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 resistance to harsh environments have been specially considered in the design, and it is suitable for various corrosive and non corrosive media. Compared with floating ball valves, during operation, all the force generated by the fluid pressure in front of the valve on the ball is transmitted to the bearing, which will not cause the ball to move towards the valve seat. Therefore, the valve seat will not bear excessive pressure, so the torque of the fixed ball valve is small, the deformation of the valve seat is small, the sealing performance is stable, and the service life is long. It is suitable for high-pressure and large-diameter applications. Advanced spring pre seat components with self tightening characteristics achieve upstream sealing. Each valve has two valve seats, which can seal in each direction, so there is no flow restriction during installation, and it is bi-directional. This valve is generally installed horizontally.
The fixed ball valve has two types of valve body structures: two-piece and three piece. The middle flange is connected by bolts, and the seal is made of reinforced polytetrafluoroethylene embedded in a stainless steel ring. The rear of the steel ring is equipped with a spring to ensure that the valve seat is tightly attached to the ball and maintains a seal. Both the upper and lower valve stems are equipped with PTFE bearings to reduce friction and make operation effortless. The bottom of the small shaft is equipped with an adjusting plate to ensure the joint position between the ball and the sealing ring. Full bore: The valve flow aperture is consistent with the inner diameter of the pipeline for pipeline cleaning.

Performance Advantage Editor

1. Effortless operation: The ball is supported by upper and lower bearings, reducing friction and eliminating excessive torque caused by the huge sealing load formed by the inlet pressure pushing the ball and the sealing seat.

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2、 Reliable sealing performance: The PTFE single sex material sealing ring is embedded in the stainless steel valve seat, and the metal valve seat end is equipped with a spring to ensure sufficient pre tightening force of the sealing ring. When the sealing surface of the valve wears out during use, the valve continues to ensure good sealing performance under the action of the spring.

3、 Fireproof structure: In order to prevent the PTFE sealing ring from burning out due to sudden heat or fire, causing significant leakage and fueling the fire, a fireproof sealing ring is installed between the sphere and the valve seat. When the sealing ring burns out, the valve seat sealing ring is quickly pushed onto the sphere by the spring force, forming a metal to metal seal and achieving a certain degree of sealing effect. The fire resistance test meets the requirements of APl6FA and APl607 standards.

4、 Automatic pressure relief function: When the pressure of the stagnant medium in the valve chamber abnormally increases beyond the pre force of the spring, the valve seat retreats and disengages from the sphere, achieving the effect of automatic pressure relief. After pressure relief, the valve seat automatically returns to its original position. Drain pipeline: Drain holes are set on both the upper and lower parts of the valve body to check whether the valve seat is leaking. During operation, when the valve is fully open or fully closed, the pressure in the chamber can be relieved and the packing can be directly replaced; It can discharge the retained substances in the middle chamber and reduce the pollution of the medium to the valve.

Features Editor

Function

1. Double blocking and discharge function: The fixed ball valve adopts a spring preloaded floating valve seat. Regardless of whether the valve is in the fully open or fully closed state, the upstream and downstream valve seats block the fluid, and the trapped material in the valve body cavity is discharged through the discharge valve.

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2、 Automatic pressure relief function: When the temperature of the medium in the valve body cavity rises and causes abnormal pressure rise, there is no need to use a safety valve. The valve seat function alone can automatically relieve pressure, which is very important for ensuring the safety of the valve when transporting liquid media.

3、 Fire safety structure: Valves have fire safety functions, and their design and manufacturing follow the requirements of API 607 and API 6FA specifications.

Advantages

1. Sealing emergency grease injection rescue: Due to foreign objects or fire in the medium causing accidental failure of the valve seat seal, the grease injection valve provides a quick connection with the grease injection gun. The imported pump conveniently and quickly injects the sealing grease into the valve seat sealing area, relieving leakage.

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2、 Reliable stem sealing and low operating torque: In addition to standard sealing rings, O-ring seals are also installed on the packing gland, ensuring the reliability of stem sealing with dual sealing; The addition of graphite packing and sealing grease injection minimizes valve stem leakage after a fire. Valve stem sliding bearings and thrust bearings make valve operation easy.

3、 Full diameter or reduced diameter: Full diameter or reduced diameter structures can be selected as needed. The flow aperture of the full bore valve is consistent with the inner diameter of the pipeline, making it easy to clean the pipeline.

4、 Valve stem can be lengthened: The valve stem can be lengthened according to installation or operation needs. Extended rod ball valves are particularly suitable for applications such as urban gas that require buried pipelines. The size of the extended valve stem shall be determined according to customer requirements.

5、 Flexible operation: The valve seat and stem bearings with low friction coefficient and good self-lubricating properties are used, greatly reducing the operating torque of the valve. Therefore, even without providing sealing grease, the valve can be operated flexibly and freely for a long time.

Application Scope Editor

Fixed ball valves are suitable for various pipelines ranging from Class 150 to Class 1500, PN16 to PN100, and JIS 10K to JIS 20K. They are suitable for temperatures ranging from -196 to 350 ℃ and are used to cut off or connect media in pipelines. Different materials are selected and can be used to transport water, steam, oil products, nitric acid, acetic acid, oxidizing media, urea, etc. They are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, power, municipal engineering, steel and other fields.

. The driving method for fixed ball valves is worm gear transmission, manual, pneumatic or electric. Fixed ball valves are generally connected by flanges, but can also be connected by butt welding.