Ball valve advantages 1. Small fluid resistance, full diameter of the ball valve basically no flow resistance. 2. Simple structure, small size, light weight. 3. Close and reliable. It has two sealing surfaces, and the ball valve sealing surface material widely used in a variety of plastic, good sealing, can achieve a complete seal. In the vacuum system has also been widely used. 4. Easy to operate, quick opening and closing, as long as 90 ° rotation from full open to full close, easy to remote control. 5. Easy maintenance, ball valve structure is simple, the seals are generally active, demolition and replacement are more convenient. 6. In the fully open or fully closed, the ball and valve seat sealing surface and media isolation, the media will not cause erosion of the valve sealing surface. 7. Wide range of applications, the path from small to a few millimeters, up to a few meters, from high vacuum to high pressure can be applied. 8. Because the ball valve in the process of opening and closing wipe, it can be used for medium with suspended solid particles. Disadvantages of ball valve High precision, high cost, difficult to use in high temperature, such as impurities in the pipeline, easily blocked by impurities, resulting in the valve can not be opened. Ball valve by function classification: 1, bypass valve: the ball valve is usually open for static water, it is set by the bypass valve first pressure, that is, both sides filled with water; 2, air valve: water, exclude air take the float off the valve; When the air is used, the float descends on its own. 3, pressure relief valve: open the valve closed, the exclusion of pressure between the valve and the sealing cap water, so as not to wear the sealing cap. 4, sewage valve: discharge the lower part of the ball shell body of sewage. Ball valve installation and maintenance should pay attention to the following: 1, to leave the valve handle rotation position. 2, can not be used for throttling. 3, ball valve with transmission can be divided into: 1, pneumatic ball valve, 2, electric ball valve, 3, hydraulic ball valve, 4, pneumatic ball valve, 5, electro-hydraulic ball valve, 6,
Telescopic Mast ,Telescoping Antenna Mast,Telescopic Antenna Mast,Crank Up Telescopic Antenna Mast
TIANHEMAST , https://www.robomasts.com