Butterfly valves, otherwise known as quarter-turn valves, isolate and control the flow of a liquid. Most often used in water or waste treatment, especially in the field of agriculture, butterfly valves also have the distinction of being one of the most common valve types on the market. Butterfly valves serve reliably even when heavy duty is required. These valves need very little maintenance and are extremely durable.
There are many good ideas and practices concerning valves of all types.
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Flanged Ball Valves
ANSI 150 through 600 from ½” through 12” – Global Valve and Controls high performance flanged ball valve design is the product of an extensive R&D program that offers standard live loaded stem design for zero design fugitive emissions, investment cast up to eight inch, standard locking handle and TFM seats.