Product structural characteristics

The series of fixed ball valves are mainly applicable to industries such as natural gas, oil products, chemical engineering, metallurgy, urban construction, environmental protection, pharmaceuticals, food, etc. Among them, the anti-sulfur series is suitable for natural gas long-distance pipelines with hydrogen sulfide-containing media, high impurity content, and severe corrosion.

Its main structural features are:

1. Shell structure: The valve body of the fixed ball valve can be designed in three forms according to the user's requirements and actual working conditions: casting structure, forging structure, and fully welded structure. Among them, the fully welded structure ball valve is mainly suitable for underground use. 
2. Valve seat sealing structure: For fixed ball valves, the sealing structure is selected based on the pressure level, the nature of the medium, and the sealing requirements. It can be the front seal structure, the rear seal structure, or the dual seal structure at both the front and rear. 
3. Automatic Pressure Relief Structure: When the pressure in the middle chamber abnormally rises, the ball valve with a single-sealed structure has the function of automatic pressure relief, while the ball valve with a double-sealed structure is relieved by the additional pressure relief device on the valve body. 
4. Sealed emergency rescue: When the sealing components of the valve seat and valve stem are damaged and cause leakage, the sealing grease injected through the grease injection valve can provide a temporary sealing effect. 
5. Fireproof Structure: Depending on the working conditions and the user's requirements, the ball valve can be designed as a fireproof structure. The fire-resistant design of the ball valve complies with the provisions of API 607, API 6FA and JB/T 6899, etc. In the event of a fire causing the soft sealing ring to burn out, the fireproof structure of the ball valve can prevent a large amount of medium from leaking and prevent the further expansion of the fire. 
6. Anti-static structure: When operating the valve, due to the friction between the ball and the valve seat, static charges will be generated and accumulate on the ball. To prevent the occurrence of static sparks, an anti-static device is specially installed on the valve to discharge the accumulated charges on the ball. 
7. Blocking and Discharge: When the valve is in the closed position, the valve seats at both the upstream and downstream sides block the flow of fluid. The accumulated substances in the chamber of the valve body can be discharged through the discharge device. 
8. Locking Device: A locking structure is designed at the fully open and fully closed positions of the manual ball valve. This ensures that accidental operation is prevented and unexpected switching phenomena caused by unpredictable line vibrations are avoided. Especially in the production lines of flammable media such as petroleum and chemical substances, as well as when the valve is installed outdoors, this design demonstrates particularly excellent advantages and practical effects. 
9. Full-bore structure and reduced-bore structure: To meet the diverse needs of users, our ball valve products are available in both full-bore and reduced-bore series. The inner diameter of the channel in the full-bore ball valve is consistent with the inner diameter of the pipeline, which is convenient for management and cleaning. While the reduced-bore series ball valves are relatively lightweight in weight, and the fluid resistance is only about 1/7 of that of the same-sized stop valve. Therefore, the application prospects of the reduced-bore series ball valves are more extensive.

Main connection dimensions