The main selection principle of ball valve

Oil and natural gas transmission main line, need to clean the pipeline, and need to be buried in the ground, choose full-bore, full-welded ball valve; buried in the ground, choose full-bore welded connection or flanged ball valve; branch pipe , Use flanged connection, welded connection, full-bore or reduced-bore ball valve. 2. For the pipelines and storage equipment of refined oil, use flanged ball valves. 3. On the pipeline of city gas and natural gas, use the floating ball valve with flange connection and internal thread connection. 4. In the oxygen pipeline system in the metallurgical system, it is advisable to use a fixed ball valve that has undergone strict degreasing treatment and is flanged. 5. In the pipeline system and device of low temperature medium, the low temperature ball valve with valve cover should be selected. 6. On the pipeline system of the catalytic cracking unit of the oil refining unit, the lifting rod type ball valve can be selected. 7. In the device and pipeline system of corrosive medium such as acid and alkali in chemical system, it is advisable to choose all stainless steel ball valve made of austenitic stainless steel and PTFE as the valve seat sealing ring. 8. Metal-to-metal sealing ball valves can be used in pipeline systems or devices of high temperature medium in metallurgical systems, power systems, petrochemical plants, and urban heating systems. 9. When flow adjustment is required, a worm gear driven, pneumatic or electric regulating ball valve with V-shaped opening can be selected. The ball valve category products produced by the valve have the following characteristics: (1) It has the lowest flow resistance. (2) It will not get stuck when there is no lubricant, and can be reliably applied to corrosive media and low boiling point liquids. (3) Complete sealing can be achieved within a large range of pressure and temperature. (4) It can realize rapid opening and closing, and when the valve is opened and closed quickly, the operation has no impact. (5) The spherical closure can be automatically positioned in position. (6) The working medium is reliably sealed on both sides. (7) The sealing surface will not corrode when the medium passes through the valve at high speed. (8) The structure is compact and light in weight, and is suitable for low temperature medium systems. (9) The valve body is symmetrical and can be very It can withstand the stress from the pipeline well. (10) The closing piece can withstand the high pressure difference when it is closed. (11) The maximum service life can reach 30 years, and it is the most ideal valve for oil and natural gas pipelines.
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