This section applies to non-condensing gases.
The objective of this orientation is to ensure that all condensed liquids will drain
back into the process line.
• Locate the flow meter above the line. For vertical lines, locate the flow meter above the orifice plate.
• For horizontal meter runs, use the flange taps located above the center line of the pipe.
• Mount the flow meter and install the three- (or five-) valve manifold so that the flow meter and manifold are self-draining.
• Route the tubing leads between the flow meter and the root valves so that they slope continuously downward toward the root valves and are, therefore, selfdraining.
Ensure that there are no pockets where condensing vapors can get trapped.