Why Dungs introduced MBE / MBE-S
The new MBE (GasMultiBloc®) family is the next generation of Dungs multifunctional gas controls. It replaces older dual-valve and single-valve products (Flanged DMV and MVD ranges) and brings:
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A modular, three-component concept (ValveBody + ValveDrive + PressureSensor) for simpler servicing and lower stock complexity.
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Improved flow performance and reduced pressure drop, allowing smaller valves or lower upstream pressures in some applications.
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Unified voltages (100–240 VAC & 24 V DC options) and plug-and-play valve drives with LED status/POC options.
In short, Dungs designed the MBE family to be lighter, more serviceable, more efficient and easier to specify worldwide.
Which old families are affected?
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DMV (Dual Modular Valves) → being superseded by MBE (double-actuated GasMultiBloc®). Dungs have explicitly signalled the DMV phase-out and direct transition to MBE.
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MVD (single-valve safety shutoffs) → being replaced by MBE-S (single actuated, same MBE design philosophy).
Distributors and Dungs communications/announcements indicate DMV production/end-of-life schedules and recommend migrating to MBE.
Key technical differences (quick table)
| Topic | DMV / MVD (older) | MBE / MBE-S (new) |
|---|---|---|
| Architecture | Modular but fixed electromagnet-based coils and bodies | ValveBody + electronic ValveDrive + PressureSensor modular blocks (lighter) |
| Drives | Electromagnets/coils | Electronic ValveDrive (stepper/servo), LED status, visual position indicator, and optional POC switches. |
| Voltages | Multiple discrete coil variants | Universal ranges (100–240 VAC & 24 VDC options) — fewer SKUs. |
| Flow / ΔP | Good | Improved flow & reduced pressure drop — better performance in the same footprint. |
| Serviceability | Coils as spares | Plug & play ValveDrives; replaceable ValveBody/Drive/PressureSensor components. |
| Approvals | EN161 etc. (many variants) | Same global approvals retained; built for worldwide approvals. |
Practical migration guidance (what to check before swapping)
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Identify the exact old valve model (full code on nameplate — e.g. DMV-DLE 702/602). That tells you whether a direct MBE VB body size exists.
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Confirm mechanical connections (flange size) and face-to-face dimensions — most MBE bodies are backwards-compatible for old footprints, but always confirm.
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Voltage & electrical interface — MBE ValveDrives accept wide voltages; that often means replacing multiple legacy coil SKUs with a single drive SKU.
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Functionality match — if the DMV was a double-block with vent-line, confirm you choose the correct MBE variant: MBE (double) vs MBE-S (single) and whether you need a regulating VD-R or simple VD-V (on/off).
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Accessories & POC — check if you require Proof-of-Closure (POC) switches or visual flags; many MBE ValveDrives have them built-in or as options.
Common retrofit scenarios & examples
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Like-for-like swap (DMV → MBE): For most DN sizes, Dungs offers MBE ValveBody equivalents (VB-xx) and ValveDrive (VD-xx) that slide onto the existing pipework. Check Dungs VB model mapping for DN.
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Single valve replacement (MVD → MBE-S): MBE-S combines a single safety valve + electronic drive and can replicate MVD functions while providing pressure-sensing options.
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MBC family functions: If you used MBC for regulation, choose MBE variants with VD-R type drives (regulating) — confirm outlet pressure springs and ranges.
Benefits of Purchasing
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Fewer SKUs — wide voltage range drives reduce coil variations.
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Easier service — swap ValveDrive or ValveBody independently rather than replacing the entire multiblock.
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Future-proofing — Dungs is actively marketing MBE as the forward product line; stock of DMV/MVD will dwindle across distributors.
- Hydrogen & Biogas Compatible — Ready for a diverse range of fuels.
Safety & Commissioning Notes
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Always follow EN standards and local gas codes when replacing safety shut-off valves.
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After retrofit: perform leak test, functional cycle test and valve prove tests (POC) where required. MBE ValveDrives include status LEDs and mechanical indicators to aid commissioning.