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DGM Pressure Monitors for Fuel Gases According to the Pressure Equipment Directive

FEMA DGM pressure monitors are used for reliable monitoring of fuel gas pressure in gas-carrying systems. They are used for maximum and minimum pressure monitoring and switch as soon as the set pressure limit is reached. This allows burners, gas pressure regulating lines, supply lines and safety-related system areas to be monitored and protected.

The DGM series is designed as a pressure monitor for fuel gases according to DIN EN 1854. It is suitable for applications with fuel gases according to DVGW worksheet G 260 and is typically used in heating systems, industrial firing systems, process heat generators, gas supply systems and burner controls.

Depending on the version, different setting ranges are available, for example 15–60 mbar, 20–100 mbar, 40–160 mbar, 40–250 mbar, 100–600 mbar or 0.2–1.6 bar. The maximum permissible pressures vary depending on the type and are, for example, 0.8 bar, 2 bar, 3 bar or 5 bar. The switching differential is not adjustable and is defined by the respective device version.

DGM variants with gold-plated contacts, service function, terminal connection, plastic-coated housing or Ex-i suitability are available for different requirements. This allows the correct pressure monitor to be adapted to the electrical integration, system environment and safety-related requirements.

The devices operate according to a mechanical switching principle. The applied gas pressure acts on a measuring element which actuates a microswitch when the set limit value is reached. The switching signal can be used for release, shutdown, alarm or lockout functions within a system control.

Typical Applications

• Maximum pressure monitoring in fuel gas systems
• Minimum pressure monitoring in gas supply systems
• Pressure monitoring in gas pressure regulating lines
• Burner controls in heating and process systems
• Safety shutdown in case of inadmissible gas pressure
• Industrial firing systems and heat generators
• Applications with fuel gases according to DVGW worksheet G 260

Advantages of FEMA DGM Pressure Monitors

• Designed for fuel gases: pressure monitor for fuel gas according to DIN EN 1854
• For maximum and minimum pressure: suitable for monitoring upper and lower gas pressure limits
• Wide type selection: versions available from the mbar range up to 1.6 bar
• Mechanical switching principle: robust pressure detection without auxiliary power for the measuring element
• Fixed switching differential: clearly defined switching function depending on the device type
• Special versions available: depending on the variant, available with gold-plated contacts, service function or terminal connection
• Ex-i versions possible: for intrinsically safe circuits in corresponding system areas

DGM Pressure Monitors at ICS Schneider

ICS Schneider offers FEMA DGM pressure monitors for various fuel gas applications and pressure ranges. The series is suitable for operators, plant manufacturers and service companies that require a tested mechanical solution for monitoring gas pressure limits.

When selecting the correct DGM pressure monitor, the fuel gas type, setting range, required switching point, maximum permissible pressure, switching differential, electrical switching capacity, connection type, housing version, service requirements, Ex-i requirements and installation situation should be considered. Since fuel gas applications are safety-related, the design should always be based on the specific system data and applicable regulations.

FAQ – Frequently Asked Questions about FEMA DGM Pressure Monitors for Fuel Gases

1. What is a FEMA DGM pressure monitor?

A FEMA DGM pressure monitor is a mechanical switching device used to monitor fuel gas pressure. It switches when a set pressure limit is reached and can be used for control, shutdown or alarm functions.

2. Which media is the DGM series intended for?

The DGM series is intended for fuel gases, especially for applications with fuel gases according to DVGW worksheet G 260.

3. Which standard is DGM designed according to?

DGM pressure monitors are designed as pressure monitors for fuel gas according to DIN EN 1854.

4. Can DGM be used for maximum and minimum pressure monitoring?

Yes. Depending on the system function, DGM pressure monitors can be used for maximum or minimum pressure monitoring.

5. Which setting ranges are available?

Depending on the type, different setting ranges are available, for example 15–60 mbar, 20–100 mbar, 40–160 mbar, 40–250 mbar, 100–600 mbar or 0.2–1.6 bar.

6. Is the switching differential adjustable?

No. The switching differential of DGM pressure monitors is not adjustable. It is fixed depending on the type and pressure range.

7. Which maximum pressures are possible?

The maximum permissible pressure depends on the respective type. The product page lists versions with maximum pressures of 0.8 bar, 2 bar, 3 bar or 5 bar, among others.

8. Are DGM versions with gold-plated contacts available?

Yes. Various DGM versions are available with gold-plated contacts. These are particularly suitable for low switching capacities and signal circuits.

9. What does service function mean?

Versions with service function make testing or maintenance of the pressure monitor easier during system operation. Exact use depends on the device version and system integration.

10. Are Ex-i versions available?

Yes. Ex-i versions are available for certain DGM types. These are intended for intrinsically safe circuits and must be integrated according to the Ex requirements of the system.

11. Does a DGM pressure monitor require a supply voltage?

No supply voltage is required for mechanical pressure detection itself. Electrical integration is only required for the switching contact or switching signal.

12. What information is important for selecting the correct version?

Important information includes the fuel gas type, setting range, required switching point, maximum pressure, switching differential, electrical switching capacity, connection type, housing version, service function, Ex-i requirements and installation situation.