Technical Articles

  • 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: 4

    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 ...

  • Factors to Be Considered in Butterfly Valves' Design (Part Two) 
    Posted: 08/12/2017 16:06:52 Hits: 10

    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 pre...

  • Factors to Be Considered in Butterfly Valves' Design (Part One)
    Posted: 07/27/2017 16:48:33 Hits: 11

    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
    Posted: 07/20/2017 17:09:24 Hits: 6

    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 co...

  • The Characteristics of Valves' Outer Leakage
    Posted: 07/06/2017 17:05:45 Hits: 8

    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 corr...

  • Differences among Single Offset Butterfly Valves, Double-offset Butterfly Valves and Triple Offset Butterfly Valves
    Posted: 05/08/2017 17:17:16 Hits: 19

    ​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 ...

  • The Introduction of Valve Connection and Valve body Material
    Posted: 02/09/2017 11:44:47 Hits: 12

    Valve is a control unit in fluid conveying system, with functions of cut-off, regulation, guidance, pressure regulator, pressure relief, diversion and effusion, preventing the reverse flow, etc. All kinds of valves from the most simple globe valve to extremely complex and automatic control system ha...