Dungs Gas Multiblock DMV-D Series (RP 1/2 - RP 2, 360 MBAR Inlet Pressure, 230V)

Product Details

The DUNGS DMV (Double Modular Valve) series is a highly integrated gas safety component that combines two independent automatic shut-off valves into one compact housing. It is the industry standard for industrial and commercial gas trains because it replaces two separate valves, reducing space, cost, and potential leak points. 1. Model Variants (Nomenclature) The DMV series is defined by the opening behavior of its two internal valves (V1 and V2): DMV-D: Both valves are Fast-opening ($< 1$ s) and Fast-closing ($< 1$ s). DMV-DLE: Valve 1 is Fast-opening; Valve 2 is Slow-opening (approx. 20 s) with an adjustable fast stroke. This is ideal for "soft-start" ignition. DMV-D.../11: The "/11" indicates the latest design generation, featuring improved solenoids and modular mounting points for accessories. 2. Core Specifications & Series Sizes The DMV is a "flangeless" valve body. You must use specific flange kits to match your pipe diameter. Series Size Pipe Size (Rp/NPT) Max Operating Pressure Magnet Type DMV 503 1/2" – 3/4" 500 mbar (7 PSI) 1101 DMV 507 1/2" – 1" 500 mbar (7 PSI) 1111 DMV 512 1" – 1 1/2" 500 mbar (7 PSI) 1211 DMV 520 1" – 2" 500 mbar (7 PSI) 1212 DMV 525 2" (DN 65) 500 mbar (7 PSI) 1212 DMV 5065–5125 DN 65 – DN 125 500 mbar (7 PSI) (High Capacity) 3. Key Functional Features Main Volume Adjustment: On most DMV models, you can manually limit the total gas flow (throttle) by turning the adjustment screw on top of Valve 1. Fast Stroke (DLE only): On slow-opening models, you can set an "initial lift." This allows a burst of gas for ignition, followed by a slow ramp-up to full power. Proof of Closure (POC): Many industrial codes require POC. DMV valves can be fitted with a K01/1 switch that monitors the physical position of the valve seat. Modular Accessories: The valve body features "side taps" (test points) that allow you to bolt on pressure switches (GW A5) or a valve proving system (VPS 504) without extra piping. 4. Technical Data Protection Rating: IP54 (Standard). Voltage: 230V AC, 120V AC, or 24V DC. Duty Cycle: 100% (Continuous operation). Ambient Temperature: -15 °C to +60 °C. Materials: Housing made of aluminum and steel; seals made of NBR (nitrile rubber). 5. Maintenance & Troubleshooting Dirty Sieve: There is an internal 23-mesh sieve at the inlet. If you notice a pressure drop, this sieve likely needs cleaning. Coil Failure: If a valve fails to open, you can replace the solenoid coil without removing the valve body from the gas line. Leakage: If the valve fails a leak test, it usually indicates debris on the valve seat. For safety reasons, seat repairs are generally not field-serviceable; the valve block is typically replaced.