DUNGS LGW 10 A2 P Differential Pressure Switch
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DUNGS LGW 10 A2 P Differential Pressure Switch
ORFA Endüstriyel Mamüller Sanayi ve Ticaret A.Ş. provides the DUNGS LGW 10 A2 P Differential Pressure Switch, a highly reliable and adjustable control device for automatic burner, ventilation, and air-conditioning systems. This pressostat is designed to monitor and switch circuits based on changes in the actual pressure value relative to a set reference value.
The "P" in the model name indicates the inclusion of a built-in test button, which allows for a service-friendly check of the safety function.
Technical Specifications and Features
| Feature | Value |
| Model Type | LGW A2P Differential Pressure Switch (Adjustable) |
| Function | Differential pressure monitoring (Pressure, Vacuum, or Differential) |
| Setting Range | 1 – 10 mbar (Low pressure/vacuum range) |
| Max. Operating Pressure | 500 mbar (50 kPa) |
| Switching Contact | SPDT (Single Pole Double Throw) Microswitch |
| Contact Material | Fine Silver (Ag) standard; Gold-plated Fine Silver (Au) optional for DDC applications. |
| Electrical Rating (Ag) | Max. 250 V AC, 10 A |
| Housing Material | Polycarbonate |
| Diaphragms | NBR (Nitrile Butadiene Rubber) |
| Protection Degree | IP 54 (as per IEC 529 / EN 60529) |
| Ambient/Medium Temp. | -15°C to +60°C Some versions up to +70°C |
| Connections | LGW A2P: G 1/4 tapered female thread (for higher pressure connection) and G 1/8 female thread (for lower pressure connection) |
| Key Feature | Integrated Test Button for safety function check |
Operating Principle and Applications
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Principle: The differential pressure acts against the force of an adjustable setting spring on the microswitch via the diaphragm. The switch operates entirely without auxiliary power.
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Functionality: The microswitch changes its contact position (from Normally Open to Normally Closed or vice-versa) when the pressure difference exceeds or falls below the setpoint, triggering safety shut-off valves or alarms.
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Applications:
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Monitoring the pressure of air, flue gases, and non-aggressive combustion gases in automatic burner controls (as per EN 1854).
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Differential pressure monitoring in ventilation and air-conditioning (HVAC) systems.
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