Ball valve applications and classification

Ball valve works by rotating the ball to make the valve clear or blocked. Ball valve switch is light, small size, can be made of large diameter, reliable sealing, simple structure, easy maintenance, sealing surface and the spherical surface is often closed, easy to be media erosion, widely used in various industries. Ball valve can be roughly divided into 19 categories, there are floating ball valve, fixed ball valve, metal seal ball valve, V-type ball valve, wafer type ball valve, ball valve insulation, pipeline ball valve, ball valve, Three-way (Stone) ball valve, threaded ball valve, integral ball valve, low temperature ball valve, bellows ball valve, eccentric hemisphere valve, all-welded ball valve, special ball valve. O-type ball valve with floating structure, the core is precision castings, hard chrome plated appearance, the seat metal or reinforced PTFE material, the flow channel mouth and pipe the same caliber, great flow capacity, flow resistance is extremely small, off When no leakage, the general do switch valve use, especially for high viscosity, fiber, granular media. V-type ball valve with a fixed structure, the core opened with a V-shaped incision, proportional control can be achieved, the flow rate characteristics for the approximate percentage. Ball valve wide range of applications, ball valve can be applied to: 1, nominal diameter from 8mm to 1200mm. 2, the nominal pressure from the vacuum to 42MPa. 3, the working temperature from -204 ℃ ~ 815 ℃. Especially in the petroleum, chemical, metallurgical and other departments, the use of soft sealing ball valve in flammable, explosive media equipment and piping systems, but should pay attention to fire and fire. Normally, the sealing performance is strictly controlled at two positions, the mud, wear and contraction channels, rapid opening and closing movements (1/4 turn on and off), high pressure cutoff (large pressure drop), low noise, cavitation and gasification, A small amount of leakage to the atmosphere, the operating torque is small, the fluid resistance of small pipe systems, the recommended use of the ball valve. Ball valve is also suitable for light structure, low pressure cutoff (small pressure difference), corrosive medium piping system. Ball valves are also available in cryogenic (cryogenic) systems and piping systems. When required to have regulatory performance, the need to use a special structure with a V-shaped opening ball valve. In petroleum, petrochemical, chemical, electric power, urban construction, the working temperature above 200 ℃ piping system can choose metal to metal sealed ball valve. Oxygen piping systems in the metallurgical industry require the use of carefully degreased ball valves. In the oil pipeline and gas pipeline in the main line to be buried in the ground, you need to use full-bore welded ball valve. Ball valve is widely used in irrigation systems, mainly used in the branch pipe imports. Ball valve structure is simple, small size, resistance to water flow is also small, the disadvantage is that open or close too fast, will produce water hammer in the pipe (water pipe pressure suddenly changes in the pressure will rise). Therefore, the main pipe should not be used on the ball valve can be used in the dry, branch or on the end for flushing purposes, flushing sewage effect.

Control Valve

Control Valve,Flow Control Valve,Pressure Control Valve,Directional Control Valve

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