Ultra-low temperature top-mounted fixed ball valve is a new generation of high-performance ball valve, which is suitable for long-distance pipelines and general industrial pipelines. Corrosive and non-corrosive media. Compared with the floating ball valve, Ultra-low temperature top-mounted fixed ball valve, when working, the force generated by the fluid pressure in front of the valve on the ball is completely transmitted to the bearing, which will not make the ball move to the valve seat, so 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 occasions. Advanced spring pre-seat assembly with self-tightening characteristics to achieve upstream sealing. Each valve has two valve seats, which can be sealed in each direction, so there is no restriction on the flow direction of the installation, and it is two-way.

Ultra-low temperature top-mounted fixed ball valve has two body structures, two-piece type and three-piece type. The middle flange is connected by bolts, and the seal is made of reinforced polytetrafluoroethylene embedded in the stainless steel ring. There is no spring at the rear of the steel ring. Make sure that the seat fits tightly against the ball to maintain a tight seal. There are no PTFE bearings on the upper and lower valve stems to reduce friction and save labor. There is no adjustment piece at the bottom of the small shaft to ensure the joint position of the ball and the sealing ring. Full bore: The flow hole diameter of the valve is consistent with the inner diameter of the pipeline to facilitate pipeline cleaning.

1. Labor-saving operation: the ball is supported by upper and lower bearings, which reduces friction and eliminates the excessive torque caused by the huge sealing load formed by the inlet pressure pushing the ball and the sealing seat.
2. Reliable sealing performance: PTFE monolithic material sealing ring is embedded in the stainless steel valve seat, and the end of the metal valve seat is equipped with a spring to ensure sufficient pre-tightening force of the sealing ring. When the sealing surface of the valve is worn during use, under the action of the spring The valve continues to ensure good sealing performance.
3. Fireproof structure: In order to prevent the PTFE sealing ring from being burned due to sudden heat or fire, large leakage occurs, and the fire is fueled, a fireproof sealing ring is set between the ball and the valve seat. When the sealing ring burns, Under the force of the spring, the sealing ring of the valve seat is quickly pushed to the sphere to form a metal-to-metal seal and achieve a certain degree of sealing effect.
4. Automatic pressure relief function: When the pressure of the stagnant medium in the valve cavity rises abnormally and exceeds the pre-tightening force of the spring, the valve seat will retreat from the ball to achieve the effect of automatic pressure relief, and the valve seat will automatically reset after pressure relief.
5. Discharge pipeline: The valve body is equipped with discharge larvae L above and below, which can check whether the valve seat leaks. During work, when the valve is fully open or fully closed, the pressure in the middle cavity can be removed, and the packing can be directly replaced; the medium can be discharged. Cavity retentate, reduce medium pollution to the valve. Auxiliary seal setting system (please specify when ordering)
6. The valve is designed with an auxiliary seat emergency sealing system. Once the seal is damaged or emerges in an emergency and cannot be sealed, the sealing surface can be repaired by injecting the corresponding sealant into the sealing surface through the auxiliary sealing system to achieve emergency sealing. . When the conveyed medium is dirty or contains a small amount of particles, in order to protect the sealing surface and ensure a reliable seal, the device can also be injected with a corresponding cleaning agent or lubricant to clean the sealing surface.
7. Ultra-low temperature top-mounted fixed ball valve is widely used in the cutting or circulation of transportation pipeline media such as food, medicine, petroleum, chemical industry, natural gas, steel, environmental protection, and papermaking. This device can also be injected with corresponding cleaning agent or lubricant to clean the sealing surface.