Features and advantages of API 607 American standard fixed ball valve
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. Emergency sealing with grease injection: 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, mitigating leakage.
2. Reliable stem seal and low operating torque: In addition to the standard sealing ring, an O-ring is also installed on the packing gland, ensuring the reliability of the stem seal with double sealing. The added graphite packing and grease injection minimize stem leakage after a fire. The stem sliding bearing and thrust bearing make valve operation easy.
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.
