DUNGS LGW 50 A4 Differential Pressure Switch

Description

The DUNGS LGW 50 A4 is a high-quality differential pressure switch designed for monitoring overpressure, underpressure, and differential pressure of air and other non-aggressive gases. Its adjustable setpoint and robust construction make it an ideal choice for a wide range of applications in industrial heating, ventilation, and air conditioning (HVAC) systems. The device provides a crucial safety and control function, ensuring systems operate within specified pressure limits.

Specifications

• Manufacturer: DUNGS
• Type: LGW 50 A4
• Adjustment Range: 2.5 to 50 mbar
• Maximum Operating Pressure (pmax): 500 mbar
• Media: Air, flue gas, and other non-aggressive, non-combustible gases
• Switching Capacity: 10A at 250V AC
• Protection Rating: IP54
• Ambient Temperature Range: -15 deg C to +70 deg C
• Electrical Connection: Screw terminals

Label Info

• ID No: CE-0085 AQ0673
• TUEV Certification: TUE 12/99 0178 'S'

Application

This pressure switch is commonly used in gas-fired burner controls, ventilation duct monitoring, filter monitoring, and air flow control systems to ensure safe and efficient operation.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this reconditioned DUNGS pressure switch, you are helping to avoid the production of a new unit, which saves an estimated 7 kg of CO2. This saving is comparable to driving a car for 35 kilometers.

Availability

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

FAQ

Question?
What is the difference between the LGW...A4 and the LGW...A2 series?

Answer: The LGW...A4 series, like this model, has a die-cast aluminum housing for higher robustness and is suitable for a wider range of industrial applications. The LGW...A2 series typically has a plastic housing and is often used in more standardized OEM applications.

Answer: Installation should always be performed by a qualified technician. The switch is typically installed vertically. Connect the higher pressure line to port P1 and the lower pressure line to port P2. To test, use a manometer to apply a known pressure and verify that the switch actuates at the setpoint on the dial.

Answer: No, the DUNGS LGW 50 A4 is designed exclusively for dry, non-aggressive gases like air, natural gas, and flue gas. Using it with liquids or corrosive media will damage the diaphragm and internal components, leading to failure.

Last Update: Friday, March 13, 2026

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