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  • The Application Field of All Kinds of Valves
    Posted: 05/15/2015 11:18:22  Hits: 257
     Valves are widely used in various industries, such as oil, petrochemical, chemical, metallurgy, electric power, water conservancy, urban construction, fire protection, machinery, coal, food and other industries. At present, on the market, the most-used and most common valves are ball valves, g...
  • Electric Actuator Selection for Electric Butterfly Valve
    Posted: 05/09/2015 11:41:17  Hits: 364
    Electric butterfly valve is made up by butterfly valve and electric actuator, therefore, after the butterfly valve is determined, how to correctly choose electric actuator to meet the engineering need in practical use is becoming important. 1. Allowed value of stem diameter For lifting lever valve,...
  • Reason and Solution for the Failure of Locator Calibration
    Posted: 04/30/2015 07:50:00  Hits: 286
     Usually, when calibrating the locator of small valves, you can use the automatic calibration function of hand operator directly. But sometimes, it may have something wrong. In this case, you can use the manual calibration function instead.  But if both of the functions don not work, you ...
  • Common Materials of Valve Stem
    Posted: 04/21/2015 11:09:12  Hits: 307
    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: 410
    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: 504
    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: 456
    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...