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The V-type ball valve combines the optimal control characteristics of the ball valve and the butterfly valve. Its development is closely related to the advancement of technology. Today, the product is widely used because it has the following advantages. (1) The integral valve body, without any pipe flange joints, avoids the influence of pipe or bolt stress on the sealing performance of the va...
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What is the difference between a forged steel ball valve and a cast steel ball valve? The difference mainly lies in the processing technology and processing method of steel: A cast steel ball valves is a kind of ball valve that is formed by pouring liquids into a mold and then allowing them to solidify. Alloy steel is the most common casting material. Cast steel is divided into cast carbon st...
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The V-type ball valve is a single-seat ball valve with a metal seat. The adjustment performance is the best in the ball valves, whose flow characteristics are equal percentages, and the adjustable ratio is up to 100:1. It has a shearing action between the V-shaped slit and the metal seat, and is especially suitable for media containing fibers, tiny solid particles, and slurry. During the...
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Ball valves are usually found in controlling the flow of high-weight fluids and gas lines. This is because that these valves don’t reduce the flow weight and limit liquid flow. Ball valves are dominantly put in where the supply pipe’s internal breadth is 6 inches or less. A ball valve is a valve used to divert the flow. When open, it gives access to the medium and when closed, it cuts off the medi...
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For trunnion-mounted ball valve, there is a metal seat ring and a soft seat insert to ensure the sealing performance of seat. The seat inserts are element mounted inside a metal seat ring and perform the same sealing functions as seat ring. There are mainly two types of seat insert materials, elastomeric and thermoplastic. Elastomeric seat insert is softer to achieve zero leakage of ball valve. Wh...
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Anti-static device is another basic and mandatory design for ball valve. During the operation of valve, the constant friction between ball and soft seat will generate static electricity. The spark caused by static electricity may ignite the inflammable fluid inside the valve and cause a potential fire hazard. To get rid of the hidden danger, an anti-static device is invented for ball valve. Like t...
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The blow-out proof stem is one of basic design features of ball valve. Ball valve stem is inserted from the valve body inside with integral T-type shoulder to provide blow-out proof effectively. It is internally inserted as a function of backseat to assure stem sealing safety. To describe it in details, the stem is sealed by o-rings & packing rings, and held in position by the stem housing whi...
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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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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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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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