Seals in PTFE and Engineered Thermoplastics

Valve Seats and Bearings

Devlon® X100 and V-API developed by James Walker in close cooperation with the valve industry as the answer to the search for superior valve seat materials.


Devlon X100

Devlon X100
The next generation of materials for valve seats specifically developed for use in the valve industry as a floating ball valve seat material.

Devlon X100 extends both the temperature and pressure range of traditional materials such as Nylon 6 and PTFE and improves moisture absorption resistance, with additional improvements in wear performance and chemical resistance to aliphatic and aromatic hydrocarbons, H2S and CO2.

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Devlon V-API

Devlon V-API
Specifically formulated to provide enhanced performance across a wide temperature and pressure range, Devlon V-API is now widely specified by valve manufacturers and has rapidly gained approval for use by major oil and gas producers.

Devlon V-API is a proprietary formula developed by James Walker, which includes additives that allow the material to perform at higher pressures and temperatures than the majority of soft valve seat materials, providing a cost effective solution with superior performance.

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PMI Technology

James Walker’s Devlon range of high performance thermoplastics has incorporated technology to protect against inferior, low-cost imitations.

In safety critical applications such as valves, it is vital that the material specified is the material used.

The performance of Devlon valve seat materials is protected by Positive Material Identification Technology.

PMI Technology is a microscopic additive incorporated within the Devlon polymer that can be identified from the smallest sample of material, including parts that may have been melted or burnt during use.

Devlon with PMI Technology gives manufacturers and end users the peace of mind that they are using genuine Devlon polymer.

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