Regarding tank flame arresters
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Are there any particular considerations regarding the installation of tank flame arresters at the outlet and inlet of a single-vent valve? When should it be set as an inlet, and when should it be set as an outlet? Is there anything to be aware of?
There are breathing valves that combine breathing function with a flame arrester; just buy the integrated version
Yes, there is an integrated type with a high import flux and a low export flux. However, no manufacturer of such flame arrestor units has conducted any third-party testing on the flame arrestors, making it difficult to assess their reliability.