Bellows sealing ball valve introduction

◇ Bellows seal document.write('') ​​Ball valve document.write('') ​​Overview
Bellows seal document.write('') ​​Ball valve document.write('') ​​is mainly used in the harsh occasions of flammable, explosive and toxic conditions, through the double action of packing and bellows to achieve the stem seal, to reach the valve and Zero leakage from the outside world. Since the bellows can only withstand the tension and compression force, it is only suitable for the valve for linear lifting movement during the opening and closing process, so the bellows valve is generally limited to the document.write('') ​​stop valve document.write('' ) or document.write('') ​​gate valve document.write('') ​​. In order to make the principle of bellows sealing to a wider range of applications, the bellows seal document.write('') ​​ball valve document.write('') ​​was developed.

波纹 Bellows seal document.write('') ​​ball valve document.write('') ​​structure
Bellows seal document.write('') ​​The ball valve document.write('') ​​consists mainly of the valve body, upper stem, stem, bellows, lower stem and pin. A pair of spiral track grooves are opened on the upper and lower valve stems (the same spiral direction), the two pins are fixed on the valve stem and the pin can move freely in the track grooves of the upper and lower valve stems. The lower stem and the ball are connected to control the opening and closing of the valve.

◇ Bellows seal document.write('') ​​Ball valve document.write('') ​​How it works
When the upper stem rotates, the pin mounted on the stem has a tendency to rotate, but the lower helical groove of the stem and the upper helical groove have the same direction of rotation, and the force applied to the opposite direction tends to hinder its movement. According to the principle of balance of force, the valve stem will be analyzed, and the valve stem will only move up and down under the action of the spiral groove. Since the bellows is welded to the valve stem, the lifting of the valve stem ensures the safety of the bellows.

◇ Bellows seal document.write('') ​​Ball valve document.write('') ​​Conclusion
The bellows seal document.write('') ​​ball valve document.write('') ​​is a relatively new structure that effectively solves the bellows in the document.write('') ​​ball valve document.write('') ​​seal The problem of rotation in the process utilizes two spiral grooves of the same direction to make the external force undergo three transformations in the process of transmission. The two spiral grooves are the same in rotation direction, easy to process, and do not need to be configured during assembly, which effectively meets the requirements of modern valve processing, simple assembly, reliable operation and safe operation.