The valve core of the cage type double seat regulating valve is designed based on the principle of fluid dynamic balance. The valve body is a high-strength spherical structure, which has the characteristics of low unbalanced force, good dynamic stability, low pressure drop loss, high regulation accuracy, low noise, and air defense. Compared with the P series straight through single seat regulating valve, it can withstand higher pressure differentials and has a wider operating temperature range than the G series cage type single seat regulating valve. Cage type double seat regulating valves are mainly used in insulation applications. When the crystallization temperature of the process medium is lower than the ambient temperature or the fluid temperature is low, causing an increase in viscosity or solidification of the fluid, insulation jacket devices are added to the regulating valve body and upper valve cover to enable the process to proceed automatically.

The cage type double seat regulating valve is composed of an electric actuator and various valve bodies (single seat, double seat, sleeve), and has the characteristics of various valves. The electric control valve is powered by a single-phase AC 220V power supply and receives a unified standard electrical signal of 0-10mADC or 4-20mADC. It automatically controls the valve opening to achieve automatic control of parameters such as working flow rate, pressure, temperature, and liquid level. It is one of the components of automatic adjustment in the production process. Widely used in automatic control of industries such as power, metallurgy, light industry, food, petroleum, and chemical.

Characteristics of cage type double seat regulating valve:

*Pressure balanced design

*Carefully designed for easy maintenance

*High circulation design

*Anti flash evaporation and cavitation

*The valve body channel has been optimized for better flow stability

*Achieve optimal component universality among all specifications

The daily maintenance work of cage type double seat regulating valve is divided into two parts: patrol inspection and regular maintenance. The patrol inspection work includes the following:

1. Inquire with the on duty process operators about the operation of the regulating valve.

2. Check the supply energy of the regulating valve and related accessories (gas source, hydraulic oil or power supply, etc.)

3. Check the operation of the hydraulic oil system.

4. Check for leaks at the static and dynamic sealing points of the regulating valve.

5. Check whether the connecting pipeline and joints of the regulating valve are loose or corroded.

6. Check for abnormal sounds and significant vibrations in the regulating valve, and inspect the supply situation.

7. Check whether the action of the regulating valve is flexible and whether it changes in a timely manner when the control signal changes

8. Listen for any abnormal vibration or noise from the valve core and seat.

9. Contact and handle any issues promptly upon discovery.

10. Keep records of the patrol inspection and archive them.

The regular maintenance work includes the following:

1. Regularly clean the exterior of the regulating valve.

2. Regularly adjust the packing box and other sealing components of the regulating valve, and replace the sealing components if necessary to maintain the sealing performance of the static and dynamic sealing points.

3. Regularly add lubricating oil to the components that require lubrication.

4. Regularly drain and clean the air source or hydraulic filtration system.

5. Regularly check the connection status and corrosion of each connection point, and replace the connectors if necessary.