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Concentric butterfly valve

Welco resilient seated butterfly valves are widely used in various industries for both on-off and regulating service. Compare with traditional globes & ball valves, butterfly valves are less weight and cost-effective. Followed by the rapid development on various elastomer materials, resilient seated butterfly valve are now used not only for water system but also for various chemical industries. Resilient seated butterfly valves are designed in accordance with API609 with axes of body, stem and disc concentric.