Kromschroder Gas pressure switch DG10U-6 84447301

The Kromschroder DG10U-6 gas pressure switch (SKU 84447301) is a diaphragm-type pressure switch designed for monitoring pressure changes in gas or air systems. It has an adjusting range of 1–10 mbar and features a glass fibre reinforced PBT plastic housing with a lower housing section made of AlSi 12. The diaphragm is made of NBR and is silicone-free, ensuring low gas release. The switch is equipped with a 4-pin plug with socket and screw terminals, and has a connection thread of M16 x 1.5. It is safety class 1 and suitable for use with natural gas, town gas, LPG (gaseous), flue gas, biogas (max. 0.1 %-by-vol. H2S), and air.

When selecting a pressure switch of this type, ensure the adjusting range matches the required pressure setpoint for your application. The connection thread (e.g., M16 x 1.5) must be compatible with the system's port, and the electrical connection (e.g., 4-pin plug with socket) should match the existing wiring. Verify the medium compatibility (gas or air) and the maximum allowable medium and ambient temperatures. For installation, mount the switch in the correct orientation and ensure the line entrance is properly sealed to avoid leaks.

Common failure modes for diaphragm pressure switches include diaphragm rupture or leakage, which can cause the switch to fail to actuate at the set pressure or to leak gas. Symptoms may include the burner not starting, unexpected shutdowns, or pressure readings that do not match the setpoint. Check for physical damage, contamination, or wear on the diaphragm and housing, and verify the electrical continuity of the switch contacts. Regular functional testing and leak checks are recommended to detect issues early.