Backward installation of valves in the CO2 stripping process
Thread Content
Why are the angle valves at the outlet of the stripping tower and those at the outlet of the high-pressure ammonium methoxide pump in the CO2 stripping process installed in opposite directions?
Reverse the angle valve of the ammonium methoxide pump to prevent backflow and protect the pump
This type of valve is mainly used when sealing the tower during shutdown. Think about it when the tower is sealed for parking, and you’ll understand the direction of the force on the valve.
It is best to install angle valves in accordance with the flow direction, that is, from bottom to top. As for maintaining pressure in the tower or preventing backflow, sealing is achieved through the contact between the linear sealing surface of the valve stem and the valve seat; both correct and reversed installations rely on this seal. If the valve opening is not tight, leakage will occur regardless of the installation orientation. If there are issues during piping, it is also possible to install the valve in reverse, but in cases where angle valves were installed reversely, the manufacturer advised turning them around when conducting follow-up checks. Personal opinions are for reference only.
Reply to 4# Xishui: Our valves are installed in the reverse orientation. When the people from the design institute came to the site for inspection, they paid special attention to whether these valves were installed reversely; it is required that they be installed that way. I asked him why, and his answer was that it was designed that way when this particular process package was developed – it’s part of someone else’s patent
Replying to the person above: Due to issues with the piping layout, the valves were first installed in reverse order; after operating them for a while, they were switched back to the orientation specified by the manufacturer. Installing them in reverse order didn’t prevent normal operation, but when installed in the correct direction, the fluid did not wash against the sealing surface of the valve seat. However, since there are requirements from the design team, we should follow those requirements.
It’s about considering the sealing issues for the parking pump and the backup pump
Dear teacher, my company mainly produces high-pressure control valves for urea production using the CO2 stripping method, high-pressure manual valves, and high-pressure ammonium injection pumps. I’m not sure which type of valve you are referring to that needs to be installed in reverse; I’m glad to be able to share information and communicate with you! Zeng: 13881910902 QQ: 408659220
Dear teacher, my company mainly produces high-pressure control valves for urea production using the CO2 stripping method, high-pressure manual valves, and high-pressure ammonium injection pumps. I’m not sure which type of valve you are referring to that needs to be installed in reverse; I’m glad to be able to share information and communicate with you! Zeng: 13881910902 QQ: 408659220