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Elastomeric/Thermoplastic Vee Rings

Elastomeric/Thermoplastic Vee Rings

Product catalog summary
Elastomeric/Thermoplastic Vee Rings Sealing Solutions

Overview:
The document discusses a multi-lip, pressure-activated seal made from elastomeric and/or thermoplastic components. The design ensures that pressure differentials across each lip maintain sealing integrity, reducing the risk of failure.

Seal Configuration:
  • Gland Design: Open gland configurations are preferred to control Free and Confined Stack Heights (FSH and CSH) for optimal seal performance.
  • Adapters: Made from proprietary thermoplastics, these adapters do not corrode and can function as bearings or debris barriers.

Elastomer Selection:
Various elastomers are available, including HNBR 209, NBR 979, FKM 929, CR 980, Fluoraz® 790, 799, and Chemraz® 510, 526. Each has specific design constraints and recommendations.

Thermoplastic Selection:
Proprietary grades of PEEKTM and PTFE are used, including Arlon® and Avalon® grades. These materials offer different properties such as glass reinforcement, carbon-fiber reinforcement, and lubrication.

Contact Information:
For further details, Greene, Tweed Oilfield in Houston, TX can be contacted via phone or fax.
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Catalog excerpts

Elastomeric/Thermoplastic Vee Rings-1

ELASTOM ERIC/THERMOPLASTIC 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 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. 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. Greene, Tweed 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 of our standard warranty that shall be applicable to such products.

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