Flow meter installation issues
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May I ask, for systems such as nitrogen lines, industrial air, and instrument air, when installing flow meters, is it necessary to install a drain or vent valve between the valves before and after the flow meter on the main line? If necessary, please state the reason~~
What type of flow meter are you installing? Flow meters under normal conditions do not require the installation of an exhaust valve. Only when an orifice plate flow meter is installed do the pressure tapping pipes at the front and back each have a drain port.
No, these gases have very low dew points, so condensation will not occur at all
I don’t know much about this, but I’m quite curious about it. We just can’t get our steam flow meters to work properly
The gas has been dehumidified before being sent out, so there is no need to install systems for condensate drainage and venting
The last edit to this post was made by tqg8888 on 2009-5-10 at 08:20. It can be said that the installation of vent valves behind the inlet and outlet valves on instruments and pipeline equipment is driven by safety considerations. When removing and installing instruments and pipelines, two safety requirements must be met: first, the manual valves before and after the equipment must be closed; second, the pressure must be brought to zero, which requires the installation of a vent valve to achieve. To prevent injury to the body or equipment due to pressure while disassembling.
A vent valve is installed behind the inlet and outlet valves, for safety reasons and practical needs
I just worked at the chemical plant for 3 months; I don’t think it’s really necessary! I don’t quite understand; waiting for someone more knowledgeable