Technical Articles

  • How to choose valves in the industrial pipeline? (Part two)
    Posted: 08/22/2018 17:40:42 Hits: 3

    Selection of valves Valves are generally selected according to factors such as characteristics of media, operating conditions and valve requirements. The major Chinese valve manufacturer can manufacture various types of valves according to the above standards to meet the needs of refining and chemic...

  • How to choose valves in the industrial pipeline? (Part one)
    Posted: 08/09/2018 09:02:04 Hits: 8

    A valve is an important component of refining and chemical pipeline systems and plays an important role in petroleum processing. Valves are used to connect and cut off the medium, prevent the medium from flowing backwards, adjust the medium's pressure and flow rate and distribute the medium. Se...

  • Corrosion Fatigue of Valves
    Posted: 01/15/2018 10:20:02 Hits: 16

    The introduction of corrosion fatigue   1. The definition of corrosion fatigue Corrosion fatigue is a kind of corrosion that occurs under the combined effect of cyclic stress of equipment and the corrosive environment, involving many industrial sectors such as propeller, shaft, rudder, aircraft...

  • Choosing Valves Based on Industry Characteristics (Part Two)
    Posted: 12/05/2017 14:47:05 Hits: 8

    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 th...

  • Choosing Valves Based on Industry Characteristics (Part One)
    Posted: 11/02/2017 09:17:54 Hits: 7

    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 th...

  • The Technical Parameters of Valves for Supercritical Thermal Power Units
    Posted: 10/26/2017 16:57:54 Hits: 10

    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, F9...

  • The Demand for Valves in Petrochemical Industry (Part Two)
    Posted: 10/09/2017 15:12:55 Hits: 3

    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 ...

  • The Demand for Valves in Petrochemical Industry (Part One)
    Posted: 09/21/2017 18:00:52 Hits: 7

    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 pro...

  • Factors to Be Considered in Butterfly Valves' Design (Part Four)
    Posted: 09/13/2017 13:14:45 Hits: 5

    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 re...

  • Factors to Be Considered in Butterfly Valves' Design (Part Three)
    Posted: 08/26/2017 16:46:13 Hits: 10

    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 ...