DUNGS GW 500 A4 Pressure Switch for Gas and Air

Description

The DUNGS GW 500 A4 is a compact and reliable adjustable pressure switch designed for monitoring pressure in industrial and commercial combustion systems. It is suitable for switching a circuit on, off or over on changes in actual pressure value relative to the set point. The set point can be easily adjusted using the dial without the need for a pressure gauge.

Specifications

• Manufacturer: DUNGS
• Model: GW 500 A4
• Part Number: 223168
• Adjustable Range: 100 to 500 mbar
• Maximum Operating Pressure: 1 bar (1000 mbar)
• Media: Gas, Air, Flue Gas
• Electrical Connection: Screw terminals via PG 13.5 cable gland
• Switching Capacity: 10A at 250V AC
• Protection Rating: IP 54

Label Info

• ID-No: CE-0085 A00012
• TUV Certification: 12/94 0165

Application

This pressure switch is commonly used in gas trains for industrial burners, boilers, and heating appliances to ensure safe operating pressures are maintained.

Country of Origin

Made in Germany.

CO2 Impact

Opting for this pre-owned component saves approximately 20 kg of CO2 emissions compared to manufacturing a new one.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

The switching differential (hysteresis) for the GW 500 A4 is typically less than or equal to 20 mbar and is not adjustable. This ensures a stable switching point.

Standard versions are designed for natural gas and air. For aggressive gases like biogas, which may contain H2S, a special version (e.g., with a Viton diaphragm) is required. Please check the compatibility of this specific unit's materials.

For a normally open (NO) circuit that closes on rising pressure, you would connect your circuit to terminals COM (Common) and 2NO (Normally Open). The circuit will be complete when the pressure exceeds the setpoint.

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Last Update: Friday, March 13, 2026