At present, electric butterfly valves are always used in many industries, and will be required in different industries from chemical industry to petroleum industry. Therefore, the installation of electric butterfly valves is also a very important thing. The installation of electric butterfly valves will even affect the service life of electric butterfly valves, The following is a brief introduction to the precautions for the installation of electric butterfly valves.

（3） Application in variable air volume air conditioning system In variable air volume air conditioning system, the outer zone generally adopts variable air volume mode, and the inner zone adopts constant air volume mode. In an air supply system with constantly changing air volume and air pressure, the constant air volume design of the inner zone cannot be separated from the constant air volume valve.