Technical Articles

  • Differences among Single Offset Butterfly Valves, Double-offset Butterfly Valves and Triple Offset Butterfly Valves
    Posted: 05/08/2017 17:17:16 Hits: 7

    ​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: 9

    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...

  • Valves in Water System of Heating Air Condition
    Posted: 09/23/2016 16:07:21 Hits: 13

    Common valves in water system of heating air condition include gate valve, globe valve and butterfly valve.   Gate vale For its moderate length, rotary adjusting rod and good regulating performance, gate valve is widely utilized in large caliber pipes.   Globe valve  Glo...

  • Features of Pull Rod Welding Ball Valve
    Posted: 09/23/2016 16:07:21 Hits: 15

    Pull rod welding ball valve has impressive performances in various industries. Because of excellent properties and high reliability, pull rod welding ball valve attracts more attentions than cast steel ball valve. Currently, pull rod welding ball valve has been widely applied in urban gas, urban h...

  • Learining How to Choose Materials for Gas Valves
    Posted: 09/23/2016 16:07:21 Hits: 12

    The materials and the quality of gas valves are so important that their disqualification will lead to leakage in-or-outside the body of the valve. If the strength, rigidity and overall performance of the components of the valve body cannot meet the requirements or even break, it will result in the...

  • Influences of Temperature on High Vacuum Butterfly Valve
    Posted: 09/23/2016 16:07:21 Hits: 9

    When high vacuum butterfly valve is used, temperature has great influences on its performance.   High temperature impacts on high vacuum butterfly valve: When the valve is used in the scope of creep temperature, prestressing force on bolts falls due to flanges, bolts and gaskets looseni...

  • Xinhai Statement of the Implement Valve Standards
    Posted: 09/23/2016 16:07:21 Hits: 12

    Following are the design, manufacture and inspection standards of our company.    Check Valve: API 6D 24th Specification for Pipeline and Piping valves  BS 1868-1975(R1990) Specification for Check Valves (Flanged and Butt-welding Ends) for the Petroleum, Petrochemical and Alli...

  • Characters of Soft or Hard Seal Valves
    Posted: 09/23/2016 16:07:21 Hits: 20

    Soft and hard seal are able to complement each other. The seal ability of soft one is better than hard one, however, hard seal now can also meet some requirements. Soft seal has better sealing ability, but can easily age, wear and has a short lifespan. Hard seal can be used longer, but has poorer ...

  • Structural Features of Electric High Pressure Gate Valve
    Posted: 09/23/2016 16:07:21 Hits: 16

    Electric high pressure gate valve uses flange connection, a kind of the whole direct casting valve. Electric high pressure gate valve is mainly used for water, oil and overheating steam pipes whose pressure below PN16.0MPa. Bonnet connection is used in central section, still having good sealing pe...

  • Check Valves Applied in Sewage Lifter
    Posted: 09/23/2016 16:07:21 Hits: 14

    Check valves applied on sewage lifter can solve the problems which are caused by sewage backflow. Drain pipes equipped with check valves can protect equipment from being damaged by sewage backflow, and reduce water storage capacity inside equipment meanwhile.   Sewage lifter is used to dr...