Products & Services
Gaskets and Sheet Jointings
James Walker manufactures and supplies complete ranges of metallic and semi-metallic joints, gaskets and sheet jointings to suit every industrial application.
In addition, we produce precision-cut flat gaskets to any shape, size and quantity from any sheet material, including our own extensive ranges of jointings.
A vast stock of flange gaskets is held ready for immediate despatch, and we can economically cut non-standard profiles of any complexity within minutes.
Our work at the frontier of sealing technology gives us a clear understanding of the roles that gaskets must play, for example…
- If joint faces are absolutely flat and aligned true
- If flanges do not distort under load
- If loaded bolts do not stretch or relax there is no need for a gasket, because the joint will be perfect
In the real world, such perfection is very expensive to achieve and almost impossible to maintain. Therefore a gasket is the most practical and cost effective way to seal a bolted flange joint.
The problem for designers and maintenance engineers is to select the correct gaskets to ensure the integrity and safe operation of their fluid handling plant.
Compressed fibre jointings
A range of highly proven non-asbestos sheet jointings that covers flange gasket duties with most fluid media from ASME Class 150 to Class 600 ratings, plus some special applications.More Info
Nebar® cork-elastomer jointings are the obvious choice for numerous flange sealing duties with transformer oils, lubricating oils, fuels and water in the electrical, automotive, marine, aerospace and general machinery sectors.More Info
We in-house process and/or supply wide ranges of commercial and specification grade elastomers for flange sealing and other duties.
Expanded graphite jointings
Supagraf® expanded graphite jointings combine excellent chemical resistance with an exceptionally wide temperature range to provide outstanding sealing over extended periods.
• Temperatures from cryogenic to above +400°C in oxiding environments.
• Maximum temperature of +2500°C in inert conditions under certain circumstances.
• Excellent resistance to stress relaxation at elevated temperatures.
Gasket and profile cutting
Our CAD/CAM controlled water-jet, abrasive water-jet, and laser cutters produce precision cut gaskets and other complex profiles to any shape, size and quantity from virtually any sheet material.More Info
Our Metakamm® gaskets are now widely specified for high temperature/pressure pipework and vessels where spiral wound gaskets were previously used.More Info
We produce precision-machined solid metal gaskets to provide top performance under extreme conditions; and metallic corrugated types, often with expanded graphite on the sealing surfaces, for high temperature applications.More Info
Other gasket products
We offer a variety of gasket types or materials for specific applications - plus our compact hand tool for cutting circular flange gaskets from compressed fibre jointings, rubber and cork-elastomer sheets. Also, our RotaBolt® tension control fasteners are widely used on high integrity flange jointed systems.More Info
PTFE gaskets and jointings
James Walker's expanded-PTFE gasket products provide outstanding chemical resistance for duties where hygiene and non-contamination are essential.
They offer many unique features...
- Outstanding chemical resistance
- Non-corrosive, non-wetting, non-contaminating and odourless
- Can work efficiently at temperatures from cryogenic up to +260°C
- Excellent electrical and thermal insulation in virgin PTFE form
Ring joint gaskets
API-licensed and ASME ranges of solid metal ring joints, precision manufactured in the UK by James Walker Moorflex for high pressure oilfield applications and process industry duties.
Available to API 6A (oilfield use) and ASME B16.20 (general use) standards to fit ASME, BS and DIN flanges.More Info
These exceptionally versatile gaskets solve many flange sealing problems for industry.
They have either a metal core with sealing materials on both flat surfaces, or a pliable core encased in a thin metallic casing.
Spiral wound gaskets
James Walker Metaflex® gaskets will seal flanges where temperature, pressure, vibration and flow rates are beyond the capability of conventional jointing materials.
They are used worldwide for pipelines and pressure vessels on steam, petrochemical, nuclear, marine and hydraulic plant, as well as on heat exchangers.