| 165 / | HD | HEAT EXCHANGE |
| FOR 104 | DF | AUTOMATIC CONTROL (165/13) {2} |
| FOR 123 | | .~ Temperature or pressure (165/32) {4} |
| FOR 124 | DF | .~.~> With correlated manual actuation (165/33) |
| FOR 125 | DF | .~.~> Branched flow of exchanging fluid (165/34) {1} |
| FOR 130 | DF | .~.~> Flow of one heat exchanging material controlled by the condition of another (165/37) |
| FOR 131 | DF | .~.~> Flow of heat exchanging material controlled by its own condition (165/40) |