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Throttle control valve classification applicable and application selection
We usually choose four types of throttle control valve to be used in the specific environment, they are often come into contact with the cage ball valve, rotary float valve, eccentric valve and butterfly valve. Cage Ball Valves in a wide range of forms to meet the needs of most applications. There are many types of cage ball valves that are interchangeable, in most cases, with a variety of valve plate configurations. However, cage valve also has several disadvantages: First, the size of the valve is limited; second sight valve with the same size compared to the lower capacity; third is the higher price. However, cage ball valves offer superior performance in reducing process variability. Rotating float valve flow and the same diameter cage valve compared to larger. Although rotating float valves have a greater control range than cage valves, they allow pressure drops and allowable temperature ranges to be smaller than cage valves. Floating ball valve is not suitable for the easy bubble liquid, in the gas with high pressure drop, often make more noise. Eccentric valve friction than the smaller ball valve, the price is lower. Its unique structural design controls flow variability more precisely. According to the performance of the valve, the butterfly valve is a low valve. Butterfly valve flow, the cheapest price, there are many different caliber. However, the butterfly valve characteristic curve is only a proportional curve, it can only be used for fixed load situations. Although the butterfly valve has a variety of different caliber, butterfly valve does not meet ANSI requirements for face-to-face size, does not apply to easily vacuumed fluid or noise greater occasions.