Where, how and when i must use double check valves (two check valves in serie)?
I ask it because we are using this configuration in several questionable points. Like liquid level control of equipments, connections in headers and stand by equipments.
At my workplace, we have been installing them in various locations, but it seems we have lost our way a bit.
We are putting doble check valves in drainage points to prevent backflow when the vessel pressure drops below the drainage system’s pressure.
I would like to know where exactly should...
