How to classify electric stainless steel ball valves according to their structure?

Electric stainless steel ball valve is also a branch of stainless steel valve because the material is stainless steel. Electric stainless steel ball valve has many functions, wide application range and strong adaptability. Because stainless steel material is corrosion-resistant and wear-resistant, it is very popular. I also think that the classification of electric stainless steel ball valves is more detailed, so it is not difficult for many manufacturers to choose the electric stainless steel ball valve that suits them, so it is a big step in efficiency.

Electric stainless steel ball valves are divided into floating ball valves, fixed ball valves, and elastic ball valves according to their structure. These three electric stainless steel ball valves have certain differences. For details, please refer to the corresponding concepts for your own analysis:

The ball of the floating ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure the seal of the outlet end. The floating ball valve has a simple structure and good sealing performance, but the load of the sphere bearing the working medium is all transmitted to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the sphere medium. This structure is mostly used for medium and low pressure ball valves.

The ball of the fixed ball valve is fixed and does not move after being pressed. The fixed ball valve has a floating valve seat. After receiving the pressure of the medium, the valve seat will move, so that the sealing ring is pressed tightly on the ball to ensure sealing. Bearings are usually installed on the upper and lower shafts of the sphere, and the operating torque is small, which is suitable for high-pressure and large-diameter valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, the oil-sealed ball valve appeared, which not only injects a special lubricant between the sealing surfaces to form a layer of oil film, which enhances the sealing performance and reduces the operating torque, which is more applicable High-pressure large-diameter ball valve.

The ball of the ball valve is elastic. Both the ball and the valve seat sealing ring are made of metal materials, and the sealing specific pressure is very large. The pressure of the medium itself cannot meet the sealing requirements, and external force must be applied. This valve is suitable for high temperature and high pressure media. The elastic sphere is made by opening an elastic groove on the lower end of the inner wall of the sphere to obtain elasticity. When closing the channel, use the wedge-shaped head of the valve stem to expand the ball and press the valve seat to seal. Loosen the wedge-shaped head before rotating the sphere, and the sphere will return to its original shape, so that there is a small gap between the sphere and the valve seat, which can reduce the friction of the sealing surface and the operating torque.
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