNESSES

0.5 / 0.8 / 1 / 1.5 / 2 / 2.5 / 3 mm

Applications and Key Features

Durlon specifies applications across chemical processing equipment, pulp and paper mills, steam service, and moderately acidic or alkaline solutions, particularly for Class 150 and 300 flanges, as outlined in its technical documentation.

Published Testing and Approvals

Standards, Testing, and Certification References

Standards / Testing: ASTM F104, F36, F38 per datasheet

PART NUMBER ANALYSIS

To properly select or replace this material

Key Features of This Construction

Phenolic fibres are highlighted by Durlon for their thermal performance and ease of handling and cutting. Published pH data must be evaluated alongside the specific test conditions.

Key Criteria for Selecting a Replacement

When requesting a replacement, thoroughly document the chemicals, their concentrations, the operating temperature, and the flange type. Do not generalize a catalogue pH range across all acids or bases.

To compare constructions: Durlon 8300 and Durlon 7900. Fibres, binders, and potential reinforcements differ. Always compare the exact construction prior to any substitution.

Key Features of This Construction

Phenolic fibres are highlighted by Durlon for their thermal performance and ease of handling and cutting. Published pH data must be evaluated alongside the specific test conditions.

Key Criteria for Selecting a Replacement

To compare constructions: Durlon 8300 and Durlon 7900. Fibres, binders, and potential reinforcements differ. Always compare the exact construction prior to any substitution.

REPLACEMENT TO BE EVALUATED

Compare designs and alternatives

KEY COMPARISON CRITERIA

This phenolic formulation differs from Durlon 8300 carbon-fibre sheets and 7900 aramid/NBR sheets. Selecting the proper grade extends beyond its pH range alone.

Need this gasket, custom cutting, or a replacement?

Part Number: Durlon 8400

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.

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View official documentation

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

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RELATED PART NUMBERS

Compare Related Designs

The phenolic/NBR formulation is compared to carbon, aramid, and inorganic fibre constructions. These are distinct materials. Cross-reference constructions: Durlon 8300 (Carbon / NBR), Durlon 7900 (Aramid + mineral / NBR), and Garlock High-Temp 5500 (Inorganic fibres with an NBR nitrile binder).

REFERENCE SHEET

Durlon

Durlon 8300

Carbon / NBR

View Specifications →

REFERENCE SHEET

Garlock

Garlock High-Temp 5500

Inorganic fibres, NBR nitrile binder

View Specifications →

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