As far as we know, a brass ball valve
is a kind of ball valve whose main material is brass, especially its valve body. Brass is an alloy of copper and zinc. It is used for decoration for its bright gold-like appearance and for applications where low friction is required such as locks, gears, bearings, doorknobs, ammunition, and valves. There are various standards for brass ball valves, such as standard number GB/T15185-1994, standard number NF/E29-354-2003, standard number JB/T8861-2004.
As for the working principle, it is similar to that of the ball valve. The brass ball valve is also one type of quarter turn valve with a ball placed in a passageway through which fluid flows. The ball has a hole, by which the valve opens and closes. When the ball is positioned in this way where the hole runs the same direction as the passageway, the fluid simply flows through the hole, and the valve is open. However, when the ball is positioned in this way where the hole is perpendicular to the passageway, the fluid cannot pass through, and the valve is closed. In a word, it is a very good applications for shutoff, throttling-control and fluid-control.
The brass ball valve has the following merits. In the first place, it has a very low fluid resistance. The full bore one basically has no fluid resistance. In the second place, the brass ball valve has a simple structure with light weight. So it is very easy to operate and repair. In the third place, the seal and the ball of the valve are often in close state so that the valve is very reliable and not easy to be eroded by the working medium. In the fourth place, it is applicable for regular operation and rapid opening and closing. Last but not least, the flow direction of medium is not limited by the mounting direction and it is very casual. Based on the above features, brass ball valves are widely used in residential and light commercial applications. The typical services include: multi-purpose shut-off valve for use in domestic hot and cold water systems, natural or bottled gas and compressed air systems. There are a lot of companies which are specialized in this valve at home and abroad. For example, Shanghai Qianzhe Valve Limited Company and German Forint FRING Valve Limited Company are the most professional and excellent producers.
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