| 137 / | HD | FLUID HANDLING |
| 87.01 | DF | SELF-PROPORTIONING OR CORRELATING SYSTEMS {8} |
| 109 | DF | .~ Self-controlled branched flow systems {4} |
| 115.01 | DF | .~.~ Bypass or relief controlled by main line fluid condition {3} |
| 115.13 | DF | .~.~.~ Pressure responsive {9} |
| 115.26 | ![]() | .~.~.~.~ Sensor rigid with valve {2} |
| 115.27 | DF | .~.~.~.~.~> Flexible sensor |
| 115.28 | DF | .~.~.~.~.~> Pressure responsive outlet valve |