
| Type | Name | Nominal dia,DN (mm) |
| A | Inside on-off type mushroom vent head | 150~550 |
| B | Outer on-off type mushroom vent head(without bottom flange) | 150~1800 |
| C | Outer on-off type mushroom vent head(with bottom flange) | 150~1800 |
| D | Fixed type mushroom vent head(without hand wheel control) | 150~1800 |
| E | Inside on-off type mushroom vent head | 150~1800 |
| F | Outer side on-off type mushroom vent head | 150~1600 |