Copper ball looking for one kind of place that corresponds with the use of valves, should first look into four kinds of basic types of throttle control valve, namely copper ball, rotating ball valve, brass ball valve with butterfly. Variety copper tabs way valve is widespread, and thus the number of use of premises to meet most needs, while always making it the first choice for a variety of valves. Copper ball tabs there are many, including the balance sheet adjustment, non-equilibrium tabs, elastic seat adjustment piece, bound adjustment tabs and full-size tablets. In many situations, a variety of valve configurations tabs be interchangeable.
Brass ball valve with excellent features, often enough to compensate for these deficiencies. Rotating ball valve flow relatively equal diameter copper ball great. While rotating ball valve control range greater than copper ball, but still better than most of the number of other types of valves. Rotating ball valve allows the pressure drop and temperature range allows a relatively small copper ball. Copper ball also has a number of drawbacks. The first was to limit the size of the valve (usually 16 inches); the second is with the same specifications vision valve (eg ball valve or butterfly valve) with a relative, whose capacity is relatively low; Third, higher prices, especially large diameter copper ball. However, in terms of reducing process variability, which generally limit the pressure drop 7.0x105kg / m2, at a suitable place at a temperature below 398 ℃ use. Float valve does not apply easily from liquid vacuoles, but when used in higher gas pressure drop, it is often able to recover a large noise.
Press the valve function to weigh, butterfly valves are high-grade. Butterfly valve of large flow rate, the cheapest price, and a variety of different caliber. Like, as long as the butterfly valve characteristic curve and other characteristics of a relatively patients, which greatly limits the butterfly valve to reduce process variability function. Due to this reason, the butterfly valve can only be used for load fixed locations. Although there are many different butterfly valve diameter, and can use the most number of cast alloys to manufacture, but the butterfly valve does not fit the size requirements of ANSI said face, does not apply easily from the vacuole fluid or noisy, etc. places. Copper ball float valve friction relatively smaller, lower price. Unique structure designed to control process variability on more accurate.