Advantages of pneumatic fixed ball valve 1. Full bore or reduced diameter: Full bore or reduced diameter structure can be selected as required. The full-bore valve flow orifice diameter is consistent with the inner diameter of the pipeline to facilitate pipeline cleaning.
2, the valve stem can be lengthened: according to the needs of installation or operation, the valve stem can be lengthened. The extended rod ball valve is especially suitable for occasions where underground gas pipelines need to be buried. The length of the stem is determined according to customer needs.
3, sealed emergency grease rescue: due to foreign matter in the medium or fire caused by the valve seat accidental failure, the grease valve provides a quick connection with the grease gun, convenient and quick injection of sealing grease into the seat sealing part, to ease leakage .
4, flexible operation: the use of a small friction coefficient and good self-lubricating valve seat and stem bearings, greatly reducing the operating torque of the valve. Therefore, even in the case where the sealing grease is not provided, the valve can be operated flexibly and freely for a long period of time.
5. Reliable stem seal and low operating torque: In addition to the standard sealing ring, the “O†seal is also installed on the packing gland. The double seal ensures the reliability of the stem seal; the added graphite packing and The sealing grease is injected to reduce the valve stem leakage after the fire to a low level. The stem slide bearing and thrust bearing make the valve operation lighter.
Features of pneumatic fixed ball valve 1. Fire safety structure: The valves all have fire safety functions, and their design and manufacture follow API607 and API6FA specifications.
2. Double blocking and discharging function: The pneumatic fixed ball valve adopts a spring preloading floating valve seat. When the valve is in the fully open or fully closed state, the valve seat on the upstream and downstream sides blocks the fluid, and the retentate in the valve body passes through the discharge valve. excretion.
3. Automatic pressure relief function: When the valve body cavity stays in the medium temperature and causes abnormal pressure rise, it does not need to pass the safety valve, but the valve seat function can automatically release pressure, which ensures the safety of the valve when conveying liquid medium. Sex is very important.
Pneumatic fixed ball valve is a new generation of high performance ball valve, suitable for long-distance pipelines and general industrial pipelines. Its strength, safety and harsh environment are specially designed for various corrosive and non-corrosive media. . Compared with the floating ball valve, when working, the force generated by the pre-valve fluid pressure on the ball is transmitted to the bearing, and the ball is not moved to the valve seat, so the valve seat does not withstand excessive pressure, so the fixed ball valve The torque is small, the valve seat deformation is small, the sealing performance is stable, and the service life is long, which is suitable for high pressure and large diameter occasions. Advanced spring pre-seat assembly with self-tightening for upstream sealing. Each valve has two seats that seal in each direction, so the installation has no flow restriction and is bidirectional. This valve is generally installed horizontally.
Pneumatic fixed ball valve has two-piece and three-piece valve body structure, the middle flange is bolted, the seal is made of reinforced PTFE embedded in the stainless steel ring, and the spring at the rear of the steel ring ensures that the valve seat is close to the ball. Keep it sealed. Both the upper and lower stems have PTFE bearings to reduce friction and save effort. The bottom of the small shaft has adjustment tabs to ensure the position of the ball and the seal.
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