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  • High Requirements of Pipe Transmission on Ball Valves
    Posted: 09/23/2016 16:07:21 Hits: 5

    Long distance pipeline is a global energy supply line, from Arctic Circle to Equator, high mountains to seabed, high lands to deserts, crossing through earthquake zone, marshland, rivers, lakes and mountain slopes. Some of pipelines are erect. Some are buried under the ground and some are operated...

  • Reasons Causing Defects on Castings of Valve
    Posted: 09/23/2016 16:07:21 Hits: 4

    The followings are the reasons causing defects on castings of valve.   1. Pore Pores are formed by gas which cannot escape and remained in metal. The internal wall of pore is smooth and contains gas, which has higher reflectivity. Pores show spherality or ellipsoid basically (spot defec...

  • How a Gate Valve Functions
    Posted: 09/23/2016 16:07:21 Hits: 3

    As we know, gate valve is widely used to control the flow of liquid from straight line medium in many places. The instance ones would be in irrigation, also apply for various chemical plants to manage the path of different types of fluids.    On the basis of detailed designs, Gate va...

  • Tips for Installing Silent Check Valve
    Posted: 09/23/2016 16:07:21 Hits: 2

    Silent check valve is a kind of automatic valves whose disc can open or close automatically based on fluid media inside pipes flowing. The disc of valve rotates with the centerline of body. Under the pressure of media in one direction, the disc opens; when media flow reversely, the disc closes aut...

  • Differences between Forging and Casting Valves
    Posted: 09/23/2016 16:07:21 Hits: 9

    Forging is a kind of process that using metal forming machinery presses to metal billet, making it deform plastically to acquire mechanical properties, shape and size.    Forging is a common forming process widely utilized in machinery. Forging can eliminate cast loose and welding ho...

  • Properties of Materials Used for Superhigh Pressure Valve
    Posted: 09/23/2016 16:07:21 Hits: 2

    Nowadays, superhigh pressure technique has already been used for petrochemical industry, chemical industry, metal forming, powder metallurgy and other industries. Due to superhigh pressure technique widely applied, the performances of superhigh pressure valve have directly influenced on security, ...

  • Characteristics and Principles of Vent Butterfly Valve
    Posted: 09/23/2016 16:07:21 Hits: 8

    Characteristics of vent butterfly valve 1. The structure of vent butterfly valve is welded by center line disc and short steel plate, having compact structure, light weight, convenience for installation, small flow resistance, high flow capacity. It is not affected by high temperature expansion....

  • Structural Features of Flat Gate Valves
    Posted: 09/23/2016 16:07:21 Hits: 5

    Flat gate valves have following structural features: 1. The sealing structure of seat is elastic and equipped with pre-tightening force. The sealing between seat and sealing face is always face-to-face sealing.  2. The seat has self-cleaning performance, and it cannot be washed out direct...

  • Reasons Cause Leakage of Metal Seal Butterfly Valve
    Posted: 09/23/2016 16:07:21 Hits: 6

    Low temperature devices are constantly developed in China. The demands for low temperature valves are also gradually growing. To meet the demands of market economy developing, the structure of metal seal butterfly valve is improved. A three eccentric pure metal seal butterfly valve having high perfo...

  • Requirements for Assembling Technologies of Valves
    Posted: 09/23/2016 16:07:21 Hits: 4

    Valves are a kind of hardware products in common use. There are definite requirements for valves before or during assembling. Otherwise, valves having been assembled cannot show their excellent properties.    Requirements for valves before assembling: 1. According processing requir...