Elastomeric/Thermoplastic Vee Rings - GREENE TWEED - #1

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© 2008, Greene, Tweed all rights reserved All trademarks are property of their respective owners. 06/08-GT DS-US-OF-009 v e e - r i n g \ p r o d u c t d a t a Contact Us Greene, Tweed Oilfield Houston, TX, USA Tel: +1.281.765.4500 Tel: +1.800.927.3301 Fax: +1.281.765.4553 Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor a modification or alteration www. g t w e e d . c o m of our standard warranty that shall be applicable to such products. ELASTOMERIC/THERMOPLASTIC VEE RINGS SEALING SOLUTIONS A multi-lip (redundant), pressure-activated seal is constructed of elastomeric and/or thermoplastic components. Pressure differential develops across each lip and a column mechanical load expands across the entire packing set and is constant at any point in the set. Vector forces acting on the lips of the Vee induce a radial load that is a function of the Vee ring design. The redundancy concept of the multiple lips maintains sealing integrity over all application parameters, minimizing the chances of catastrophic failure. SEAL CONFIGURATION Gland Design Greene, Tweed designers prefer open gland configurations to accurately control the FSH and CSH (Free and Confined Stack Heights) to give optimum seal performance. Adapters End and central adapters are manufactured from Greene, Tweed proprietary thermoplastics. Thermoplastics do not gall or corrode and can be designed as a bearing or debris barrier. Note: Please refer to Greene, Tweed & Co. Houston Engineering for part number. ELASTOMER SELECTION HNBR 209 NBR 979 FKM 929 fiber reinforced 926 rapid gas decompression resistant CR 980 Fluoraz® 790, 799 Chemraz® 510, 526 * Please refer to GT for design constraints and recommendations THERMOPLASTIC SELECTION Arlon® Proprietary grades of PEEKTM Arlon 1000 Virgin, injection molded Arlon 1160 Glass-reinforced grade Arlon 1260 Carbon-fiber-reinforced grade Arlon 1330 Lubricated grade Arlon 1555 Carbon fiber/Lubricated grade Avalon® Proprietary reinforced grades of PTFE Polyphenylene Sulphide (PPS) * Please refer to GT for design constraints and recommendations