2019 Xiamen International Marathon
- Jan 30, 2019
- Hits: 54
"Running in love with a city", 2019 C&D Xiamen Marathon started at 7:30 am on January 6th. A total of more than 36,000 runners signed up. The actual number of participants was 28,208, including...
Valves with Heating Jackets by Dervos
- Jan 30, 2019
- Hits: 60
A heating jacket is a metal enclosure installed around the body or the whole of the valve with the purpose of maintaining the temperature of the fluid flowing through the valve. The jacket is supplied...
How to select the right pneumatic solenoid valve
- Jan 26, 2019
- Hits: 62
Slide gates and diverter valves that use pneumatic actuators (air cylinders) must be equipped with a properly matched pneumatic solenoid valve. The solenoid valve controls the flow of air pressure to...
Bellow Seal Valves - a solution to prevent leakage
- Jan 26, 2019
- Hits: 76
Irrespective of proper selection, installation, and periodic and preventive cares on conventional valves, leakages cannot be totally eliminated. Though performance seems to be satisfactory initially,...
Manufacturing and inspection techniques for full welded ball valves
- Jan 21, 2019
- Hits: 31
The full welded ball valve described in this article uses single spherical welding with a fully automatic welding process. The ball valve has characteristics of uniform force, reliable sealing, compact...
How to judge whether the valve leakage is internal or external
- Jan 21, 2019
- Hits: 108
When using electric valves, various faults are often encountered. Valve leakage is a common type among many faults, and the leakage of electric valves generally has two situations: internal leakage and...
What is the difference between ERW and CDW pipes?
- Jan 15, 2019
- Hits: 3956
Electric resistance welded (ERW) pipes are longitudinally welded from metal after moving it afterward. CDW pipes are produced by expelling the metal to the required length; Hence ERW pipes have a welded...
A Presentation Competition Was Carried Out in DERVOS
- Jan 15, 2019
- Hits: 38
On January 4th, a presentation competition was carried out in DERVOS, with the target that every salesman would be equipped with the capability to present our company to the customers. Once customers...
Special Requirements for Natural Gas Pipeline Valves
- Jan 10, 2019
- Hits: 85
1. Quick action, automatic shutdown Generally, the managers stay in the station or central control room, the pipeline valves are required to be able to automatically cut off when a serious...
Sealing Types of Ball Valves
- Jan 10, 2019
- Hits: 316
Soft seal—in the inlet and outlet of the floating ball valve, implant the valve seat separately as symmetrical as possible. Seat provides initial preload by its own elasticity. This construction...