Page 9 of Latest News, Dates, Events, Press, Articles
Spring Festival Holiday

Spring Festival Holiday

  • Jan 20, 2013
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Christmas is all around us. Now the Spring Festival is coming. We will take ten days off from Feb.8th to Feb.17th. You can still contact us through email during this time period. Prompt reply might n...

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Nov.27th-30th 2012 OSEA

Nov.27th-30th 2012 OSEA

  • Dec 11, 2012
  • Hits: 419

In 2012, we attended the 19th International Oil&Gas Industry Exhibition & Conference (OSEA). We meet our customers and new friends in the exhibition. After candid talks with them, Dervos g...

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Common Faults and Preventive Measures of Gate valves

Common Faults and Preventive Measures of Gate valves

  • Jul 26, 2016
  • Hits: 52

Gate valves are the main components of the oil (gas) wellhead, several kinds of the common faults in the use of the common faults as follows.  1. Leakage between gate valve and gate valve juncti...

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