Dungs Gas Multibloc MB-ZRDLE 405 B01 S50 with 360 MBAR Inlet Pressure (RP 1/2 - RP 2)

Product Details

The DUNGS MB-ZRDLE is a high-performance GasMultiBloc designed specifically for two-stage (dual-load) burner operation. It integrates a filter, pressure regulator, and two safety shut-off valves into a single, compact. The "ZR" designation is the core differentiator, allowing the burner to cycle between a Partial Load (Stage 1) and a Full Load (Stage 2). 1. Model Breakdown & Nomenclature Each part of the model name specifies a critical function: MB: MultiBloc (The integrated assembly). ZR: Two-stage operation (Partial and Main gas volumes). D: Main volume restrictor (Throttles total flow). LE: Slow-opening (Adjustable ramp with a hydraulic brake for soft starts). 2. Series Model List & Specifications The size of the MB-ZRDLE is selected based on the required flow rate and pipe diameter. Model Connection Range (Rp) Max. Inlet Pressure Output Pressure Range (S20) Max. Flow (m3/h Air) MB-ZRDLE 405 1/2" – 3/4" 360 mbar 4 – 20 mbar ~15 MB-ZRDLE 407 1/2" – 3/4" 360 mbar 4 – 20 mbar ~25 MB-ZRDLE 410 3/4" – 1 1/4" 360 mbar 4 – 20 mbar ~35 MB-ZRDLE 412 3/4" – 1 1/4" 360 mbar 4 – 20 mbar ~50 MB-ZRDLE 415 1" – 2" 360 mbar 4 – 50 mbar ~75 MB-ZRDLE 420 1" – 2" 360 mbar 4 – 50 mbar ~100 3. Integrated Components Inside the block, the gas passes through several stages: Fine-Mesh Sieve: A 0.8 mm internal filter protects the regulator and valve seats. Pressure Regulator: A spring-loaded unit that maintains constant burner manifold pressure. Valve 1 (V1): A fast-opening/fast-closing safety valve (Class A). Valve 2 (V2): A slow-opening/fast-closing safety valve that handles the two-stage modulation. 4. Adjustments & Commissioning The MB-ZRDLE features four primary adjustment points that must be tuned for the specific burner: Output Pressure: Adjusted via the regulator screw to set the base gas pressure. Stage 1 (Partial Volume): Located on the V2 solenoid head. It sets the "Low Fire" volume. Stage 2 (Main Volume): The large knob on top of V2 sets the "High Fire" or maximum capacity. Fast Stroke (Initial Lift): Adjusted via an internal screw under the small cap on the hydraulic brake. This provides the initial "jump" of gas for ignition. 5. Technical Data (Standard) Opening Time: Adjustable from 0 to 20 seconds. Closing Time: < 1 second. Protection Rating: IP54 (Splash-proof). Ambient Temperature: -15 °C to +70 °C. Voltage: 230V AC (Standard), 120V AC, or 24V DC. Duty Cycle: 100% (Continuous operation). 6. Common Accessories Flange Kits: The valves are "flangeless." You must buy Rp or NPT flanges separately to match your pipe size. VPS 504: An automatic Valve Proving System that bolts to the side to check for seat leakage. GW A5/A6: Gas pressure switches that monitor for low or high gas pressure conditions.