All-welded ball valve in the practical process will be affected by a variety of factors, these factors are directly related to the performance of the ball valve, service life and safety. Here are some of the main influencing factors:

1. Medium conditions

Medium temperature: The medium temperature of the all-welded ball valve is generally between -20 ° C and 150 ° C, beyond this range may affect the sealing performance and material stability of the ball valve.

Medium composition: If the medium contains hard particles, crystals, impurities, etc., it is easy to wear out the fluorine lining or four-fluorine bellows of the spool and seat during the opening and closing process, resulting in leakage.

Medium pressure: All-welded ball valve needs to withstand a certain medium pressure, if the pressure is too high or the fluctuation is too large, it may cause damage to the structure of the ball valve or affect the sealing effect.

2. Material and seal

Sealing material: The quality of sealing material directly affects the sealing performance of the ball valve. If the quality of the sealing material is not strong, it is easy to cause medium leakage.

Body material: Corrosion resistance and strength of the body material are also key factors. Rust or corrosion of the material will reduce the service life and safety of the ball valve.

Spool quality: The overall quality of the spool is determined by the processing technology, and the wear-resistant layer and the uniform thickness of the cloth layer are crucial to the wear resistance and acid and alkali resistance of the spool.

3. Welding and processing

Weld shape and clearance: the weld shape and clearance have a direct impact on the structural strength and tightness of the ball valve. Weld depth and width, as well as residual height, need to be controlled during welding to ensure weld quality.

Welding conditions: Conditions such as welding current, arc voltage and welding speed have important effects on the shape and performance of the weld. Improper welding conditions may lead to weld defects, such as cracks, edge bites, etc.

Processing technology: Ball valve processing technology determines its overall quality and performance. The high quality processing technology can ensure the uniform thickness of the wear-resistant layer of the valve core, improve the wear resistance and acid and alkali resistance of the ball valve.

4. Use and maintenance

Operation mode: The operation mode of the ball valve (manual, pneumatic, electric, etc.) needs to be correctly selected and used to avoid damage or leakage caused by improper operation.

Maintenance: Regularly check the working condition of the ball valve, clean the dirt inside and outside the valve body, check the sealing performance of the seat and the ball, and replace the seal if necessary, which can extend the service life of the ball valve.

Installation position: The ball valve should be installed in a position that is easy to operate and maintain to avoid being affected by external forces. At the same time, the operating device of the ball valve should be convenient to operate, and the rotation of the valve stem is not restricted.

5. Other factors

Power supply pressure: For electric all-welded ball valves, too low power supply pressure may lead to overload operation, affecting the normal operation of the ball valve.

Negative pressure problem: The ball valve should avoid the use of negative pressure in the pipeline, if there is negative pressure, it is easy to cause the fluorine plastic layer in the valve cavity to be sucked out (bulge out), peeling, resulting in the valve opening and closing failure.

In summary, the all-welded ball valve in the practical process is affected by many factors such as media conditions, materials and sealing, welding and processing, use and maintenance, and power supply pressure, negative pressure problems. In order to ensure the normal operation of the ball valve and extend the service life, it is necessary to consider these factors and take appropriate measures.