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What is a ball valve? Ball Valve is the quarter-turn valve of which the opening and closing member (ball) is driven by the valve stem and rotates around the axis of the ball valve. What are the ball valve types? In terms of valve structure, we have floating ball valve and trunnion-mounted ball valve. The ball inside the floating ball valve is free to float. In contrast, the trunnion ball is fixed ...
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In terms of valve structure, we could divide ball valve into floating ball valve and trunnion-mounted ball valve. The working principle for floating ball valve: The ball inside the valve body is floating, since it does not have lower stem to fix and support the ball. Under medium pressure, the medium pushes the ball, and the ball can generate a certain displacement and press on the sealing surface...
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In terms of types of bores, ball valves could be divided into full port ball valves and reduced port ball valve. In this article, we will discuss the main differences between them. Full Port Ball Valve A full port ball valve, also known as a full bore ball valve, has the same internal bore size as the nominal pipe size. For example, a 2-inch full port ball valve has a 2-inch valve opening inside t...
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We have many ways to classify ball valves. When it comes to the body style, ball valves can often be divided into side entry ball valve, top entry ball valve and fully welded ball valve. In this article, we will discuss about the differences among these three types. Side entry ball valves are the most common type we use in different industries. The valve is assembled from sides through bolts and n...
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Before we select an appropriate ball valve, there are many factors we need to take into consideration. Seat type is one of important perspectives. Soft Seated Ball Valve The seat ring in contact with the ball part is made of soft material, such as PTFE, RPTFE, Nylon, Devlon, Peek and so on. For floating ball valve, there is only one soft seat ring for one side seat. But for trunnion ball valve, th...
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Most of ball valves own the sealant injection system. In this article, we will explain why ball valve is installed with sealant injection fittings. Generally speaking, each ball valve has two sealant injection fittings. One is located at the stem area and the other seat area, like the picture shown below. The sealant injection system of ball valve plays a part as the emergency sealing or backup se...
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