Valve is applied to Petrochemical Industryadmin
Valve has quite numerous varieties and specifications, depending on the structure and function of the opening and closing parts, the valve can be divided into the valve, closing valves, throttle valves, ball valves, plug valves, butterfly valves, check valves, diaphragm valves , steam traps, safety valves. When open and close valves, a variety of control methods can be used. Such as manual, electric, pneumatic, hydraulic, electric – gas or electric – hydraulic linkage and electromagnetic drive, etc; or under the influence of pressure, temperature, or other forms of sensor signals, a predetermined action requirements, or just a simple on or off.
Valve is extremely wide applied, in various types of petrochemical and chemical apparatus, piping material costs account for about 15% to 20% of the total investment, while investment costs valves and accounts for about 50% of the total cost of the pipe, in which the various the proportion of different types of valves, oil refining equipment, for example, various types of valves in the apparatus of the total number of valves rates were: 80% of the gate valve, globe valve 8% and 6% of the check valve, the three valves in the oil chemical production equipment is the most widely used valves, other valves 6%, valves investment accounted for 5% to 8% means. 250 tons / year of crude oil distillation unit and 1.4 million tons / year catalytic cracking.
For example, the valve specifications representing the proportion of the total number of valves: DN≥400 3%, DN150 ~ 350 12%, DN50 ~ 100 25%, DN≤40 60%