O what ball valve characteristics

O adopt fixed ball design, relative motion parts adopt minimum friction coefficient self-lubrication material, and operating torque is small, moreover sealing grease seal for a long time, make the operation more flexible. The main characteristic of o-type ball valve has a small fluid resistance. Ball valves are reducing, generally through two kinds of structure, no matter what kind of structure, the ball valve flow resistance coefficient is small. Not reducing valves for direct ball valve, also known as full flow type, the channel diameter is equal to the pipe diameter, only the equivalent length of pipe resistance losses of friction resistance. In all the valves, the ball valve fluid resistance is minimal. There are two ways to reduce the resistance of piping system: one is to reduce the fluid velocity, solution is to increase diameter and valve size, this will greatly increase the cost of pipeline system. Second is to reduce the local resistance of the valve, ball valve is the best choice. Increasing the tube diameter and valve size, which will greatly increase the cost of pipeline system. Second is to reduce the local resistance of the valve, ball valve is the best choice. O type ball valve switch quickly and conveniently. Ball valve need to rotate 90 degrees is completed fully open or close, so can quickly achieve open and close. Good sealing. The vast majority of ball valve seat is made of elastic material such as ptfe ethylene, seal made of metal and nonmetal materials, often referred to as soft seal. Soft seal has good sealing, and sealing surface roughness and machining accuracy is not high. Life is long. Because ptfe ( PTFE or F4) Have good self-lubrication, small friction coefficient and the sphere. Due to improved processing technology to reduce the roughness of sphere, thus greatly improve the service life of the ball valve. High reliability, the reason is a sphere and a pair of seating vice will not fault such as scratches, sharp friction losses; After stem instead of built-in type, eliminates the stem under the effect of fluid pressure, may be due to the packing gland to loosen fly out of accident hidden danger; Ball valves with anti-static, refractory structure, can be used to transport oil, natural gas, coal gas pipeline. As the channel level off is smooth, the body ball valve is more suitable for conveying viscous fluid, slurry and solid particles.