| 137 / | HD | FLUID HANDLING |
|
| 87.01 | DF | SELF-PROPORTIONING OR CORRELATING SYSTEMS {8} |
| 109 | DF | .~ Self-controlled branched flow systems {4} |
| 118.01 | DF | .~.~ Plural outflows {5} |
| 119.01 |  | .~.~.~ Alternately or successively substituted outflow {7} |
| 120 | DF | .~.~.~.~> Control by filling auxiliary gravitating or float operating tank |
| 121 | DF | .~.~.~.~> Control by filling outlet tank or receiver {1} |
| 119.02 | DF | .~.~.~.~> Four port reversing valve |
| 119.03 | DF | .~.~.~.~> Responsive to pressure or flow interruption {2} |
| 119.06 | DF | .~.~.~.~> Flow rate responsive {1} |
| 119.08 | DF | .~.~.~.~> Pressure responsive {1} |
| 119.1 | DF | .~.~.~.~> Electrical control |