What is a gate valve?
- Feb 14, 2019
- Hits: 53
A gate valve refers to a valve in which the opening and closing part (valve plate) is driven by the valve stem to move the sealing surface of the valve seat for lifting movement, and a...
The main differences between trunnion and floating ball valves
- Feb 12, 2019
- Hits: 359
Ball valves can be classified by material, structure, flow port, working principle and so on. As per the working principle and structure, we can divide ball valves into floating type and trunnion-mounted...
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: 30
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: 106
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: 3889
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...