Ball Valve Suitable For The Occasion

In the industrial valve domain, ball valves are prominent for their unique traits. Their wide application spans key industries. However, aspects like seat seal material, cutoff mechanism, fire resistance, and various working condition suitability present both application possibilities and technical & selection factors needing in-depth study and precise understanding. Comprehending these key points is vital for professionals in pipeline system design, installation, and maintenance to make rational decisions, ensuring system efficiency, safety, and longevity.

1. Temperature Limitation
●Since ball valves typically utilize rubber, nylon, and PTFE for seat sealing rings, the operational temperature range is restricted by the properties of these seat seal materials. The specific temperature limits of the seat seal ring materials directly define the upper and lower bounds within which the ball valve can effectively function.

2. Cutoff Mechanism and Sealing Performance
●The cutoff function of a ball valve is achieved by the medium exerting pressure on the metal sphere, causing it to press against the plastic seats (in the case of a floating ball valve).
●Under the influence of a certain contact pressure, the seat sealing ring undergoes elastoplastic deformation in local areas. This deformation serves two crucial purposes: it compensates for any imperfections in the spherical manufacturing precision and surface roughness, thereby ensuring the reliable sealing performance of the ball valve.

3. Fire Resistance and Prevention
●Given that the ball valve seat seal ring is commonly made of plastic, when choosing the ball valve's structure and performance, careful consideration must be given to its fire resistance and fire prevention capabilities.
●Especially in industries such as petroleum, chemical, and metallurgy where flammable and explosive media are present, the use of ball valves in equipment and piping systems demands a heightened focus on fire resistance and prevention to mitigate potential safety hazards.

4. Recommended Applications
●Ball valves are well-suited for piping systems that require double-digit adjustment, strict sealing, can handle mud, resist wear, accommodate shrinkage channels, enable rapid 1/4 turn opening and closing movements, perform high pressure cutoff (with large pressure differences), operate with low noise, manage cavitation and gasification phenomena, have minimal atmospheric leakage, possess small operating torques, and exhibit low fluid resistance.

●They are also appropriate for lightweight structures, low pressure cutoff (with small pressure differences), and corrosive media piping systems. Additionally, ball valves can be selected for use in low temperature (deep cooling) devices and piping systems.

5. Industry-Specific Requirements
●In the metallurgical industry's oxygen piping system, a ball valve that has undergone strict skimming treatment is essential to ensure safety and proper functionality.
●When laying the pipeline and its associated components underground, a full diameter welded ball valve is required to meet the specific demands of the installation.
●If adjustment performance is a key requirement, a ball valve with a special V-shaped opening structure is necessary to achieve the desired level of control.

6. High-Temperature Applications
●In sectors such as petroleum, petrochemical, chemical, electric power, and urban construction, for piping systems operating at temperatures exceeding 200 degrees, a metal-to-metal sealed ball valve is the recommended choice to withstand the elevated thermal conditions and maintain effective sealing and performance.