Safety valves serve to blow out non-poisonous and nonflammable gases into the atmosphere in order to protect pressure tanks against overpressure.
Please note: Only safety valves that have been set and sealed with lead (plumbed) by us can be delivered with the component symbols, it is thus absolutely necessary to indicate the setting pressure in bar.
To test their proper functioning, safety valves can be relieved by turning the knurled (thumb) screw to the right. The bearing surfaces and conical seals can be cleaned of impurities by unscrewing the entire upper part – without changing the pressure setting.
Repairs may only be carried out by the manufacturer.
Definitions
| Set pressure = start-to-leak pressure | Beginning of audible leaking | |
| Opening pressure | Valve completely open, maximum blow-off / deflation | |
| Closing pressure | Valve is closed and sealed (tight) | |
| Opening pressure difference | Difference between start-to-leak pressure and opening pressure | |
| Closing pressure difference | Difference between start-to-leak pressure and closing pressure | |
| For example: | Set pressure | 12,0 bar |
| Opening pressure (+10%) | 13,2 bar | |
| Closing pressure (-10% | 10,8 bar | |