6. Valves for petrochemical equipment a. Oil refining equipment Valves for oil refining equipment are mostly pipeline valves, and they are mainly gate valves, globe valves, check valves, safety valves, ball valves, butterfly valves and steam traps. Gate valves account for 80% of these valves, and these...
The valve is the control part in the fluid conveying system of the pipeline, and it is used for changing flow directions of channel sections and media. A valve has diverting, cutting off, throttling and other functions. From the simplest globe valve to the extremely complex various valves used in the...
The Technical Parameters of Chinese Valves for Supercritical Thermal Power Units Classification Names of Valves Materials (NPS) Normal Pipe Size(NPS) Pressure Rating Installation Position Type One 1. Gate valves WB36, F91, etc. ≤24" ≤4500 For water supply pipelines and stream pipelines...
Valves Specialized in Petrochemical Industry Among the valves specialized in petrochemical industry, the most typical valves are single-acting slide valves and double-acting slide valves of the catalytic cracking unit. The single-acting valve sends the catalyst with the carbon deposition after...
Petrochemical industry refers to the modern industry which produces petroleum products including gasoline, kerosene, diesel, lubricant and liquefied petroleum gas by using petroleum and natural gas as raw materials and alkene and arene through utilizing the light oil as the raw material so as to produce...
7. Service lives Normal failure of butterfly valves is leakages, and butterfly valves' leakages include external leakages and internal leakages. External leakages are mainly caused by erosion or corrosion, and internal leakages are caused by damage to sealed auxiliaries. Service lives usually refer...
4. Pressure loss and flow capacity Pressure loss and flow capacity essentially have the same parameters. The pressure loss is the measurement of the fluid resistance and is the difference between the valve's inlet pressure and outlet pressure. With the given flow, pressure losses are determined...
2. Process conditions We must fully understand the process conditions of butterfly valves' process systems before we design butterfly valves, and the process conditions include media's types (gases, liquid, solid phase and two-phase, multiphase mixture, etc.), medium temperatures, medium pressure,...
An simple introduction of butterfly valves Butterfly valves are kinds of regulating valves that have simple structures, which can be applied to controlling flows of various fluids, such as air, water, steam, corrosive media, mud, oil products, liquid metal and radioactive media. Butterfly valves'...
The Performance of Ball Valves The ball channel of the ball valve is circular; the circular flow runner of the non-reduced ball is connected with the circular flow runner of the valve body, which forms a straight section. So the ball valve has small flow resistance. According to different working conditions,...
1. The harms of outer leakage There is no lack of inflammable, explosive, toxic, corrosive media in industrial production. The media entering the atmosphere through the outer leakage of valves will cause more damages than inner leakage. Reasons are as follows: If the media are corrosive...
1.Centerline butterfly valve A centerline butterfly valve features in the structure that the axle center of valve stem, valve disc and body are in the same position. It has simple structure and is easy to manufacture. The common-used rubber lined butterfly valve is also a sort of centerline butterfly...