The process of hard seal butterfly valve overhaul mainly includes the following steps:
OnePreparation:
Close the butterfly valve, stop the flow of media, and drain the medium from the pipe. Ensure that the work area is safe and that you wear personal protective equipment.
IIRemoving the bonnet:
Using a suitable tool, remove the bonnet bolts of the butterfly valve one by one. Take care to maintain the integrity of the sealing surface between the bonnet and the body.
IIIDisassemblyButterfliesPlates:
After removing the bonnet, the butterfly plate can be removed directly. Depending on the need, it may be necessary to disassemble some parts connecting the butterfly plate to the stem in advance.
FourthAccess to valve stems:
After removing the butterfly plate, the stem can be inspected and cleaned. If the stem is severely worn or damaged, it needs to be replaced.
FiveCleaning the seat:
Use appropriate cleaners and tools to clean the seat and seal faces. Make sure that the seat surface is smooth and free of impurities.
SixReplace the seal:
Inspect and replace the seal of the butterfly valve. Make sure that the sealing ring is installed correctly and that a tight seal can be guaranteed.
SevenAssembling valves:
Assemble in reverse order, and install parts such as disc, stem, and seat into the valve body one by one. Take care to make sure that each part is installed correctly and securely.
EightDebugging and testing:
After assembly, the butterfly valve is opened and debugged and tested. Ensure that the opening and closing actions of the valve are normal and the sealing performance is good.
NineClean up and check:
Clean up the work area and remove clutter and tools. A full inspection of the entire butterfly valve is carried out to ensure that there are no loopholes and defects.
XInstallation:
Install the butterfly valve back in place, connect and secure it. Ensure that the installation is secure and reliable, and that it is sealed as needed.
The above is the general process of overhauling Detersen hard seal butterfly valves, and the specific operation steps may vary depending on different types of butterfly valves. Before carrying out any repair and overhaul operations, the operation manual of the relevant equipment should be carefully read and strictly followed by the operating procedures.
Detersen butterfly valve