O
válvulaé um componente de controle no sistema de transporte de fluido de tubulação. É usado para alterar a seção de passagem e a direção do fluxo do meio. Tem as funções de desvio, corte, ajuste, estrangulamento, verificação, desvio ou alívio de pressão de transbordamento.
Válvulasused for fluid control, from the simplest shut-off válvula to the various válvulas used in extremely complex automatic control systems, have a wide range of varieties and specifications, and the nominal diameter of the válvula ranges from extremely small instrument válvulas to large diameters up to 10m. Válvulasfor industrial pipelines. Oválvula can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals and radioactive fluids. Oworking pressure of the válvula can be from 1.3х10MPa to 1000MPa ultra-high pressure and working temperature From the ultra-low temperature of -269℃ to the high temperature of 1430℃. Oválvula can be controlled by a variety of transmission methods, such as manual, electric, hydraulic, pneumatic, worm gear, electromagnetic, electromagnetic-hydraulic, electric-hydraulic, pneumatic-hydraulic, spur gear, bevel gear drive, etc. ; Under the action of pressure, temperature or other forms of sensing signals, it can act according to the predetermined requirements, or simply open or close without relying on the sensing signals. Oválvula relies on the drive or automatic mechanism to make the opening and closing parts lift and slide Move, swing or rotate, thereby changing the size of the flow channel to achieve its control function.
Opurpose of the válvula Oválvula is a kind of pipeline accessory, it is a device used to change the section of the passage and the flow direction of the medium, and control the movement of the conveying medium. It has diversion, cut-off, adjustment, throttling, check, diversion or overflow Functions such as pressure relief.
Specifically, the válvula has the following purposes: 1. Cut-off válvula: connect or cut off the medium in each section of the pipeline. Such as gate válvula, globe válvula, ball válvula, plug válvula, diaphragm válvula, butterfly válvula, etc. 2 Regulating válvulas: Regulate the flow and pressure of the medium in the pipeline. Such as throttle válvula, regulating válvula, pressure reducing válvula, safety válvula, etc. 3 Shunt válvula: change the flow direction of the medium in the pipeline, used to distribute, separate or mix the medium. Such as distribution válvulas, three-way plug válvulas, three-way or four-way ball válvulas, traps, etc. Valve classification There are many types of válvulas. With the continuous improvement of the process and performance of various complete sets of equipment, the types of válvulas are still increasing, but in general they can be divided into two categories: automatic válvulas rely on media (liquid, gas, Steam, etc.) a válvula that operates on its own. Such as safety válvulas, check válvulas, pressure reducing válvulas, traps, hydraulic control válvulas, emergency shut-off válvulas, exhaust válvulas, etc.
