What are the causes of internal leakage in valves? What is the solution?

1. Selection issues 2. Quality problems with the valves 3. Gate valves or ball valves being used to regulate flow, resulting in damage to the sealing surfaces due to erosion 4. Improper operation (excessive force when opening and closing), leading to damage to the seals. That’s all I can think of; the solution lies in addressing these issues appropriately

Internal or external leakage in valves generally needs to be considered from two aspects. As mentioned above, it should be analyzed from the following perspectives: 1. Whether the valve’s sealing components are damaged – whether it is due to wear of the sealing rings or an issue with the valve selection； 2. If it is a valve selection issue: the product quality or the valve itself is not suitable for the operating conditions of that process section. Generally, it falls into one of the two situations mentioned above. In situation 1, it’s sufficient to carry out the decomposition and then get in touch with the manufacturer; this should resolve the issue. In situation 2, it’s necessary to have a detailed discussion with the supplier about the situation.

1. The pipeline was not cleaned properly during purging, leaving impurities behind. 2. The medium contains impurities. 3. The sealing surfaces are damaged. 4. Incorrect installation. 5. Problems with the selection of the valve. 6. Some special valves were not used in accordance with the instructions

There are two issues related to internal leakage: 1. The valve isn’t closed properly, and 2. The sealing material is severely worn – that’s all there is to it. To determine whether the valve is closed properly, I first need to know if it’s a manual valve or a control valve. As for checking whether the sealing material is severely worn, all you need to do is remove the valve and inspect the sealing ring. QQ: 928976489 (Your control valve consultant)_

There are many reasons for internal leakage in valves, mainly including internal factors (wrong selection, poor quality, unreasonable design, substandard sealing materials, etc.) and external factors (severe operating conditions, incorrect opening and closing, scratches during installation, rough or improper handling, etc.). If it’s not a real seal damage. Internal leakage can be resolved simply by tightening and adjusting the valve. If it is a genuine seal damage, the best solution is of course to stop the machine, replace the seal or the valve. If it cannot be stopped/ceased, repair must be carried out online while under pressure; there is a certain success rate for such repairs, and even professional teams cannot guarantee a 100% successful fix. In companies with advanced technology, once online repair is successful, the valves can be opened and closed freely, and their functional performance returns to its original state. If you want relevant information, please send me a message within the platform so we can all improve together.