The DUNGS MB-D(LE) 405–412 B01 MultiBloc combines multiple gas train components into a compact and efficient gas control unit. By integrating filtration, pressure monitoring, pressure regulation, and automatic safety shut-off valves, the MultiBloc reduces installation complexity while improving burner reliability and safety.
Available in DN15, DN20, DN25, and DN32 sizes, the MB-D(LE) 405–412 B01 series is suitable for a wide range of industrial and commercial burner applications. Depending on the model, the system includes single-seat or double-seat valve technology to meet various combustion requirements.
The unit can be supplied with adjustable opening behavior (LE), main flow restriction (D), or both functions combined (DLE), allowing precise control of burner startup and gas flow.
Key Features
Integrated gas train solution
One-stage gas control operation
Built-in microfilter with sieve
Integrated gas pressure switch
Adjustable pressure regulator
Dual automatic safety shut-off valves
Compact design reduces installation space
Precise gas pressure control
Reliable burner safety protection
VPS 504 valve proving system compatible
Easy installation and maintenance
Suitable for industrial and commercial burners
Applications
Industrial Gas Burners
Commercial Gas Burners
Steam Boilers
Hot Air Generators
Industrial Furnaces
Process Heating Equipment
Thermal Oil Heaters
Drying Systems
Combustion Systems
OEM Burner Manufacturing
Why Choose DUNGS MB-D(LE) 405–412 B01?
Combines multiple gas train components into one compact unit
Reduces installation time and piping requirements
Improves burner safety and operational reliability
Provides accurate gas pressure regulation
Supports efficient combustion performance
Available in multiple connection sizes
Trusted DUNGS gas control technology
Suitable for demanding industrial applications
Technical Description
The MB-D(LE) 405–412 B01 MultiBloc integrates a gas filter, pressure switch, regulator, and safety shut-off valves into a single assembly designed for one-stage burner operation.
The system includes:
V1 = Double-seat safety valve
V2 = Single-seat or double-seat safety valve depending on model
Integrated microfilter
Gas pressure switch
Adjustable pressure regulator
The series supports inlet pressures up to 200 mbar and outlet pressure ranges of 4–20 mbar or 4–50 mbar. Models are available with common or separate control of valves V1 and V2.
The unit can also be equipped with a DUNGS VPS 504 Valve Proving System for enhanced safety monitoring.
Technical Specifications
Specification | Details |
|---|---|
Brand | DUNGS |
Series | MB-D(LE) 405–412 B01 |
Product Type | Gas MultiBloc |
Function | One-Stage Gas Control |
Nominal Sizes | DN15, DN20, DN25, DN32 |
Maximum Inlet Pressure | Up to 200 mbar |
Outlet Pressure Range | 4–20 mbar / 4–50 mbar |
Filter | Integrated Microfilter |
Pressure Switch | Integrated |
Pressure Regulator | Integrated |
Valve Proving System | VPS 504 Compatible |
Available Models
Model | Nominal Size | Valve Configuration |
MB-D(LE) 405 B01 | DN15 | V2 Single-Seat Valve |
MB-D(LE) 407 B01 | DN20 | V2 Double-Seat Valve |
MB-D(LE) 410 B01 | DN25 | V2 Single-Seat Valve |
MB-D(LE) 412 B01 | DN32 | V2 Double-Seat Valve |
Main Components
Component | Function |
Filter (3) | Removes contaminants from gas flow |
Pressure Switch (4) | Monitors gas pressure |
Regulator (5) | Controls outlet gas pressure |
Valve V1 | Double-seat safety shut-off valve |
Valve V2 | Single-seat or double-seat safety shut-off valve |
Available Versions
Version | Description |
MB | Standard MultiBloc |
MB-D | Main Volume Restrictor |
MB-LE | Adjustable Opening Behaviour |
MB-DLE | Combination of D and LE Functions |
