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Knife gate valve introduction and its characteristics
Knife gate valve entered China in the 1980s. In less than two decades, its use has expanded from ordinary fields to a wider range of industries, from coal preparation, gangue discharge, and slag discharge in mines and power plants to Urban sewage treatment has evolved from general industrial pipelines to specialized pipeline systems for food, […]
Gate valve characteristics and installation notes
Gate valve characteristics: Light weight The body is made of high-grade nodular cast iron, the weight is about 20%~30% less than the weight of traditional gate valve, and the installation and maintenance are convenient. Flat bottom brake seat: Traditional gate valves often silt in the grooves at the bottom of the valve due to foreign […]
Classification and advantages of gate valve
Gate valve types: There are many domestic manufacturers of gate valves, and most of the connection dimensions are not uniform. Mainly divided into the following categories: 1. According to JB/T2203-1999 “Structural Length of Gate Valve”, the standard valve of the Ministry of Machinery; 2. According to GB/T12221-2005 “Metal Valve Structure Length”, the national standard valve; […]
Working principle and movement mode of gate valve
The gate valve is a gate for opening and closing. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed through the contact between the valve seat and the […]
The difference between globe valve and check valve
With the development of high-tech industry, various valves are often used in daily life. Today we will understand the difference between globe valves and check valves. The difference between globe valve and check valve: 1. Check valve and stop valve are not the same thing, the difference between the two is mainly that the structure […]
Electric globe valves’ structural features and installation attention
Structural features of electric globe valve: 1. Open and close without friction. This function completely solves the problem of traditional valves affecting the sealing due to mutual friction between the sealing surfaces. 2. Top-mounted structure. The valves installed on the pipeline can be directly inspected and repaired online, which can effectively reduce device shutdown and […]
Characteristics and working principle of electric globe valve
Features of electric globe valve: The fluid resistance is small, and its resistance coefficient is equal to that of a pipe section of the same length. Simple structure, small size and light weight. Electric globe valve It is tight and reliable. The sealing surface material of the gate valve is widely used plastic, and it […]
Comparison of bellows globe valve and ordinary globe valve
Comparison of bellows globe valve and ordinary globe valve: 1. Double sealing design (bellows + packing) If the bellows fails, the stem packing will also avoid leakage and meet international sealing standards. 2. There is no fluid loss, reducing energy loss and improving plant equipment safety. 3. Long service life, reduce maintenance times and lower […]
Classification of the globe valves-(2)
According to the classification of purposes, the globe valve can be divided into the following types: The fluorine-lined stop valve: it is suitable for various concentrations of aqua regia, sulfuric acid, hydrochloric acid, hydrofluoric acid and various organic acids, strong acids, strong oxidants, and various concentrations of strong alkali organic solvents and other Use on […]
Classification of the globe valves-(1)
According to the channel direction, the globe valve is devided into 4 types: 1) Straight-through globe valve. 2) Direct flow stop valve: In direct flow or Y-shaped stop valve, the flow passage of the valve body is in a diagonal line with the main flow passage, so that the damage degree of the flow state […]