Views: 0 Author: J-VALVES Publish Time: 2024-04-24 Origin: Site
Sealing Comparison
(I) Sealing Performance of fully welded Ball Valves
The sealing performance of fully welded ball valves is one of their most significant advantages. The valve body adopts an integral welding structure, eliminating potential leakage points at traditional flange joints. This design enables the fully welded ball valve to achieve an almost "zero leakage" level in terms of sealing. Its sealing surface usually consists of a polytetrafluoroethylene (PTFE) sealing ring and a spring combination, which can adapt to a wide range of pressure and temperature changes. In addition, the streamlined channel design of the fully welded ball valve further reduces fluid resistance while ensuring the smooth flow of the medium.
(II) Sealing Performance of Flanged Ball Valves
The sealing performance of flanged ball valves mainly depends on the sealing gasket at the flange joint and the tightening force of the bolts. Although the flange connection provides the convenience of disassembly, this connection method is relatively weak in terms of sealing. In environments with high pressure, high temperature, or corrosive media, the sealing gasket at the flange joint may be at risk of leakage due to aging, wear, or bolt loosening. Moreover, the structure of the flanged ball valve is relatively complex, increasing the number of sealing surfaces and thus further reducing its overall sealing performance.
(III) Summary of Sealing Performance
From the perspective of sealing performance, fully welded ball valves are significantly superior to flanged ball valves. fully welded ball valves eliminate potential leakage points through an integral welding structure, while flanged ball valves rely on the sealing of the flange connection and have a certain risk of leakage. In applications that require high sealing performance, such as in the transportation pipelines of flammable and explosive media like natural gas and oil, fully welded ball valves are a more reliable choice.
Durability Comparison
(I) Durability of fully welded Ball Valves
The durability of fully welded ball valves mainly benefits from their integral welding structure. Welded joints are more resistant to corrosion and wear than traditional threaded or flanged connections. In addition, the valve body of an fully welded ball valve is usually made of high-strength carbon steel or stainless steel materials. After special heat treatment, it can maintain stable mechanical properties under extreme temperatures and high-pressure environments. This design enables fully welded ball valves to operate for a long time under harsh working conditions without the need for frequent replacement or maintenance.
(II) Durability of Flanged Ball Valves
The durability of flanged ball valves is relatively low, mainly because the bolts and sealing gaskets at the flanged connections are prone to corrosion and wear. During long-term operation, the bolts may loosen due to vibration, and the sealing gaskets may lose their sealing performance due to aging. In addition, the structure of flanged ball valves is relatively complex, increasing the risk of component wear and further reducing their durability.
(III) Durability Summary
From the perspective of durability, fully welded ball valves are also superior to flanged ball valves. The integral welding structure and high-strength materials of fully welded ball valves enable them to operate stably for a long time in harsh environments, while flanged ball valves require more frequent maintenance and replacement due to the limitations of flanged connections.
