| Tipo de boquilla | Boquilla de columna (partes internas de la torre) |
| Manufacturero | BTS Engineering |
| Analógico | MACH Engineering LLC, Christy Catalytics, Pall Ring Company, MTE, Ultimo Engineers, НКС DOLSIN, Munters, AMACS, Koch-Glitsch |
| Tipo de boquilla | Boquilla de columna (partes internas de la torre) |
| Manufacturero | BTS Engineering |
| Analógico | MACH Engineering LLC, Christy Catalytics, Pall Ring Company, MTE, Ultimo Engineers, НКС DOLSIN, Munters, AMACS, Koch-Glitsch |