| 11. | These industries cover products such as industrial valves, butterfly valves, valve actuators, relief valves, cocks.
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| 12. | There are different kinds of butterfly valves, each adapted for different pressures and different usage.
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| 13. | A lug-style butterfly valve used in dead end service generally has a reduced pressure rating.
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| 14. | The zero-offset butterfly valve, which uses the flexibility of rubber, has the lowest pressure rating.
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| 15. | A "'butterfly valve "'is a valve which can be used for isolating or regulating disk.
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| 16. | Today, the waste water portfolio especially includes butterfly valves as well as venting and bleeder valves.
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| 17. | The American Water Works Association issued a specification for the butterfly valve, AWWA C-504, in 1954.
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| 18. | Another innovation for the Henry Pratt Company was the design of the first rubber-seated butterfly valve.
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| 19. | Each throttle shaft has a butterfly valve that controls how much air gets into the engine.
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| 20. | If the pipeline contains butterfly valves, or reduced port ball valves, the pipeline cannot be pigged.
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