The biggest difference between butterfly valves and ball valves is that the butterfly valve is fully opened or closed by using a disc while the ball valve uses a hollow, perforated and pivoting ball to do that. Both the disc of the butterfly valve and the valve core of the ball valve rotate around their own axis. The butterfly valve can regulate the flow through its open degree while the ball valve are not convenient to do this. Butterfly valve is characterized by fast opening and closing, simple...
Difference between Ball Valve and Butterfly Valve Read
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Pneumatic actuator is famous for its highly reliable, efficient and safe motion control source and is one of the most popular engineering equipment. This article will discuss what the pneumatic actuator is and how it works. Pneumatic actuators are considered essential to hundreds of different industries, especially to applications where the opening and closing of valves takes place. They are also valuable in industrial applications where there is a fire or risk of ignition. If you want...
What is a Pneumatic Actuator and how does it Work? Read
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Ball valves are used in various industries and the aerospace industry is no exception. Ball valves are usually used in turbines for this particular industry. In this application, the ball valve is used to ensure the maximum efficiency output of the turbine by creating a bubble-tight seal while also being able to withstand high pressure and high temperature. In addition to this common and popular ball valve application, the ball valve is frequently used in the entire structure of many aircraft, such...
Application of Ball Valve in Aerospace Industry Read
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Structure Gate valves can be tightly closed depending on the medium pressure, thus achieving non-leakage. When the valve is opened and closed, the sealing surfaces of the disc and the seat always contact and rub against each other, so the sealing surfaces are easy to wear. When the gate valve is about to close, the difference between the upstream pressure and downstream pressure is very large, which makes the sealing surfaces wear more seriously. The structure of the gate valve is more complicated...
Difference between Gate Valve and Globe Valve Read
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Butterfly valve is a kind of valve that is opened and closed according to the rotation of the valve stem to drive the disc to rotate. In the cylindrical passage of the valve body, the disc is rotated around the axis to control the flow rate. When the disc is rotated a quarter turn, the valve is fully open. And the angle of the disc can be changed to adjust medium flow. Butterfly valve and the stem do not have self-locking capability. In order to effectively regulate the flow, worm gear reducer...
Working Principle of Butterfly Valve Read
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In the process of using the valve, there are often some perplexing problems. For instance, the valve can't be tightly closed. So how should do? If the valve is not tightly closed, first find out where the problem occurs and then solve it according to the corresponding methods. The general reasons and appropriate solutions for valve hard to close entirely are as follows. Reason one: There are impurities stuck on the sealing surface, and the impurities are deposited at the bottom of the valve...
Reasons and Solutions for Valve Hard to Fully Close Read
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Selection of valves shall comply with the following principals: 1. According to the use place and purpose of the valve, and after knowing the relevant regulations, specifications, standards and gaining approval, the valve suitable for various requirements can be selected. 2. Specify the working condition, applicable medium, working pressure and medium temperature. 3. Specify the nominal diameter matched with the pipeline. 4. Determine the connection type with the pipeline, including flange, inside...
Notes on Selection of Valves Read
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The check valve belongs to an automatic valve, and its main function is to prevent back flow of medium, reverse rotation of pump and drive motor, and relieving of container medium. Check valves can be used in pipelines to supply auxiliary systems where pressure may rise above system pressure. The valve is mainly divided into swing check valves (rotating according to the center of gravity), lift check valves (moving along the axis) and butterfly check valves (rotating...
What is Butterfly Check Valve? Read
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4. Flat gate valve The flat gate valve is a general-purpose valve that has been used in gas pipelines in recent years. The flow resistance is small at full bore, and the seals on both sides are formed by pressing a Teflon or rubber O-ring on the disc. When the valve is fully closed or fully open, it can't be airless in the middle cavity. It is not convenient for the user to quickly judge whether the valve is closed tightly when repairing. In order to achieve no air in the middle cavity, the...
Introduction to gas valves currently used in China gas industry - part two Read
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1. Oil-sealed plug valve In the 1980s, China's gas was mainly made of artificial coal, and there were more impurities and "gas glue" in artificial coal. The traditional single disc sluice valve used in the past is more and more unable to adapt to the needs of gas working conditions. This type of valve generally has the problem of being closed without enough tightness and stem sticking. And, the oil-sealed plug valve for gas pipeline solves the problem of being closed...
Introduction to gas valves currently used in China gas industry - part one Read
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