| 137 / | HD | FLUID HANDLING |
| 154 | DF | DIVERSE FLUID CONTAINING PRESSURE SYSTEMS {7} |
| 171 | DF | .~ Fluid separating traps or vents {5} |
| 197 | DF | .~.~ Discriminating outlet for gas {2} |
| 199 | DF | .~.~.~ Fluid sensing valve {2} |
| 200 | ![]() | .~.~.~.~ With vaporized liquid stop {1} |
| 201 | DF | .~.~.~.~.~> With separate return for condensate |