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Ball valve with O-ball valve and V-ball valve points. O-type ball valve with floating structure, the core is precision castings, the appearance of hard chrome plated, seat made of reinforced PTFE material, the flow channel mouth and pipe the same caliber, great flow resistance, flow resistance is very small, when closed Leakage, the general use of the switch valve, 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 characteristics of approximately equal percentage. Depending on the process equipment can be selected pneumatic or electric, respectively, composed of pneumatic valve and electric ball valve, pneumatic valve in order to achieve proportional adjustment valve positioner to be equipped with, electric ball valve to be proportional to be adjusted to be selected electronic electric actuator or with servo amplifier Wait. From the material, can be divided into: carbon steel ball valve, 304 stainless steel ball valve, 316 ball valve and brass ball valve applications can be divided into: high pressure ball valve and low pressure ball valve ball valve: mainly used in petroleum, natural gas, hydraulic oil, construction machinery Low-pressure ball valve industry: mainly used in media such as corrosive water pipes! This article Keywords: ball valve