1. According to structural characteristics
2. According to performance characteristics
3. According to the traditional customs, no matter which method is used to classify the electric ball valves, in fact, the products of electric ball valves are various, and will not be increased or decreased because of the different classification methods, just the name has changed.
Electric ball valve, also known as expansion joint and electric ball valve, is mainly used to ensure the safe operation of the pipeline. It has a number of horizontal cylindrical thin-walled folded shells. The pipe is elastic and can produce displacement under the action of pressure, axial force, transverse force or bending moment. The pipe materials shall meet the following conditions: high elastic limit, tensile strength and fatigue strength to ensure the storage work; It has good plasticity to facilitate forming and processing, and can obtain sufficient hardness and strength through subsequent processing (work hardening, heat treatment, etc.);
It has good corrosion resistance to meet the requirements of pipe operation in different environments. The working principle is mainly to use its own elastic deformation function to compensate the axial, angular, lateral and combined displacement of the pipeline due to thermal deformation, mechanical deformation and various mechanical vibrations. The compensation function has the functions of pressure resistance, sealing, corrosion resistance, temperature resistance, impact resistance, vibration reduction and noise reduction, which can reduce the pipeline deformation and improve the service life of the pipeline.
The electric ball valve mainly refers to a spiral pipe, which is a flexible pressure resistant pipe fitting installed in the liquid transportation system to compensate for the mutual displacement of the pipe or the connecting end of the machine and equipment, absorb the vibration energy, and can play the role of vibration reduction and noise reduction. It has good flexibility, light weight, corrosion resistance, fatigue resistance, high and low temperature resistance, flexible pitch, and good scalability, No blocking and rigidity.