9.18 NumberOfPortsClassification
| Name | Value | Description |
| FourPortValve | 0 | FourPortValve |
| ThreePortValve | 1 | ThreePortValve |
| TwoPortValve | 2 | TwoPortValve |
| Name | Value | Description |
| FourPortValve | 0 | FourPortValve |
| ThreePortValve | 1 | ThreePortValve |
| TwoPortValve | 2 | TwoPortValve |