



Pressure Relief Valves consist of a cylindrical casing with a bottom flange to be connected with a spigot welded on the silo roof, a disc shape inner steel lid for negative pressure operation held in position by a central spring rod, an outside steel ring for excess pressure kept in position by three spring rods, gaskets, and a weather protection cover.


| | SIZE 273 (mm) |
| A | 400 |
| B | 356 |
| C | 125 |
| D | 120 |
| E | 325 |
| φF | 273 |
| NW(kg) | 9.5 |














