Ball valves use a metal ball with a hole bored through the center, sandwiched between two seats to control flow. Used in many hydrocarbon process applications, ball valves are capable of throttling gases and vapors and are especially useful for low-flow situations.
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There are four general types of ball valves: full port, standard port, reduced port, and v port. A full port ball valve has an oversized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted, but the valve is larger.
-Air, gaseous, and liquid applications requiring bubble-tight service.
-Low-point drains and high-point vents in liquid, gaseous, and other fluid services.
-Instrument root valves.
-Cooling water and feed water systems.