The DUNGS MB-ZRD(LE) 415–420 B01 MultiBloc is engineered for two-stage burner applications requiring precise gas flow control and dependable safety performance. By combining filtration, pressure regulation, pressure monitoring, and automatic shut-off functions into one compact unit, the system simplifies installation while improving burner efficiency.

Available in DN40 and DN50 sizes, the MB-ZRD(LE) 415–420 B01 is ideal for high-capacity gas burners used in boilers, furnaces, and industrial heating systems. The two-stage functionality enables low-fire and high-fire burner operation, improving combustion stability and reducing fuel consumption.

The system supports VPS 504 valve proving systems and KO1/1 closed-position signal contacts for enhanced burner safety monitoring.

Key Features

• Integrated two-stage gas control system

• High-capacity gas flow handling

• Built-in microfilter with sieve

• Adjustable gas pressure regulator

• Optional gas pressure switch

• Dual automatic safety shut-off valves

• Compact MultiBloc construction

• Reliable low-fire and high-fire operation

• Improved combustion efficiency

• VPS 504 valve proving system compatible

• KO1/1 closed position signal contact compatible

• Easy installation and maintenance

Applications

• Industrial Gas Burners

• Commercial Gas Burners

• Steam Boilers

• Hot Water Boilers

• Industrial Furnaces

• Thermal Oil Heaters

• Process Heating Equipment

• Drying Systems

• Combustion Systems

• OEM Burner Manufacturing

Why Choose DUNGS MB-ZRD(LE) 415–420 B01?

• Designed for high-capacity burner applications

• Reliable two-stage combustion control

• Combines multiple gas train functions into one unit

• Reduces installation space and piping

• Improves burner efficiency and flame stability

• Provides accurate gas pressure regulation

• Enhances operational safety

• Trusted DUNGS gas control technology

Technical Description

The MB-ZRD(LE) 415–420 B01 MultiBloc integrates all essential gas train components into a single assembly for two-stage burner operation.

The system includes:

• V1 = Valve 1

• V2 = Valve 2

• Filter (3)

• Optional Pressure Switch (4)

• Pressure Regulator (5)

The unit supports outlet pressure ranges of 4–20 mbar and 4–50 mbar with inlet pressures up to 200 mbar. Depending on the burner configuration, valves may operate together or separately to provide low-fire and high-fire burner control.

For high-capacity applications, the internal filter element can be removed and an external DUNGS GF gas filter installed upstream.

Technical Specifications

Available Models

Main Components

Available Versions