ORIGINAL DUNGS Multifunctional Gas Solenoid Valve

Technical Description

The DUNGS GasMultiBloc MB-VEF...B01 integrates filter, gas-air ratio controls, valves and pressure switches in one compact fitting:

- Dirt trapMB-VEF 415/420: pre-mount filter (microfilter, sieve)MB-VEF 425: sieve
- Solenoid valves up to 360 mbar as per DIN EN 161 Class A Group 2
- Sensitive adjustment of gas and air pressure ratio
- Servo pressure regulator as per DIN EN 88 Class A Group 2; EN 12067-1
- High flow values at low pressure drop
- Ratio V = pBr / pL0.75 : 1 ... 3 : 1
- Zero point correction N possible

- External pulse lines, pulse flange
- Interference degree N possible
- Flange connections with pipe threads as per ISO 7/1

Functional Description

1. If the valves V1 and V2 are closed, chamber a is under input pressure up to the double seat of valve V1.
2. A hole in the filter housing of MB-...415/420 connects min. pressure switch with chamber a. If the
input pressure applied to the pressure switch exceeds the incoming reference value, it switches through
to the automatic burner control.
3. After release by the automatic burner control, valves V1 and V2 open.The gas flow through chambers
a, b and c of the MultiBloc is then released.