In order to effectively utilize globe valves, it is important to not only focus on proper installation and maintenance, but also on the proper operation of the valves. This means training operators on how to use the valves, as well as providing clear instructions and guidelines for usage. Failure to properly operate globe valves could result in malfunction or potential safety hazards.
It is important to maintain consistent and stable force when operating the stop valve. Additionally, when designing parts of the high-pressure globe valve that are subject to impacts during opening and closing, it is crucial to consider that the impact force cannot be equivalent to that of a typical globe valve. Please ensure that the rearranged content is derived from the original text information.
To prevent any loosening or damage, it is advisable to slightly rotate the handwheel in the opposite direction after fully opening the stop valve. This ensures that the threads are securely tightened.
When initially using the pipeline, it is necessary to deal with the presence of dirt inside. To accomplish this, one can slightly open the stop valve and utilize the high-speed flow of the medium to effectively cleanse the system. Once done, the valve should be gently closed to avoid any residue from causing damage to the sealing surface. Following this, the valve can be reopened and the process repeated multiple times, effectively removing any remaining dirt. Only then can the pipeline be put into regular operation.
In the case of a normally open globe valve, there is a possibility of dirt accumulating on the sealing surface. In order to properly close the valve, it is important to ensure that the sealing surface is free from any debris or contaminants. To achieve this, it is necessary to follow a specific procedure to wash and clean the sealing surface before closing the valve officially. This will help to maintain the optimal functionality and performance of the valve.
Immediate assembly of the handwheel and handle is essential in the event of damage or loss. Substituting them with a flexible wrench should be avoided to prevent any harm to the valve stem, ineffectiveness in opening and closing, and potential production accidents.
It is important to note that certain types of media may still be hot after a shut-off valve has been closed. This can cause the valve parts to shrink, potentially leading to slits on the sealing surface. To prevent erosion of the seal, it is crucial for the operator to close the valve again at an appropriate time, before any damage can be done. Flowing through these slits can substantially increase the speed of the medium, making it even more likely to cause problems. Therefore, operators must exercise extreme caution when dealing with media that have been shut off.
When operating a valve, it's important to pay attention to any signs of excessive labor. If the packing is too tight, adjusting it to a looser setting could help. If you notice that the valve stem is crooked, it's best to alert maintenance personnel to address the issue.
Some globe valves can be difficult to open if the closing mechanism becomes heated and expanded while in the closed position. To alleviate this issue, you can try loosening the bonnet thread by 1/2 to 1 turn to reduce the valve stem's stress before attempting to turn the hand wheel. By taking these steps, you can ensure that your valve operates smoothly and effectively for a long time to come.