Karl Dungs GW 50 A5 Gas Pressure Switch - Precision front view highlighting graduated scale dial (5–50 mbar) and IP54 housing
Authorized distribution via SRE Pte. Ltd. Supplied with genuine Karl Dungs / JATE factory documentation, standards compliance, and lot traceability.
Original Karl Dungs GW 50 A5 Gas Pressure Control Switch (5–50 mbar) for Industrial Gas Burners & Boiler Protection Systems
Original Karl Dungs GW 50 A5 adjustable overpressure switch (5–50 mbar / 0.5–5.0 kPa, Pmax 500 mbar) with calibrated adjustment dial, fine silver SPDT snap-action microswitch, IP54 protection, and direct GasMultiBloc & DMV flange mounting.
Karl Dungs / JATE Engineering & Technical Overview
The Karl Dungs GW 50 A5 is a world-standard, adjustable gas pressure switch engineered specifically for monitoring overpressure thresholds in industrial forced-draught burners, multi-stage boiler combustion trains, and process heating systems. Acting as a critical safeguard against catastrophic pressure drops or overpressure spikes, the GW 50 A5 guarantees fail-safe combustion interlock in accordance with international safety standards.
Engineered with German precision, the switch is directly compatible with Karl Dungs modular GasMultiBloc platforms (MB-D, MB-Z, MB-VEF) and DMV double solenoid safety shutoff valves. It mounts flush via an integrated O-ring sealing interface secured by standard M4 socket-head fasteners, completely eliminating the need for external interconnecting impulse tubing or complex field pipework.
The GW 50 A5 features an integrated, high-visibility adjustment dial with a clear, graduated pressure scale (5 to 50 mbar / 0.5 to 5.0 kPa). Field engineers and technicians can rapidly and precisely set target trip thresholds by hand without requiring an external pressure gauge, differential manometer, or specialized calibration instruments.
Inside the rugged die-cast aluminum base, a precision silicone-free elastomer diaphragm mechanically couples to a high-durability SPDT (single-pole double-throw) microswitch with fine silver (Ag) contact metallurgy. This mechanical snap-action design guarantees millisecond-fast response times during pressure deviations and ensures high electrical endurance rated up to 10 A at 250 VAC.
Supplied directly from authorized manufacturer inventory with full lot traceability, each unit undergoes strict automated factory testing. All units are backed by an industry-leading 15-month extended factory warranty and comply with CE (CE-0085A03220, CE-0036), EN 1854, EAC, and SIL safety compliance standards for severe industrial burner environments.
Key Engineering Highlights:
- Direct GasMultiBloc & DMV Mounting: Mounts directly onto Dungs valve bodies using the included factory O-ring and dual M4x20 mm fasteners without external tubing.
- Tool-Free Calibrated Adjustment Dial: Integrated yellow graduated scale enables continuous, tool-free setting across 5 to 50 mbar (0.5 to 5.0 kPa) without an external pressure gauge.
- High Max Operating Pressure (500 mbar): Resilient pressure containment rated for Pmax up to 500 mbar (50 kPa), safely withstanding line surges and pressure shocks.
- Tight Switching Hysteresis (Δp ≤ 2.5 mbar): Minimal deadband differential between trip and reset thresholds for high-precision burner staging and lockout safety.
- Heavy-Duty SPDT Fine Silver Contacts: Fine silver (Ag) contacts rated for AC 250V / 10A resistive and 3A inductive loads, providing dependable electrical switching.
- Standard 3-Pin DIN Plug Connection: Electrical interface conforming to DIN EN 175301-803 (formerly DIN 43650) with protection insulation and IP54 seal.
- Fuel Gas Compatibility: Certified for fuel gases of families 1, 2, 3 (natural gas, town gas, LPG, propane, butane) as well as neutral gaseous media.
- Built-In Test Nipple (MS 6): Integrated ø 9 mm pressure test nipple on position 6 for easy field pressure verification using digital manometers.
- Extended 15-Month Factory Warranty: Factory-direct inventory with extended 15-month quality warranty and live video stock inspection support.
Typical Industrial Applications
- Industrial Gas Burners & Forced-Draught Firing Systems: Minimum gas pressure supervisory interlock preventing burner ignition when gas supply falls below safe firing pressure.
- Steam & Hot Water Industrial Boilers: Gas train overpressure cut-off and flame-out protection, interlocking with automatic burner management controllers.
- Dungs GasMultiBloc & DMV Valve Trains: Direct plug-and-play mounting on MB-D, MB-Z, MB-VEF, and DMV double solenoid valves without copper impulse piping.
- Thermal Processing Ovens & Furnaces: High-temperature curing, metal heat treatment, and drying oven gas pressure monitoring with millisecond trip speed.
- Pulsating Supply Gas Lines (GW 50 A5/1): Damped-orifice model prevents nuisance tripping caused by high-frequency regulator cycling or pressure surges.
- Biogas & Dual-Fuel Combustion Equipment: Compatible with natural gas, LPG, propane, and treated fuel gas trains operating under harsh industrial duty cycles.
Patents & Compliance
- CE Certified Gas Appliance Regulation: CE-0085A03220 (Gas Appliances Directive / Regulation EU 2016/426)
- CE Pressure Equipment Directive (PED): CE-0036 (Directive 2014/68/EU)
- European Standard EN 1854: Pressure sensing devices for gas burners and gas burning appliances
- DIN EN 175301-803: Industrial 3-pin plug-and-socket electrical connector standard
- Protection Class IP54: Ingress protection against dust deposits and splashing water from any direction
- Functional Safety SIL Certified: Suitable for safety-related circuits up to SIL 2 according to IEC 61508
- EAC & UKCA Approved: Eurasian Conformity and UK Conformity Assessed certified