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Two gas safety shut-off valves are checked for their tightness prior to every
burner start-up or after every shut-down.
Valve Proving Systems for gases according to DVGW-data sheet G 260.
| Versions | AD 2 H 1... | AD 2 H 5... |
| Max. operating pressure | 100 mbarg | 500 mbarg |
| Supply voltage | Standard: 115 V AC, 230 V AC Optional: 24 V DC |
Standard: 115 V AC, 230 V AC Optional: 24 V DC |
| Ambient temperature | - 10 °C to + 60 °C | - 10 °C to + 60 °C |
| Protection rating | IP 54 | IP 54 |
| Setting range | 10 – 100 mbarg | 40 – 500 mbarg |
| Testing time | 1 – 130 s | 1 – 130 s |
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