Turcon® Variseal®
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TO H ER WER E SFHOARPES EAASUSTA N AHBNL O E LO F UGY TURE YO G UE R TPA RTN L I N G TIEC

Together We Shape a Sustainable Future Trelleborg Sealing Solutions is one of the world’s leading developers, manufacturers and suppliers of precision seals, bearings and custom-molded polymer components. We collaborate closely with customers to develop unique, innovative solutions to tomorrow’s challenges. Utilizing our dedicated product design, material development and testing capabilities, we are a one-stop-shop providing the best in elastomer, silicone, thermoplastic, PTFE and composite technologies for applications in aerospace, automotive, general industrial and healthcare & medical...

04 Choosing the Right Seal for your Application 08 Turcon® Seal Materials 43 Turcon® Variseal® HF 09 Zurcon® Seal Materials 56 Turcon® Roto Variseal® 10 Spring Types and Materials 12 Hardware Design Considerations 66 General Quality Criteria 13 Basic Gland Types 69 Company Profile 14 Preventing Seal Damage 82 Engineering Tools & Apps 15 Groove Design - Metric 17 Groove Design - Inch Latest information available at www.trelleborg.com/seals • Edition July 2024 TRELLEBORG SEALING SOLUTIONS • 3

TURCON® VARISEAL® ■ Choosing the Right Seal for your Appplication Turcon® Variseal® offers major benefits in the design of components such as cylinders. These include: - Excellent leakage control - High resistance to wear - High resistance to extrusion into gaps - Withstanding aggressive and abrasive process media - Very good temperature capabilities - Compact form Turcon® Variseal® is available in a range of geometries and designs that allow the optimum profile to be selected for each application. They can be produced from a wide range of Turcon® materials, our proprietary PTFE-based...

■ General Turcon® Variseal® are single acting, spring-energized seals used for both dynamic and static applications. Variseal® are effective in a wide range of applications. They are chosen when higher resistance to chemical media is required, if the seal is required to operate in extremes of temperature and/or where good extrusion and compression characteristics are needed. Turcon® Variseal® designs have three main characteristics: - Application specific U-shaped seal profile - Spring geometry suited to the particular application - Proven high-performance Turcon® or Zurcon® polymers...

Table 1: Turcon® Variseal® Selection Table !) Maximum operating temperature +80 °C (+176 °F). In a pressure-free state, sterilization is possible for a short period at higher temperature. 6 • TRELLEBORG SEALING SOLUTIONS Latest information available at www.trelleborg.com/seals • Edition July 2024

Table 3: Turcon® and Zurcon® Material Selection Guide Material Code Material Description Temperature Range °C (°F) Chemical Compatibility T01 / Premium grade virgin PTFE for static, slow dynamic or light duty -253 to +260 MF11 applications. MF1 for food contact service. Color: white (-423 to +500) Premium grade modified PTFE. Light duty material with greater wear resistance than Turcon T01. Reciprocating and slow rotary applications. Color: turquoise Proprietary polymer-reinforced compound for long wear life in challenging combinations of pressure and temperature. Color: black Use where...

TURCON® VARISEAL® · Turcon® Seal Materials Turcon® Seal Materials Turcon® materials are high performance thermoplastics specifically developed for sealing applications. They are based on premium-grade PTFE fluoropolymer resins, with the properties of each compound achieved by the addition of fillers and special processing techniques. Turcon® materials offer the following benefits: Low Coefficient of Friction Friction is dependent on pressure, contact surface area, speed and lubrication. Turcon® materials have very good friction characteristics. For example, a coefficient of friction on...

Zurcon® Seal Materials Zurcon® Seal Materials ZURCON® Z80 AND Z81 Zurcon® Z80 and Z81 are virgin Ultra High Molecular Weight Polyethylene, or UHMWPE. Because the water absorption of Zurcon® Z80 and Z81 is zero, it is ideal for water service. Its abrasion resistance is five to ten times higher than PTFE, making it the material of choice in abrasive environments. As Z81 is physiologically safe, it is also suitable for use in food and pharmaceutical processing. The main characteristics of Zurcon® Z80 and Z81 are: Low Friction The dry friction coefficient of Zurcon® Z80 and Z81 is lower than...

TURCON® VARISEAL® · Spring Types and Materials Spring Types and Materials A metal spring is incorporated into Turcon® Variseal® to provide elasticity to the seal. This makes the seal permanently elastic, despite changes in operating temperature, pressure or chemicals processed. Each of the three spring types used in Variseal® has unique properties that give them their performance characteristics. The two most important properties of the spring, besides the corrosion resistance of the metal, are load value and deflection range. The spring load affects sealing ability, friction and the wear...

Spring MaterialsThe standard spring material for Turcon® Variseal® is stainless steel (spring code S). Two further materials are available for specific applications, as detailed in the table below. Table 4: Spring Materials Selection Guide Hastelloy® is a registered trademark of Haynes International, Inc. Elgiloy® is a registered trademark of the Elgiloy® Specialty Metals Alternative brand may be used. TRELLEBORG SEALING SOLUTIONS • 11 Latest information available at www.trelleborg.com/seals • Edition July 2024

TURCON® VARISEAL® · Hardware Design Considerations Hardware Design Considerations The best way to obtain optimum Variseal® performance is to plan ahead during the design phase of your product. The initial phase should bring into alignment the three factors having the greatest impact on seal performance - the hardware design, the service conditions, and the seal design. Design issues such as gland style, mating surface hardness and surface finish, and dynamic alignment should be reviewed and adjusted to work with the intended service conditions and to suit the selected seal design. The...