Technical Articles
  • Common Materials of Valve Stem
    Posted: 04/21/2015 11:09:12  Hits: 308
    These following factors will have an influence on how to choose the material of valve components. 1. The pressure, temperature and feature of working medium. 2. The force situation of this component and the role it plays in valve structure. 3. Good manufacturability. 4. When meeting the conditions ...
  • The Equipment Features of General Valves
    Posted: 04/14/2015 14:25:11  Hits: 268
    Screwed connection valve:  This kind of connection is usually carried out by processing the valve inlet and outlet into taper or straight pipe thread so as to connect it to the tapered pipe thread or pipeline. However, this connection may lead to large channel leakage, so you have to use sealan...
  • How to Deal With Internal/External Leakage of Glove Valves
    Posted: 04/08/2015 11:33:11  Hits: 412
    For flange leakage, you need to tight the bolt again. If not yet, open the flange to see if there is any damage to the flange gasket. For packing leakage, you need to compress the packing gland. If the packing is too loose, then add more packing. If the leakage is directly on the body, weld it (only...
  • How to Choose Materials of Valves Seal Surface
    Posted: 01/16/2015 12:03:30  Hits: 441
    1. Anti-corrosion. “Corrosion” is the process where the seal surfaces are eroded by medium. If the surfaces are destroyed, their seal ability will become poor. Therefore, the materials of seal surfaces must resist corrosion. Their anti-corrosion ability depends on their chemical stabilit...
  • Notes for Installation of Decompression Valves
    Posted: 01/07/2015 14:53:23  Hits: 508
    Decompression valves are newly invented and applied to practice in recent years. They achieve extensive attentions in construction and fire-control water supply fields.   Decompression valves are installed on the outlet pipes of fire pumps. They are closed in normal times and automatically open...
  • Methods of Choosing Oil and Chemistry Valves
    Posted: 01/03/2015 09:50:39  Hits: 457
    There are various kinds of valves and many complicated working conditions. To choose the most suitable valves for pipe system, you should know:  First, the characters of valves;  Second, the steps and reasons to select valves;  Third, the principles of choosing valves for oil and chem...
  • The Technical Requirements of Nuclear Power Valves
    Posted: 12/18/2014 08:55:40  Hits: 492
    Nuclear power valves, due to their special, complex and harsh service conditions, coupled with large amount and wide range, have higher requirements.   1. Working Conditions of Nuclear Power Valves. Transport medium of nuclear power valves mainly contains: saturated steam, condensate, radioacti...
  • What Are Ventilated Butterfly Valves?
    Posted: 12/09/2014 09:43:32  Hits: 2037
    Purpose of Ventilated Butterfly Valves A ventilated butterfly valve is a type of non-sealed butterfly valves. It is widely applied in 0.1Mpa-NP pipes used in production process such as architecture, metallurgy, mine and electricity. It is used to connect, switch, or adjust pipes.    Major Chara...
  • Common Materials of Foreign Ball Valves
    Posted: 12/06/2014 15:28:00  Hits: 422
    Evolving material has a significant impact on the development of ball valve. There are a wide range of materials for you choose, so valves become more reliable and the range of application becomes wider. Currently, a variety of stainless steels and corrosion resistant alloys, as well as improved pol...