Chemical centrifugal pumps are capable of delivering critical liquids. A critical state of liquid tends to vaporize when the temperature rises or the pressure drops. In order to avoid mechanical seals, packing seals, labyrinth seals, and the like from being destroyed by dry friction due to vaporization of the liquid, such chemical pumps must have a structure that sufficiently removes gas generated in the pump. When applying the centrifugal pump, the gate valve is generally installed in the supporting pipeline. The regulating valve is a common flow regulating valve device. Depending on the application and the fluid of the conveyor, a part of the phase failure of the regulating valve will be blocked or If it is stuck, how can we prevent the valve blockage and card in the chemical centrifugal pump pipeline? The following content will be briefly introduced for you and I hope to help you.
1, An? pipeline filter method
The regulating valve for the diameter is especially small in the flow regulating valve, and the throttle valve has a small gap, and there is no slag in the medium. In case of this condition, a filter device is installed on the pipeline in front of the valve to ensure the smooth passage of the medium. The regulating valve with the locator application, the locator is abnormal in operation, and the hydraulic valve block throttle valve block is a common common fault. Therefore, when the locator is in operation, it is necessary to solve the gas source. The general method is to install the gas filter pressure reducing valve on the gas source pipe before the locator.
2. Media erosion method
Using the erosive kinetic energy of the medium itself, it erodes and brings the items that are easy to settle and easy to block, thereby improving the anti-blocking effect of the valve. Commonly used methods are: changing to closed-flow type application; using motion-sensing oil circuit board; placing the throttle valve port to erode the most harmful part. This method should pay special attention to improve the erosion-resistant working capacity of the throttle valve material.
3. External erosion method
For some mediums that are easy to settle and have liquid particles, when the general valve adjustment is used, it is often blocked at the throttle valve port and the guiding position, and the eroded vapor and steam can be externally connected to the bottom plug of the lower valve cover. When the valve is blocked or stuck, the external steam or steam gate valve is opened, and the cleaning operation can only be performed without the regulating valve, so that the valve works normally.
4, directly connected to the angle method
The direct connection is inverted S fluidity, the flow path is complicated, and there are many dead zones in the upper and lower chambers, showing the area for the sedimentation of the medium. The angular connection, the medium is like a 90 °C elbow, the erosion characteristics are good, the dead zone is small, and the design scheme is streamlined. Thus, the application of a direct-connected regulating valve can result in an angled valve application when it is slightly blocked.
5, expand the throttle valve gap method
For example, the liquid particles in the medium or the welds and rust that are eroded in the pipeline can be changed into the throttle valve with large gap of the throttle valve due to the common failures such as blocking and jamming due to the throttle valve opening. - The total area of ​​the throttle valve is the window ventilation, the valve core of the opening type, and the sleeve size. The total area of ​​the throttle valve is concentrated and not spread over the circle. Common faults can be easily removed by plants. If it is a single or double seat valve, the piston pump valve core can be changed to the "V" shape of the valve core, or to the sleeve valve.
6, cleaning method
Welding, rust, slag, etc. in the pipeline at the throttle valve port, the guiding position, and the lower bonnet equalizing the hole wall cause blockage or jamming, causing contusion and scratches on the valve core bevel, the guiding surface, and the protruding surface Cause embossing, etc. This is often the result of new investment in system software and pre-requisite maintenance. It is a common common fault. In this case, it is necessary to unload and carry out the cleaning to remove the slag. If the surface is damaged, it should be ground. Open the bottom plug together to wash away the slag falling from the equalization hole into the lower bonnet and carry out the pipeline. Cleaning. Before the application, let the regulating valve open, and the media fluidity will be included in all normal operations after a period of time.
1, An? pipeline filter method
The regulating valve for the diameter is especially small in the flow regulating valve, and the throttle valve has a small gap, and there is no slag in the medium. In case of this condition, a filter device is installed on the pipeline in front of the valve to ensure the smooth passage of the medium. The regulating valve with the locator application, the locator is abnormal in operation, and the hydraulic valve block throttle valve block is a common common fault. Therefore, when the locator is in operation, it is necessary to solve the gas source. The general method is to install the gas filter pressure reducing valve on the gas source pipe before the locator.
2. Media erosion method
Using the erosive kinetic energy of the medium itself, it erodes and brings the items that are easy to settle and easy to block, thereby improving the anti-blocking effect of the valve. Commonly used methods are: changing to closed-flow type application; using motion-sensing oil circuit board; placing the throttle valve port to erode the most harmful part. This method should pay special attention to improve the erosion-resistant working capacity of the throttle valve material.
3. External erosion method
For some mediums that are easy to settle and have liquid particles, when the general valve adjustment is used, it is often blocked at the throttle valve port and the guiding position, and the eroded vapor and steam can be externally connected to the bottom plug of the lower valve cover. When the valve is blocked or stuck, the external steam or steam gate valve is opened, and the cleaning operation can only be performed without the regulating valve, so that the valve works normally.
4, directly connected to the angle method
The direct connection is inverted S fluidity, the flow path is complicated, and there are many dead zones in the upper and lower chambers, showing the area for the sedimentation of the medium. The angular connection, the medium is like a 90 °C elbow, the erosion characteristics are good, the dead zone is small, and the design scheme is streamlined. Thus, the application of a direct-connected regulating valve can result in an angled valve application when it is slightly blocked.
5, expand the throttle valve gap method
For example, the liquid particles in the medium or the welds and rust that are eroded in the pipeline can be changed into the throttle valve with large gap of the throttle valve due to the common failures such as blocking and jamming due to the throttle valve opening. - The total area of ​​the throttle valve is the window ventilation, the valve core of the opening type, and the sleeve size. The total area of ​​the throttle valve is concentrated and not spread over the circle. Common faults can be easily removed by plants. If it is a single or double seat valve, the piston pump valve core can be changed to the "V" shape of the valve core, or to the sleeve valve.
6, cleaning method
Welding, rust, slag, etc. in the pipeline at the throttle valve port, the guiding position, and the lower bonnet equalizing the hole wall cause blockage or jamming, causing contusion and scratches on the valve core bevel, the guiding surface, and the protruding surface Cause embossing, etc. This is often the result of new investment in system software and pre-requisite maintenance. It is a common common fault. In this case, it is necessary to unload and carry out the cleaning to remove the slag. If the surface is damaged, it should be ground. Open the bottom plug together to wash away the slag falling from the equalization hole into the lower bonnet and carry out the pipeline. Cleaning. Before the application, let the regulating valve open, and the media fluidity will be included in all normal operations after a period of time.
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