AFT manufacture a wide variety of high pressure high temperature high performance valve stem seal assemblies and gland packings. None of these are standard although many follow a standard theme. Featured here is an example of a high pressure gate valve stem seal assembly, tested at 15000 PSI and -29°C to +180°C.

Our team can design and manufacture custom seals on a range of materials to suit your application. Tell us about your requirements and one of our specialists will be in touch.

These products are extremely versatile and somewhat modular. The V-ring can be made in PEEK, filled PTFE or even an elastomer for certain applications. They can be designed with more than one V-ring in each stack and they don’t have to be the same material to improve lower and higher temperature performance.

Whilst we work around typical designs and groove dimensions for much of what we do, it is not a full picture of all we do. Many of the seals we design and supply are specials – the difficult applications, the extremes, often specific to particular products and service conditions and very often oil and gas related.

Learn more about our CNC milling capabilities and how we can help bring your ideas to life. Our expert team is ready to take on your next project. We offer comprehensive plastic CNC milling services from the micro in size to much larger 1 meter long components.

CNC turning of PTFE and engineering plastics. Live tooling on our lathes mean competitive pricing and shorter lead times.

All of our spring energised rod and piston seals are available as face seals however certain extreme applications require extreme seals.

AFT design and manufacture HPHT gate valve seat seals for valve manufacturers worldwide. Typically these comprise an AF801 Victrex™ PEEK jacket energised with an Elgiloy® spring with a PTFE insert to prevent permanent deformation of the seal and spring should something go wrong.

This means that even after an episode of rapid decompression, the seals will perform as normal. These high performance face seals are not limited to gate valves. They can be used in any extreme applications where a high performance semi static seal is required.

We pride ourselves on our expert knowledge of the compressor parts industry, providing a wide range of compounds suitable for your application.

The Michigan Legislature Website is a free service of the Legislative Service Bureau in cooperation with the Michigan Legislative Council, the Michigan House of Representatives, the Michigan Senate, and the Library of Michigan. This site is intended to provide accurate and timely legislative information to the citizens of the State of Michigan and other interested parties. Additional historical documents can be found at https://www.michigan.gov/libraryofmichigan. The information obtained from this site is not intended to replace official versions of that information and is subject to revision. The Legislature presents this information, without warranties, express or implied, regarding the accuracy of the information, timeliness, or completeness. If you believe the information is inaccurate, out-of-date, or incomplete or if you have problems accessing or reading the information, please send your concerns to the appropriate agency using the online Comment Form in the bar above this text.

With outstanding mechanical, thermal and chemical resistance properties, PEEK is an ideal material to use for sealing applications.

From back up rings and mining seals to piston seals and o rings, we offer a wide range of sealing products machined from polytetrafluoroethylene (PTFE).

When you’ve tried standard profile seals without success or know you’re going to need a bespoke solution for a particular project, we can deliver what you need.

Our inspection and measuring equipment includes a state-of-the-art CNC Coordinate measuring machine, and optical measuring machines.

AFT Fluorotec Head OfficeUnit F City Park, Swiftfields, Welwyn Garden City, UKAL7 1LYAFT Fluorotec Coatings Manufacturing Site Unit 4, Swallowfields, Welwyn Garden City, UKAL7 1JDTel: 01992 515880Photography by Katie Blair Matthews

If you have a specific design in mind, or would like to send us your valve seal requirements so we can advise on the best solution, get in touch with our Technical Team through the form below.

AFT Fluorotec have an extensive range of PTFE materials and we can also produce seals in other materials such as VICTREX® PEEK, PU, FPM and NBR.

Browse some of our typical PTFE slide bearing and skidway plate configurations and get in touch to discuss your requirements.

We provide a bespoke fluoropolymer component design & manufacture service and can deliver the right solution to your problem.