Shortly after the discovery and use of PTFE as a seal material, the need for a secondary energizing method became apparent. Unlike rubber or urethane which possess elastic and spring-like properties, PTFE will not return to its original state once deformed.
This is obviously not a desirable trait for sealing material, especially in dynamic sealing applications. PTFE seal designs were soon developed to incorporate energizing elements such as O-Rings and metallic springs. These energizers ensure the PTFE seal is always in contact with the sealing surface.
Our partners at Eclipse utilize three different spring types to internally energize PTFE and other polymer seals, each with its own advantages and drawbacks. Below we’ll discuss in detail some of the pros and cons of Cantilever V-Springs and
GFS is excited to bring you the newest video webinar series, this time covering Rotary Seals. In this first video, we will cover the basics of PTFE rotary seals. We'll talk about what they are, how they work, common applications, the components of a rotary seal, and various recommendations (lubrication, shaft, and housing).
Thermoseal's KLINGERSIL C-4401 gasket material is a compressed fiber material with excellent chemical and sealability characteristics while being reasonably priced. C-4401 is manufactured from synthetic fibers with a Nitrile binder system and is an exceptional gasket material for sealing liquids in high temperature applications. C-4401 is manufactured from synthetic fibers with a Nitrile binder system and is an exceptional gasket material for sealing liquids in high temperature applications . This material is typically used as a gasket or seal for compressors, pipe flanges, manways, pumps and valves.
DuPont™ Kalrez® 8575 perfluoroelastomer parts are a white product for “select” etching, ashing/stripping and deposition process applications. It offers low weight loss in Oxygen and Fluorine-Based Plasmas, low outgassing and excellent elastic recovery properties. Kalrez® 8575 has excellent vacuum and long-term sealing performance, good mechanical properties and is well-suited for both static and dynamic sealing applications (e.g., gas inlets, chamber lid seals, slit valve door seals, etc.). A maximum continuous service temperature of 300°C (572°F) is suggested. Ultrapure Post-Cleaning and Packaging is standard for all parts made from Kalrez® 8575.
PERFORMANCE
PTFE (Polytetrafluoroethylene) is a synthetic fluoropolymer of tetrafluoroethylene. It is a solid form of fluorocarbon and a compound with elevated molecular weight. It consists entirely of fluorine and carbon atoms. It is hydrophobic, which means that it cannot be made wet by substances containing water or by water itself. This is possible due to fluorine’s high electro-negativity and low levels of friction coefficients against all types of solids.
Freudenberg Sealing Technologies is adding further engineering plastics to its portfolio of materials for worldwide use in the food and beverage industry. Among others, these include the two high-performance PTFE materials Y002 and Y005, which now have all global food-specific approvals and can safely withstand drastic temperature fluctuations as well as aggressive media.
When it comes to processes in the food and beverage industry, there are no uniform legal requirements on a global level regarding which ingredients may be present in materials that come in contact with the products.
This is a notification of a planned reformulation of several of the Precision Associates, Inc. (PAI) FDA Fluorocarbon compounds. This notification is intended to meet the change notification requirements included in any quality or supply agreements in place with your company.
Precision Associates is a supply of Gallagher Fluid Seals.
Precision Associates was recently informed by one of their suppliers that it was discontinuing the supply of a polymer used in several of its FKM compounds as of June of 2022. Upon notification, Precision began procuring as much of the material as possible and began identifying suitable alternatives. Their evaluation is complete, and they were able to identify a suitable replacement and reformulated their compounds.
The various compounds we are reformulating are certified to a variety of material standards, most notably (FDA) 21 CFR 177.2600, and 3A sanitary standards.
Product designers need to consider the materials used for their product or their component parts. This can make a major difference when it comes to your final product. Two of the common manufacturing processes are cast and injection molding. So, what’s the difference? Below you will find helpful information to guide you as you consider which type of molding is right for your product or component part.
Both cast and injection molding have differences that play an important role in the manufacturing process. Both need to be considered when making design decisions for your product or component part. The cast molding process uses the force of gravity to inject the material into your mold. However, the injection molding process is different as it uses high pressure while your material is in a liquid
Gallagher Fluid Seals’ customer is a manufacturer of processing equipment that serves industries, including: food and beverage, automotive, pharmaceutical, and chemical. Their product lines include: fluid bed systems, coating and drying equipment, and mixer granulators.
Gallagher re-engineered the existing PTFE seal, made improvements to the lip geometry, and provided material selection guidance based on application parameters. The material change to UHMW-PE reduced seal wear, equipment downtime, and preventative maintenance.