Dealing with the Failure and Maintenance of the Middle Line Butterfly Valve in Chinese Flange Connection

Dealing with the Failure and Maintenance of the Middle Line Butterfly Valve in Chinese Flange Connection

In industrial production processes, centerline butterfly valves are a common device for controlling the flow and pressure of fluid media. When the centerline butterfly valve connected to the flange malfunctions, maintenance is required. This article will introduce the methods for handling the faults and maintenance of butterfly valves in the middle line of flange connections in China.

1. Fault phenomenon

In the industrial production process, the centerline butterfly valve connected by flanges may experience the following fault phenomena:

-Leakage between valve stem and sealing ring

-Leakage between valve seat and disc

-The valve cannot be opened or closed

-Valve vibration or vibration

2. Diagnose faults

Before dealing with the failure of the centerline butterfly valve connected by the flange, it is first necessary to diagnose the valve and determine the type of fault. Faults can be diagnosed through the following methods:

-Check if the valve operating handle is flexible. If the handle is stuck, it may be due to worn or damaged internal parts of the valve. Further inspection of the condition of the internal parts of the valve is required.

-Check if the valve sealing ring is damaged or worn. If the sealing ring is deformed or damaged, it indicates that the valve may have a leakage problem. The sealing ring needs to be replaced.

-Check the fit between the valve stem and the sealing ring. If there are foreign objects or impurities between the valve stem and the sealing ring, it may cause wear or damage to the sealing ring. Foreign objects or impurities need to be cleaned.

-Check the fit between the valve seat and disc. If there are foreign objects or impurities between the valve seat and the valve disc, it may cause the valve disc to not move normally. Foreign objects or impurities need to be cleaned.

-Check the valve for vibration or vibration issues. If the valve experiences abnormal vibration or shaking, it may be due to loose or damaged internal parts of the valve. The condition of the internal parts of the valve needs to be checked.

3. Maintenance processing

After diagnosing the fault of the centerline butterfly valve connected by the flange, corresponding maintenance measures need to be taken. The specific maintenance steps are as follows:

-Clean the inside of the valve: Disassemble the valve and remove any residue inside. Especially the residue in the valve body cavity and the dirt on components such as the valve disc and sealing ring.

-Replace sealing ring: If the sealing ring is deformed or damaged, a new sealing ring needs to be replaced. Before replacing the sealing ring, the valve operating handle should be checked for flexibility to ensure that the replaced sealing ring fits well with the valve.

-Replace the valve stem sealing gasket: If the fit between the valve stem and the sealing ring is not good, the valve stem sealing gasket needs to be replaced. When replacing the valve stem sealing gasket, attention should be paid to the size and material of the gasket to ensure a good fit with the valve.

-Replace the gasket between the valve seat and disc: If the fit between the valve seat and disc is not good, it is necessary to replace the gasket between the valve seat and disc. When replacing the gasket between the valve seat and disc, attention should be paid to the size and material of the gasket to ensure a good fit with the valve.

-Check the internal parts of the valve: After the repair is completed, the installation of the internal parts of the valve should be carefully checked to ensure that all parts are installed in place and secure.

-Reassembling the valve: After the repair is completed, reassemble the valve in the reverse order of disassembly.

4. Precautions

When dealing with flange connected centerline butterfly valve faults, the following points need to be noted:

-During the maintenance process, attention should be paid to safety to avoid injury or damage to the equipment.

-When replacing sealing rings and other components, products that match the valve should be selected to ensure that the replaced components fit well with the valve.

-When reassembling the valve, it should be strictly carried out in the reverse order of disassembly to ensure the normal operation of the valve.