Caratteristiche e vantaggi dell'API 607 Valvola a sfera fissa standard americano
A fixed ball valve is a ball valve with a fixed shaft. Depending on the installation of the seat seal ring, there are two structures: a front-seal seat and a rear-seal seat. Fixed ball valves are mainly used for high-pressure, large-diameter applications.
Advantages of fixed ball valves:
1. Sigillatura di emergenza con iniezione di grasso: In case of unexpected seat seal failure due to foreign objects in the medium or fire, the grease injection valve provides a quick connection to a grease injection gun. The inlet pump can easily and quickly inject grease into the seat seal, attenuazione delle perdite.
2. Reliable stem seal and low operating torque: In aggiunta all'anello di tenuta standard, an O-ring is also installed on the packing gland, ensuring the reliability of the stem seal with double sealing. La baderna in grafite aggiunta e l'iniezione di grasso riducono al minimo le perdite dello stelo dopo un incendio. Il cuscinetto scorrevole dello stelo e il cuscinetto reggispinta facilitano il funzionamento della valvola.
3. Full-bore or reduced-bore: Full-bore or reduced-bore structures can be selected as needed. Full-bore valves have the same flow orifice diameter as the pipeline inner diameter, facilitating pipeline cleaning. 4. Extendable Stem: The valve stem can be extended to meet installation or operational needs. Extended stem ball valves are particularly suitable for applications requiring underground pipeline installation, such as city gas pipelines. The extended stem dimension is determined according to customer requirements.
5. Flexible Operation: Utilizing valve seats and stem bearings with a low coefficient of friction and excellent self-lubrication, the valve’s operating torque is significantly reduced. Therefore, even without the provision of sealing grease, the valve can be operated smoothly and flexibly for extended periods.
