Characteristics and advantages of (fixed ball valve)
Fixed ball valve characteristics :
1.Double blocking and discharge function: the fixed ball valve adopts spring pretightening floating valve seat, no matter when the valve is in full open or closed state, the upstream and downstream valve seat blocks the fluid, and the cavity retention in the valve body is discharged through the discharge valve.
2. Automatic pressure relief function: when the temperature of the retention medium in the valve cavity rises, it does not need to pass through the safety valve, but can automatically relieve the pressure only by the valve seat function, which is very important to ensure the safety of the valve when transporting liquid medium.
3. Fire safety structure: valves have fire safety functions, and their design and manufacture follow the requirements of api607 and api6fa specifications.
Advantages of fixed ball valve
1.Sealing emergency grease injection rescue: due to the unexpected failure of valve seat seal caused by foreign body or fire in the medium, the grease injection valve provides a rapid connection with the grease injection gun, which conveniently and quickly injects the seal grease into the seat seal position to alleviate the leakage.
2.Reliable stem seal and low operating torque: in addition to setting standard sealing ring, "o" sealing ring is also set on packing cover, which ensures the reliability of stem seal, and the leakage of valve stem after fire is minimized by adding graphite packing and sealing grease injection. Stem sliding bearings and thrust bearings make the valve easy to operate.
3. Full path or diameter reduction: full path or diameter reduction structure can be selected according to the need. The flow aperture of the full diameter valve is consistent with the inner diameter of the pipeline, which is convenient for pipeline cleaning. 4.The valve stem can be lengthened: according to the need of installation or operation, the valve stem can be extended. Extended rod ball valve, especially suitable for city gas and other occasions where pipelines need to be buried. The size of the extended stem is determined according to the needs of the customer.
5.Flexible operation: the valve seat and stem bearing with small friction coefficient and good self-lubricating property are adopted, which greatly reduces the operating torque of the valve. Therefore, even in the absence of sealed grease, the valve can be operated flexibly and freely for a long time.