The opening and closing part of a ball valve is a ball with a circular channel, which rotates around the axis perpendicular to the channel. The ball rotates with the valve stem to achieve the purpose of opening and closing the channel. Ball valves can be closed with only 90 degree rotations and a small torque. According to the requirements of the operating conditions, different driving devices can be assembled to form a variety of different control methods of ball valves such as electric...
Working Principles of Ball Valves Read
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The intelligentized telescopic frictionless ball valve, one new valve product, has been put into use, which can improve the safety of oil and gas pipelines. It was learned from the Sixth Academy of Aerospace Science and Technology Group that an intelligentized telescopic frictionless ball valve was jointly developed with South China Branch of Academy and Sinopec Sales. And it was put into use, marking that China has achieved new progress in oil and gas pipeline innovation ability. Compared...
Intelligentized Telescopic Frictionless Ball Valve Has Been Put into Use Read
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The disc of the ball valve is like a globe. This is a kind of valve which is opened and closed by rotating the center of the valve body. It is suitable for cutting off water flow and changing the distribution of water flow on the pipeline with low pressure and small diameters. Notes for installation 1. There should not be metal debris, fiber, grease (except for the specified items), dust, other impurities and foreign matters during installation. They are not allowed to adhere...
Notes and Ways to Prolong the Service Life of Ball Valves Read
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Valve is a product with low margin, but its market is very competitive in China. In terms of the distribution on the valve market, it is mainly based on the construction of project. Valves are mainly used for petrochemical industry, power sector, metallurgy sector, chemical industry and urban construction department. The main applications of petrochemical industry are API standard gate valves, globe valves and check valves. High pressure power station gate valves, globe valves, check valves...
The Reason for Fierce Valve Competition in China Read
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A ball valve in the pipeline is mainly used to cut off, distribute and change the flow direction of the medium. It only can be rotated 90 degrees, then it can be closed tightly with a small torque. In addition to pipeline parameters, the environmental conditions in which electric valves are used should be paid special attention to. As an electric actuator in an electrically operated valve is one electromechanical device, the use condition is greatly affected by the use environment. In...
Notes for Quick Installation of Ball Valves Read
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2.1.2 Three-dimensional motion simulation In order to verify the reliability of the design and calculation of the eccentric distance of the sphere and the inclination angle of the valve seat, the SolidWorks software was used to simulate the process of assembling the sphere. Fixed the valve seat, and made the sphere move vertically up and down. As shown in Figure 7, in the process of simulating the installation of the sphere, even if the dimensions of the sphere and valve seat met...
Structural Analysis & Design of a New Type of Ultra-low Temperature Floating Ball Valve (Part Three) Read
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2. A new type of structural design of the ultra-low temperature floating ball valve Given that there are disadvantages for the current common floating ball valve structure, a new type of ultra-low temperature floating ball valve is conceived, so that it can not only meet the required sealing performance, but also realize the online maintenance function, reducing the processing difficulty and meeting the requirements for easy disassembly and assembly. ...
Structural Analysis & Design of a New Type of Ultra-low Temperature Floating Ball Valve (Part Two) Read
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Abstract: A new type of structural design plan of the ultra-low temperature floating ball valve was proposed based on the structural analysis of the existing common ultra-low temperature floating ball valve. The design difficulties of the eccentric distance of the ball and the wedge-shaped valve seat were analyzed, and the three-dimensional motion simulation verification was carried out. The sealing of the middle channel and stem of the ultra-low temperature valve was discussed, and suitable...
Structural Analysis & Design of a New Type of Ultra-low Temperature Floating Ball Valve (Part One) Read
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Internal pressure self-sealing structure in the middle cavity For slab gate valves with class over or equal to 900, a pressure self tightening sealing valve bonnet is adopted, which has a unique seal and is designed as a metal sealing ring. When the sealing ring is under pressure, as the pressure difference increases between the upper and lower sides, the sealing ring elastically deforms during the extrusion process to obtain a reliable seal. The sealing ring can be used repeatedly,...
Design of High-pressure Slab Gate Valves for High-sulfur Natural Gas (Part Three) Read
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