Air Pressure Switch

Dungs is a leading manufacturer of pressure switches for gas and air, primarily used in industrial burners and HVAC systems. Their models are categorized by how they connect and what they monitor (overpressure, vacuum, or differential pressure). 1. Model Series Series Type Primary Use Case GW Gas/Air Pressure Switch Standard monitoring of overpressure or gas supply pressure. LGW Differential Pressure Switch Monitors the difference between two points (e.g., across a filter or fan). GGW Differential (Gas/Gas) High-accuracy differential monitoring for gas and air mixtures. NB Low-Pressure Limiter Locks out if pressure falls below the set point (manual reset). ÜB High-Pressure Limiter Locks out if pressure rises above the set point (manual reset). KS "Klima-Set" Specifically designed for ventilation and air conditioning systems. 2. Specifications While specific to the model, these are the typical operating parameters for the Dungs range: Maximum Operating Pressure : Standard models (GW/LGW): 500 mbar to 600mbar. High-pressure models (GW...A4 HP): Up to 2, 5, or 8 bar. Temperature Range: -15 C to +70°C (Some variants rated for lower ambient temps). Protection Class: Typically IP54 as standard, with IP65 available for outdoor/harsh environments. Electrical Connection: 3-pin plug connection (DIN EN 175 301-803) or screw terminals. Materials: Aluminum die-cast housing with NBR rubber diaphragms. 3. Mounting Styles The alphanumeric suffix at the end of a model (e.g., GW 50 A6) tells you how it connects to your system: A2: O-ring flange connection, often used for direct mounting on Dungs Multiblocs or DMV valves. A4: Threaded connection (typically 1/4" NPT or ISO) with a hand-wheel for manual adjustment. A5: Compact version for Multiblocs/DMV valves. A6: Compact version with a 1/4" threaded connection and an integrated test nipple. 4. Setting Ranges The number in the model name indicates the maximum end of the adjustable range in mbar: GW 3: 0.7 to 3 mbar GW 10: 2 to 10 mbar GW 50: 5 to 50 mbar GW 150: 30 to 150 mbar GW 500: 100 to 500mbar Following models are available in this category: · Dungs air pressure switch LGW3A1 · Dungs air pressure switch LGW10A2 · Dungs air pressure switch LGW10A2P · Dungs air pressure switch LGW50A2 · Dungs air pressure switch LGW50A2P · Dungs air pressure switch LGW150A2 · Dungs pressure switch GW3A5 · Dungs pressure switch GW10A5 · Dungs pressure switch GW50A5 · Dungs pressure switch GW150A5 · Dungs pressure switch GW500A5 · Dungs pressure switch GW3A6 · Dungs pressure switch GW10A6 · Dungs pressure switch GW50A6 · Dungs pressure switch GW150A6 · Dungs pressure switch GW500A6 · Dungs pressure switch LGW3A4 · Dungs pressure switch LGW10A4 · Dungs pressure switch LGW50A4 · Dungs pressure switch LGW150A4