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Ex-DGM Pressure Monitors for Fuel Gases

FEMA Ex-DGM pressure monitors are used for safe monitoring of fuel gas pressure in potentially explosive atmospheres. They are suitable for gas-carrying systems where pressure limits must be reliably monitored and electrical switching functions must be triggered when a defined switching point is reached.

The Ex-DGM series is designed as an Ex-d pressure monitor for fuel gases. DGM gas pressure monitors are DVGW-tested according to DIN EN 1854 and are suitable for all gases according to DVGW worksheet G 260 as well as for air. This makes them particularly suitable for applications in gas supply systems, burner controls, gas pressure regulating lines, heating systems and industrial firing systems.

Depending on the version, Ex-DGM pressure monitors can be used for maximum or minimum pressure monitoring. When the set limit value is reached, the mechanical measuring element actuates a microswitch. The switching signal can be used for release, shutdown, alarm or lockout functions within the system control.

The Ex version is intended for applications where explosion protection requirements must be fulfilled in addition to gas pressure monitoring. Ex-DGM pressure monitors are therefore suitable for system areas where flammable gases may occur and where an appropriate electrical design is required.

Pressure detection is mechanical and requires no additional auxiliary power for the measuring function itself. The applied gas pressure acts on a measuring element which actuates the contact when the set switching point is reached. Electrical integration must be carried out according to the requirements of the respective Ex zone and system classification.

Typical Applications

• Pressure monitoring in potentially explosive atmospheres
• Gas pressure monitoring in fuel gas systems
• Maximum and minimum pressure monitoring in gas lines
• Monitoring of gas pressure regulating lines and burner controls
• Use in heating systems and industrial firing systems
• Applications with gases according to DVGW worksheet G 260
• Safety and release functions in gas-carrying systems

Advantages of FEMA Ex-DGM Pressure Monitors

• Designed for fuel gases: suitable for gas pressure monitoring in gas-carrying systems
• Ex-d version: intended for applications in potentially explosive atmospheres
• DVGW-tested: DGM gas pressure monitors are tested according to DIN EN 1854
• For gases according to DVGW G 260: suitable for all gases according to DVGW worksheet G 260 as well as for air
• Maximum and minimum pressure monitoring: suitable for monitoring upper and lower gas pressure limits
• Mechanical switching principle: robust pressure detection without auxiliary power for the measuring element
• For burner and gas regulating technology: suitable for release, shutdown and monitoring functions

Ex-DGM Pressure Monitors at ICS Schneider

ICS Schneider offers FEMA Ex-DGM pressure monitors for fuel gases for applications with increased requirements regarding gas pressure monitoring and explosion protection. The devices are suitable for operators, plant manufacturers and service companies that require a robust mechanical solution for fuel gas systems and hazardous areas.

When selecting the correct Ex-DGM pressure monitor, the gas type, pressure range, required switching point, maximum or minimum pressure function, maximum permissible pressure, electrical switching capacity, Ex zone, type of protection, connection type, installation situation and safety-related requirements should be considered. Since fuel gas and Ex applications are safety-related, the design should always be based on the specific system data and applicable regulations.

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

1. What is a FEMA Ex-DGM pressure monitor?

A FEMA Ex-DGM pressure monitor is a mechanical switching device used to monitor fuel gas pressure in potentially explosive atmospheres. It switches when a set pressure limit is reached.

2. Which media is Ex-DGM suitable for?

Ex-DGM is suitable for fuel gases or gases according to DVGW worksheet G 260 as well as for air. Exact suitability should be checked based on the technical data and system conditions.

3. Which standard are DGM gas pressure monitors tested according to?

DGM gas pressure monitors are DVGW-tested according to DIN EN 1854. This standard is relevant for gas pressure monitors in fuel gas applications.

4. What does Ex-d mean for Ex-DGM?

Ex-d refers to an explosion-protected design with flameproof enclosure. It is intended for specific potentially explosive atmospheres. Exact suitability must match the Ex zone and system classification.

5. Can Ex-DGM be used for maximum pressure monitoring?

Yes. Depending on the system function, Ex-DGM pressure monitors can be used for maximum pressure monitoring to detect inadmissibly high gas pressure.

6. Can Ex-DGM be used for minimum pressure monitoring?

Yes. Ex-DGM can also be used for minimum pressure monitoring, for example to detect insufficient gas supply pressure and shut down or lock out a system.

7. Does Ex-DGM require a supply voltage?

No supply voltage is required for mechanical pressure detection itself. An electrical connection is only required for the switching contact or switching signal.

8. Where is Ex-DGM typically used?

Typical applications include burner controls, gas pressure regulating lines, heating systems, industrial firing systems, gas supplies and gas-carrying safety chains in hazardous areas.

9. How does Ex-DGM differ from standard DGM pressure monitors?

Ex-DGM is designed for potentially explosive atmospheres. Standard DGM pressure monitors are intended for standard applications without corresponding Ex requirements.

10. Is Ex-DGM suitable for air?

Yes. DGM gas pressure monitors are suitable for all gases according to DVGW worksheet G 260 as well as for air.

11. What information is important for selecting the correct device?

Important information includes the gas type, pressure range, required switching point, maximum pressure load, function as maximum or minimum pressure monitor, electrical switching capacity, Ex zone, connection type, installation situation and required approvals.

12. Why is correct selection especially important for Ex-DGM?

In fuel gas and Ex applications, pressure range, gas type, explosion protection, electrical integration and safety function must precisely match the system. Incorrect selection can impair operational safety.