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  • Check Valve Introduction
    Posted: 09/23/2016 16:07:21 Hits: 22

    Check valve allows medium to flow in one direction, stopping counter flowing. The valve operates automatically. With the pressure of fluids, the disc opens. When fluids counter flowing, pressure make disc coincide with base and cut off medium.    Check valve is classified into swing ...

  • Advantage and Categories of Pneumatic Ball Valves
    Posted: 09/23/2016 16:07:21 Hits: 16

    Pneumatic ball valves use a ball with a hole as open-close part. The ball rotates with axis which is vertical to channel so that it can open or close valve. Pneumatic ball valves are used to connect or cut off medium inside pipes.   Advantages of pneumatic ball valves: 1. Pneumatic ball va...

  • Working Principles of Plug Valves Introduction
    Posted: 09/23/2016 16:07:21 Hits: 3

    Working principles of plug valves Plug valves are a type of valves which use plug with a hole as disc. The plug rotates along with the stem to realize on-off. Small plug valves without packing are also called as corker valve. Most of plug used by plug valves are cone (some also cylinder). The pl...

  • Structure of Extraction Check Valve
    Posted: 09/23/2016 16:07:21 Hits: 3

    Function of extraction check valve is quite singular. However, extraction check valve is indispensable for turbine.  Closing extraction check valve: when extraction check valve receives closing signal, air compressing three-way magnetic valve is opened. Compressed air connects with upper chamb...

  • Notes for Using Rubber Lined Valves
    Posted: 09/23/2016 16:07:21 Hits: 5

    Rubber lined valves have both cutting-off and flow regulation performance. Rubber line valves are convenient for on-off without influence on flow, ensuring the repeatability of flow. The valves open slowly, reducing the impact on instruments caused by instant pipe pressure. Rubber lined valves are...

  • Silver Brazing Used to Install Valve
    Posted: 09/23/2016 16:07:21 Hits: 5

    Before using sliver brazing to install valve, analyze the application to determine which valve is the most suitable for installation and keep in mind the service for which the valve is recommended. Before installing the correct valve, review the installation instructions to prevent damage to the v...

  • Xinhai Gate Valve Design Features
    Posted: 09/23/2016 16:07:21 Hits: 5

    Design of disc   Gate valves with NPS>/2 are of wedge flexible gate. Gate valves with NPS<2 are of wedge solid gate.   Body and bonnet connection   The body and bonnet of Class 150 - 900 gate valves are usually connected with studs and nuts. And the body and bonnet ...

  • Features of Power Station Welding Gate Valve
    Posted: 09/23/2016 16:07:21 Hits: 5

    Power station welding gate valve is used for pipes of high temperature high pressure water, oil or over-heating steam in thermal power plant, petrochemical industry and metallurgy. The valve has the advantages of wearing resistance, temperature resistance, corrosion resistance and long service lif...

  • Categories of plug valves
    Posted: 09/23/2016 16:07:21 Hits: 11

    1. According to structure, categories of plug valves can be classified into cylindrical plug valves and conic plug valves.   2. Materials of seal face (1) Non metal sealed plug valves: Seal face of plug valves is made of PTFE, rubber, nylon, PPL, flexible graphite and other soft materia...

  • Tips for Choosing Valves
    Posted: 09/23/2016 16:07:21 Hits: 4

    It is well known that valves are used to transport or control fluid and gas. Valves have wide application in fluid pipe system. Valves are mainly used to separate equipment and pipe system, control flow rate, prevent backflow, control and release pressure. And in order to ensure that valves can pl...