What is the evolution of pneumatic ball valves?
Pneumatic ball valve It evolved from the globe valve. It has the same rotation 90 degree lifting action, the difference is that the plug body is a sphere, with a circular through hole or channel through its axis. The ratio between the sphere and the channel opening should be such that when the sphere rotates 90 degrees, all the inlet and outlet points should be spherical to cut off the flow.
Pneumatic ball valve and plug valve is the same type of valve, only its closing part is a ball, the ball around the valve body center line for rotation to open, close a valve.
1. The quick and convenient switch can meet the requirements of quick opening and closing the high-altitude secret passage for the pipeline
Second, the fluid resistance is small, whether it is the full size reducing diameter ball valve is all valves in the fluid resistance is small.
Three, reliable seat sealing, ordinary ball sealing ring are made of tetrafluoroethylene type other plastic better a kind of polymer material, there is a higher demand for sealing places, soft seal is easier to ensure the seal, metal seal, < hard seal > structure can withstand 10Npa, 16Npa, 32Npa high pressure can be subjected to high temperature in daily life 350℃.
Four, reliable stem seal, stem inverted seal structure can be increased with the increase of the medium, when the ball valve open and close the stem only rotation movement, and do not do the lifting movement. Stem packing is not easily broken. The sealing life of the stem is greatly extended.
Five, long service life, pneumatic device in the destructive test of more than 60,000. Because the sealing part of the ball valve is made of ptfe and other materials with good self-lubricity, the friction and wear of the valve stem are small, ensuring the service life of the valve.
The working principle of pneumatic ball valve is to make the valve open or closed by rotating valve. Pneumatic ball valve switch light, small volume, can be made of a large diameter, reliable sealing, simple structure, easy maintenance, sealing surface and sphere often in a closed state, not easy to be medium erosion, widely used in various industries.