Butterfly Valve Working Principle: A butterfly valve is a type of valve that operates by rotating the valve stem to simultaneously turn the disc, allowing or blocking the flow. Inside the cylindrical or conical passage of the valve body, flow is controlled. When the disc reaches a 90° angle, the valve is in the fully open position. The angle of the disc can be adjusted to regulate the flow of the medium. However, it lacks locking capability. To effectively control the flow, a worm gear...
Insight into Butterfly Valve Operation, Characteristics, and Applications Read
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Ball valves are commonly used control valves in industrial pipelines, known for their advantages such as simple structure, low flow resistance, and good sealing. However, during usage, ball valves may experience some common issues, including valve sticking, leakage, and seepage. Let's explore the common faults of ball valves and their corresponding troubleshooting methods. Valve Sticking When a ball valve is not operated for an extended period or operates ineffectively, it might become...
Common Faults and Troubleshooting Methods of Ball Valves Read
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When the newly built 6 000 kt/a atmospheric and decompression plant of a certain enterprise was started, the packing of the globe valve of the raw material line of the heating furnace leaked and caught fire, causing the plant to shut down. The disassembly analysis of the globe valve found that the gap between the valve stem shaft and the sealing seat hole was improper. Structural modification was carried out for the similar globe valve of the device, and the smooth operation of the device was realized....
Cause of Leakage and Fire of Globe Valve Packing Read
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The global mining industry, like the world economy, has the feature of obvious periodicity. In recent years, affected by uncertain and unstable factors in global economic development, the demand for global mineral products has been weakening, and the situation of global mining has shown a downward trend, and resource prices have fluctuated greatly. The status and development pattern of mine valves Mining valves are mainly used in two aspects: mineral processing pipeline control (low-pressure...
Valves Used for the Mining Industry Read
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The structure and characteristics of a multi-purpose valve combined with a steel gate valve and a check valve are analyzed, and the working principle of its operation without mutual interference is introduced. 1. Overview Both gate valves and check valves are general-purpose valves for cut-off and circulation. The direction of movement of the closing part of the gate valve is perpendicular to that of the fluid, and it is operated by a driving device. It is a forced sealing valve. The disc...
A Combination of Gate Valves and Check Valves Read
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1. Structural forms An elastic seated eccentric cylindrical plug valve is a new type of plug valve (Figure 5), which adopts an elastic seated eccentric structure. The plug is of crankshaft type, and the surface is completely covered with rubber. The valve seat is surfaced with corrosion-resistant alloy. There is a certain eccentric distance from the center of the plug’s sealing surface. The cross-section of the flow channel is rectangular. Figure 5 Eccentric plug valves 1. Valve bodies...
Elastic Seated Eccentric Cylindrical Plug Valves Read
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Cylindrical plug valves have an integral plug that rotates within a well-fitting cylindrical valve body. If a direct metal-to-metal seal is used, considerable torque is required to drive the plug valve. It can also be coated on the sealing surface of the valve body or the outer surface of the cock to reduce friction and improve sealing ability. Typical coatings include PTFE, RislanTM and ceramics. Plugs are hard-faced to reduce friction and corrosion. A PTFE sleeve can be installed between the plug...
Types and Structural Characteristics of Plug Valves Read
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A plug valve is a type of valve that has been in use for over a century. It is a simple and reliable valve that is used to control the flow of fluids in pipelines. The design of the plug valve consists of a cylindrical or conical plug that rotates inside the valve body to open or close the flow passage. A plug valve has several advantages over other types of valves. It has a low-pressure drop, which means that it does not impede the flow of fluids through the pipeline. It also has a tight seal,...
Plug Valves Read
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Solar valves At present, the utilization of solar energy mainly includes photovoltaic and photothermal power generation. The report released by the China Photovoltaic Industry Association predicts that from 2022 to 2025 showed that the average annual installed capacity of photovoltaics in the country will reach 85 million kilowatts to 101.25 million kilowatts, 10 times that of 2013, equivalent to the installed capacity of four Three Gorges power stations. In the field of photovoltaic power generation,...
Valves Used for Five Major Clean Energy Sources Read
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