Il
valvolaè un componente di controllo nel sistema di trasporto del fluido della tubazione. Viene utilizzato per modificare la sezione di passaggio e la direzione del flusso del fluido. Ha le funzioni di deviazione, interruzione, regolazione, strozzamento, controllo, deviazione o scarico della pressione di troppo pieno.
Valvoleused for fluid control, from the simplest shut-off valvola to the various valvolas used in extremely complex automatic control systems, have a wide range of varieties and specifications, and the nominal diameter of the valvola ranges from extremely small instrument valvolas to large diameters up to 10m. Valvolefor industrial pipelines. Ilvalvola 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. Ilworking pressure of the valvola 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℃. Ilvalvola 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. Ilvalvola 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.
Ilpurpose of the valvola Ilvalvola 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 valvola has the following purposes: 1. Cut-off valvola: connect or cut off the medium in each section of the pipeline. Such as gate valvola, globe valvola, ball valvola, plug valvola, diaphragm valvola, butterfly valvola, etc. 2 Regulating valvolas: Regulate the flow and pressure of the medium in the pipeline. Such as throttle valvola, regulating valvola, pressure reducing valvola, safety valvola, etc. 3 Shunt valvola: change the flow direction of the medium in the pipeline, used to distribute, separate or mix the medium. Such as distribution valvolas, three-way plug valvolas, three-way or four-way ball valvolas, traps, etc. Valve classification There are many types of valvolas. With the continuous improvement of the process and performance of various complete sets of equipment, the types of valvolas are still increasing, but in general they can be divided into two categories: automatic valvolas rely on media (liquid, gas, Steam, etc.) a valvola that operates on its own. Such as safety valvolas, check valvolas, pressure reducing valvolas, traps, hydraulic control valvolas, emergency shut-off valvolas, exhaust valvolas, etc.
