KLINGER KLINGERSIL C-4400

KLINGERSIL C-4400 by KLINGER is a compressed gasket material engineered with aramid fibres and an NBR nitrile binder. This versatile grade is designed for industrial flat gasket applications; however, its operating limits depend strictly on the pressure/temperature curve and specific bolted joint assembly. It should not be confused with wire-reinforced grades such as C-4408.

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AT A GLANCE

Aramid/NBR

Product Family

Compressed Fibre

Material Composition

Aramid/NBR

TECHNICAL SPECIFICATIONS

Material Specifications

Maximum temperature and pressure limits cannot be applied simultaneously.

TEMPERATURE

-200 to +400 °C

PRESSURE

75 bar

THICKNESSES

0.5 / 1 / 1.5 / 2 / 3 mm

Applications and Key Features

Flanges and industrial equipment for water, oil, or other process fluids, verified through engineering document review for material compatibility and proper bolt torque specifications.

Published Testing and Approvals

Standards, Testing, and Certification References

Standards / Testing: ASTM F36 J (2 mm), DIN 52913

PART NUMBER ANALYSIS

To properly select or replace this material

The C-4400 Profile

KLINGERSIL C-4400 is based on a formulation of aramid fibres bonded with nitrile rubber. It is not a universal gasket suitable for all temperatures. KLINGER’s published limits must be interpreted using pressure/temperature diagrams, the thickness used, and the flange configuration. The reference material must be accurately identified: C-4400 is not C-4408 or C-4430.

Which Materials Should Be Compared?

The related reference materials feature three documented constructions: KLINGERSIL C-4408 with steel wire mesh, C-4409 with expanded metal reinforcement, and Flexitallic SF 3500 with aramid and glass fibres. Mechanical properties, approvals, and operating curves must be evaluated against the assembly's actual service conditions.

The Replacement Method

Combined pressure/temperature conditions, media type and concentration, cycling/shutdowns and startups, and gasket thickness must all be documented. Torque recommendations and any applicable regulatory approvals are among the factors to cross-reference. A current technical datasheet and the manufacturer's P/T diagram take precedence over generic crossover charts.

To compare constructions: KLINGER KLINGERSIL C-4408 and KLINGER KLINGERSIL C-4409. These grades share a common aramid/NBR family, but formulation, approvals, and pressure-temperature curves remain specific to each.

The C-4400 Profile

Which Materials Should Be Compared?

The Replacement Method

REPLACEMENT TO BE EVALUATED

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KEY COMPARISON CRITERIA

KLINGERSIL C-4408 and C-4409 utilize different metallic reinforcements: a wire mesh core for C-4408 and expanded metal for C-4409. Flexitallic SF 3500 combines aramid and glass fibres with an NBR binder, with no metallic reinforcement specified. These constructions are evaluated and compared based on their mechanical properties, test standards, and pressure-temperature curves.

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Part Number: KLINGER KLINGERSIL C-4400

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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