Ball valve is widely used in petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmaceutical industry, water conservancy, electric power, municipal administration, steel and other industries, and plays an important role in the national economy.
There are two main type ball valve : metal seated ball valve and soft seated ball valve. Metal seated ball valve with both sides of the sealing are made of metal or other hard materials. Metal seated ball valve with poor sealing performance, but is high temperature resistance, wear resistance and good mechanical performance. The soft seated ball valve is that with seat which material is non-metallic materials with certain strength, hardness and temperature resistance. It has good sealing performance and can make zero leakage, but its service life and adaptability to temperature are relatively poor.
In the most severe industrial environment, valve defects will endanger safety, plant efficiency and reduce profitability, among which metal seated ball valve is the leader. These durable valves are ideal for the oil and gas industry, refining and power generation.
When it comes to ball valves, choosing the right seat material can be a difficult decision because you have several options. The determinants you need to consider include the materials used in the structure, the appropriate size and the type of design features, including v-ports, venting, double blocks. The more important consideration is the type of seat.
When selecting the valve seat, you should first fully understand the process conditions. Does your situation require a bubble to close tightly? Is the liquid corrosive? Does it contain abrasive particles? Is it under high pressure or high temperature? Once you have a firm grasp of these factors, your choice is obvious
For metal to metal seats, depending on the service conditions, the ball and seat ring can be hard faced in the sealing position by applying various coatings. Examples of these special coatings include satellite hardfacing, chromium carbide, tungsten carbide, and electrolytic nickel plating. Sealing is achieved by metal to metal contact between two hard coated surface areas.
Although metal seated valves are more expensive, the cost of downtime due to failure and replacement of soft seated valves should be considered. The efficiency and life of metal seated ball valves will pay off and offset higher prices. In short, metal seated ball valves are the best, durable, and economical choice for critical applications.
ZFV ( Zhejiang zhengfeng valve co., ltd ) have both metal seated ball valve and soft seated ball valve, we shall provide professional suggestions for different conditions .
Zhejiang Zhengfeng Valve Co., Ltd