Compressed Asbestos-free C4400 Gasket

QS Gasket: Compressed Asbestos-free C4400 Gasket

Name: Compressed Asbestos-free C4400 Gasket
Standard: ASME B16.5
Material: Klingersil C4400
Max Temperature: 400℃
Size: 6 Inch
Pressure: 150LB
Complete Set: with G10 Sleeve and Washers and ZPS
Compound: with Aramid Fiber Reinforced with a Nitrile Binder

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Compressed Asbestos-free C4400 Gasket
Manufactured from high-performance Klingersil C4400 material and fully compliant with ASME B16.5. Reinforced with aramid fibres and bonded with nitrile rubber (NBR), it withstands temperatures up to 400 °C and is rated for 6-inch, 150 LB service. The complete set includes G10 sleeve, insulating washers and ZPS locating kit, delivering superior sealing and electrical insulation while remaining safe and environmentally friendly—ideal for high-temperature, high-pressure industrial duties.

How to select a gasket ？
Five core elements – think of them as “five inter-locking rings”. Mismatch any one of them and the seal can fail.

Element 1 – Fluid and temperature
This is the starting point; it dictates the material.
Fluid aggressiveness: verify that the gasket material is compatible. Strong acids, alkalis or solvents attack polymers and fibres in very different ways. The NBR binder in Compressed Asbestos-free C4400 Gasket, for example, resists petroleum-based oils, water and steam, but may not tolerate strongly oxidising acids.

Operating temperature: the material must remain physically and chemically stable. Ordinary rubber gaskets are limited to ~100 °C, whereas Compressed Asbestos-free C4400 Gasket is certified to 400 °C, making it suitable for steam circuits and hot-oil lines.

Example: a 150 °C heat-transfer-oil system cannot use a standard rubber gasket; Compressed Asbestos-free C4400 Gasket or an equivalent high-temperature non-asbestos sheet is the correct choice.

Element 2 – Pressure rating
Pressure governs the mechanical strength and blow-out resistance required.
Internal pressure tries to push the gasket out of the flange gap; high-pressure duty therefore demands a sheet with high toughness and low creep. Compressed Asbestos-free C4400 Gasket contains tightly bound aramid fibre reinforcement that withstands elevated pressures.

Flange-class matching: the gasket’s pressure–temperature rating must match the flange standard. A 150 LB ASME B16.5 flange pair with a 6-inch Compressed Asbestos-free C4400 Gasket is an exact class-for-class fit.

Element 3 – Flange conditions
Often overlooked, yet critical.
Flange standard and facing: raised-face (RF), flat-face (FF) or ring-type joint (RTJ)? ASME B16.5 RF flanges, for instance, are normally sealed with spiral-wound or compressed non-asbestos gaskets.

Surface finish: rougher faces need softer, more conformable sheets; smoother faces allow denser materials.
Bolt load: calculate the available load to achieve the required seating stress. Compressed Asbestos-free C4400 Gasket needs a relatively high seating stress—ensure the bolts can supply it.

Element 4 – Gasket performance and configuration
With the first three factors fixed, choose the specific type and performance level.
Material family: from traditional asbestos-rubber (now obsolete) to modern non-asbestos fibre, spiral-wound, metal or PTFE types. Compressed Asbestos-free C4400 Gasket is a high-performance compressed non-asbestos sheet—the premium, environmentally acceptable replacement for asbestos.

Key properties
- Recovery: ability to re-seal after temperature or pressure cycling.
- Creep resistance: limits permanent deformation under sustained bolt load.
- Seating stress: minimum stress needed for initial seal.

Configuration: do you need only the sheet gasket or a complete assembly? To prevent rotation or crushing, a bolted set can include “G10 sleeve and washers and ZPS” insulating hardware that simultaneously centres the gasket and provides electrical isolation, stopping galvanic attack.

Element 5 – Compliance and special requirements
Industry codes: API, DIN, ISO, etc. Your application may mandate ASME B16.5 compliance.
Environmental & safety: asbestos-free, low-chloride and similar clauses are commonplace. Compressed Asbestos-free C4400 Gasket meets all environmental statutes and contains no hazardous asbestos, making it suitable for health- and eco-sensitive sites.

Special functions: if electrical isolation is required, specify the full insulating kit supplied with Compressed Asbestos-free C4400 Gasket.

Selection routine
1. List the duty: fluid, temperature, pressure, flange type.
2. Short-list material families that survive the fluid and temperature.
3. Match pressure class and flange standard to a specific gasket style (e.g. 150 LB Compressed Asbestos-free C4400 Gasket).
4. Add ancillary needs: insulation, corrosion protection, alignment hardware, etc.
5. Consult the supplier: send the list to a specialist for final technical confirmation and part-number selection.

Remember: there is no “best” gasket—only the most suitable one. This guide is intended to give you a clear route to that choice.

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