Description:
It was used in all kinds of ships with the requirements of the rapid opening and closing of watertight gateway use hatch cover.
Technical Data:
| TYPE | SIZE OF CLEAR OPENING | DECR OPENING | INSIDE DIA OF HATCH | OUT DIA OF COVER |
| D | D1 | D2 | D3 | |
| A | 600 | 640 | 670 | 720 |
| 650 | 690 | 720 | 770 | |
| 700 | 740 | 770 | 820 | |
| 750 | 790 | 820 | 870 | |
| 800 | 840 | 870 | 920 |
| THICK OF COVER | HATCH THICK | HIGH | CENTRAL SPACE | WIGHT |
| t | t1 | H | B | kg |
| 12 | 12 | 200 | 473 | 245 |
| 498 | 266 | |||
| 523 | 285 | |||
| 548 | 306 | |||
| 573 | 328 |