In-house testing brings greater certainty to high-pressure seal qualification

For valve manufacturers and operators, qualifying elastomer seals for high-pressure service can be a costly, time-critical process. A failed test may delay certification, extend development schedules and trigger expensive redesign work. James Walker addresses these risks through in-house testing that integrates seal design, materials expertise and controlled validation.

Its facilities support qualification programmes such as API 6A Annex F1.11, while also enabling internal development testing for demanding operating conditions. By specifying equipment and developing test methodologies in-house, James Walker can exercise close control over critical parameters including pressure, temperature, clearance gaps, extrusion behaviour and rapid gas decompression (RGD).

In addition to extensive in-house test capabilities, James Walker has also partnered with third-party test facilities to offer turnkey approvals for individual products or complete valve sealing packages across compression packing, spring-energised engineered plastic seals and elastomeric O-rings.

Advanced monitoring and data capture provide detailed evidence of how a seal performs throughout a test cycle—not simply whether it passes or fails. Engineers can use these findings to identify likely failure modes, refine geometries, assess material choices and feed learning directly back into product development.

Keeping design and testing expertise closely connected also supports faster, better-informed decisions. Seal engineers, materials specialists and test technicians can collaborate with customers from the outset, building a clear design brief and a test strategy around the actual application. This helps reduce uncertainty before formal qualification begins and allows potential issues to be addressed earlier, when changes are less disruptive and less costly.

Decades of test experience, combined with advanced materials and manufacturing technology, have enabled James Walker to validate sealing products across extremes of pressure and temperature, and a wide variety of different media. The result is more than a test report: it is a stronger technical basis for selecting, developing and approving seals for harsh, safety-critical environments.

For further detail, read James Walker’s technical paper: How to deliver successful high-pressure seal testing programmes.

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