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What causes pneumatic ball valve damage? How to prevent?


Release time:

2022-09-29

Wuxi Xinming automatic control valve industry Co., Ltd. today to introduce to you the causes of damage to the pneumatic ball valve? Pneumatic ball valve is widely used in the field of coal chemical equipment gasification. Due to the use of working conditions containing solid particles, ash, sulfur and other special media, it should meet the requirements of wear resistance, corrosion resistance, erosion resistance, anti scaling and scarring, rapid opening and closing, frequent action, etc., together with good sealing, improve the efficiency of the equipment, make it low energy consumption and safe and reliable operation. 1. Cause analysis of leakage of pneumatic ball valve After a period of time, the valve is not switched in place and jammed. The valve is severely washed and the sealing surface is damaged. If it is more severe, the ball and parts in the valve cavity are damaged, resulting in internal leakage of the valve. The gap between the valve stem and the stuffing box is added, resulting in external leakage of the valve. 1.1 pneumatic ball valve leakage: According to the induction and analysis of various gasification technology, medium and process, the ball valve in key parts is affected by the solid content in the medium, and the valve switching frequency is high together, which is affected by the saving structure of the valve design flow channel, and the pressure difference before and after the valve also increases, resulting in particularly severe flushing and wear of the valve. 1.2 pneumatic ball valve leakage: The unreasonable design of the valve stem packing structure, the over-coaxiality of the ball and valve stem of the valve, the unreasonable selection of valve stem data and other factors cause the valve stem and packing to wear and add during the switching process of the valve stem, and the matching surface of the valve stem and packing is severely worn, resulting in the reduction of the diameter of the valve stem. After all, the medium in the valve flow channel leaks along the axial direction of the valve stem. 2. Improvement measures of pneumatic ball valve Modification of 2.1 and inner seal structure The hard sealing ball valve seat adopts scraping structure design, which makes the ball and valve seat have self-cleaning function in the opening and closing process, which is useful to avoid the deposition and adhesion of particles between the ball and the valve seat, and ensures the smooth connection of the valve action without blocking. Special structural design is selected between the auxiliary valve seat and the valve body and the main and auxiliary valve seats, and metal rings are added between the sealing packing, improving the rigidity and toughness of the packing is further useful to prevent impurities from entering the spring cavity behind the valve seat and ensure the long-term useful work of the spring. Structural Modification of 2.2 Outer Seal The upper and lower end faces of the valve stem are positioned with bearings. The valve stem plays a relative rotation and plays a guiding role to ensure the coaxiality requirements of the valve stem and the ball. The upper part of the packing is a disc-shaped tension spring to ensure the sealing performance of the packing. The pre-tightening force is designed as a live load mode, and the sealing effect is better, which can ensure the service life of the sealing data. 2.3 selection of new technology, new information: According to different working conditions, the valve ball can be selected ceramic metal composite sphere or surface spraying tungsten carbide, zirconium carbide and other information. Through the above improvement of the internal and external sealing structure, the valve sealing surface abrasion resistance and packing sealing function are improved, and the service life of the equipment is extended. The sealing structure of the pneumatic ball valve is relatively reasonable and meets the requirements of the working conditions. The above is about the causes of pneumatic ball valve damage and preventive measures related content, assuming that you have demand for our company's products, welcome to contact online customer service for detailed inquiries, quotations and other information, also welcome to our company inquiries, invited to cooperate with you!

What causes pneumatic ball valve damage? How to prevent?

Wuxi Xinming automatic control valve industry co., ltd. introduces you todayPneumatic ball valveWhat are the causes of damage and how to prevent it?

气动球阀

Pneumatic ball valveIn the field of coal chemical equipment gasification is widely used, due to the use of working conditions containing solid particles, ash, sulfur and other special media, should meet the wear resistance, corrosion resistance, erosion resistance, anti scaling and scarring, rapid opening and closing, frequent action and other requirements, together with good sealing, improve the efficiency of the equipment, so that low energy consumption and safe and reliable operation.
1. Cause analysis of leakage of pneumatic ball valve
After a period of time, the valve is not switched in place and jammed. The valve is severely washed and the sealing surface is damaged. If it is more severe, the ball and parts in the valve cavity are damaged, resulting in internal leakage of the valve. The gap between the valve stem and the stuffing box is added, resulting in external leakage of the valve.
1.1 pneumatic ball valve leakage:
According to the induction and analysis of various gasification technology, medium and process, the ball valve in key parts is affected by the solid content in the medium, and the valve switching frequency is high together, which is affected by the saving structure of the valve design flow channel, and the pressure difference before and after the valve also increases, resulting in particularly severe flushing and wear of the valve.
1.2 pneumatic ball valve leakage:
The unreasonable design of the valve stem packing structure, the over-coaxiality of the ball and valve stem of the valve, the unreasonable selection of valve stem data and other factors cause the valve stem and packing to wear and add during the switching process of the valve stem, and the matching surface of the valve stem and packing is severely worn, resulting in the reduction of the diameter of the valve stem. After all, the medium in the valve flow channel leaks along the axial direction of the valve stem.





2. Improvement measures of pneumatic ball valve
Modification of 2.1 and inner seal structure
The hard sealing ball valve seat adopts scraping structure design, which makes the ball and valve seat have self-cleaning function in the opening and closing process, which is useful to avoid the deposition and adhesion of particles between the ball and the valve seat, and ensures the smooth connection of the valve action without blocking. Special structural design is selected between the auxiliary valve seat and the valve body and the main and auxiliary valve seats, and metal rings are added between the sealing packing, improving the rigidity and toughness of the packing is further useful to prevent impurities from entering the spring cavity behind the valve seat and ensure the long-term useful work of the spring.
Structural Modification of 2.2 Outer Seal
The upper and lower end faces of the valve stem are positioned with bearings. The valve stem plays a relative rotation and plays a guiding role to ensure the coaxiality requirements of the valve stem and the ball. The upper part of the packing is a disc-shaped tension spring to ensure the sealing performance of the packing. The pre-tightening force is designed as a live load mode, and the sealing effect is better, which can ensure the service life of the sealing data.
2.3 selection of new technology, new information:
According to different working conditions, the valve ball can be selected ceramic metal composite sphere or surface spraying tungsten carbide, zirconium carbide and other information.
Through the above improvement of the internal and external sealing structure, the valve sealing surface abrasion resistance and packing sealing function are improved, and the service life of the equipment is extended. The sealing structure of the pneumatic ball valve is relatively reasonable and meets the requirements of the working conditions.






气动球阀

The above is about the causes of pneumatic ball valve damage and preventive measures related content, assuming that you have demand for our company's products, welcome to contact online customer service for detailed inquiries, quotations and other information, also welcome to our company inquiries, invited to cooperate with you!