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One of the most compact and light-weight valves
available. Used for a wide range of applications, the choice of
seat, lining and disc options has increased significantly over
recent years making the valve a popular choice. A wide range of
materials, sizes and pressure ratings gives reliable positive
isolation and moderate flow control capability over a wide range of
applications throughout the industry. The metal seated valve is
well established in petrochemical and oil industries being
lightweight, firesafe and suitable for actuation. Butterfly valves
offer a number of advantages when used for the proper application.
They may be used in a wide variety of chemical services, they are
available with small dimensions allowing for use in areas where
space is limited, and they allow a high coefficient of flow.
Butterfly valves are quick opening valves that
consist of a metal circular disc or vane with its pivot axes at
right angles to the direction of flow in the pipe, which when
rotated on a shaft, seals against seats in the valve body. They are
normally used as throttling valves to control flow. Unlike ball
valves, butterfly valves do not have any pockets in which fluids
may become trapped when the valve is closed.