Greene, Tweed has been providing high-performance sealing solutions for valves in the oil, gas, petrochemical and power industries for over 25 years. Designed to withstand a range of extreme conditions, Greene, Tweed’s valve seals extend service life, enhance equipment reliability, and reduce total cost of ownership. In addition, engineering support worldwide ensures the optimal solution is found for each application.
Greene, Tweed’s range of high-performing materials optimal for use in valve seals includes:
Chemraz® perfluoroelastomers (FFKM) provide broad-spectrum chemical resistance, withstanding acids, ethers, aromatics and other aggressive media that typically far exceeds FKM solutions. A long service life extends MTBF (Mean Time Between Failure), and exceptional compression set affords a wide operating band. In addition, service temperature ranges from -40°F to 600°F (-40°C to 315°C).
Xyfluor® elastomers are highly fluorinated and combine excellent chemical compatibility with low-temperature capability. Performing in temperatures as low as -76°F (-60°C), Xyfluor resists aggressive media such as sour gasses and steam. In particular, it withstands H2S and CO2 better than comparable FKM and FQMV elastomers.
MSE® lip seals consist of a PTFE sealing device energized by a corrosion-resistant metal spring. When under compression in the gland, the spring applies force to the gland surface to create a tight barrier. Often used in applications with pressure exceeding 80 bar, the MSE seal maintains integrity in high or low pressures, and in non-ideal situations such as gland misalignment.
Arlon® and Avalon® engineering thermoplastics feature a low coefficient of friction, thermal stability and high impact and chemical resistance. As valve seats, they minimize wear to ensure optimal valve performance and extended life. Virgin and filled grades afford a high degree of design flexibility, making Arlon (PEEK material based) and Avalon (PTFE material based) suitable for a wide range of applications.