Kromschroder Gas pressure switch DG 150UG-6 84447521

This is an industrial gas pressure switch from Kromschroder, model DG 150UG-6, SKU 84447521, in the pressure switch category. It monitors gas, air, and biogas pressure with an adjustable setpoint range of 30–150 mbar. The switching point is set via a handwheel, and electrical connection is made through a 4-pin connector with socket. It features gold-plated contacts for consistent low-level switching. The device carries CE, EAC, and RoHS certifications.

Parts of this type are selected by the medium (gas, air or biogas), the required switching range and differential between trip and reset, the connection thread or hose spigot size, and the contact rating to suit the burner control. An impulse line is normally connected to the process pressure, and the unit should be mounted with the diaphragm in the specified orientation. Before ordering, compare the model's marked range and the actual setpoint needed, and confirm the safety approval class (for example EN 1854) is accepted in your jurisdiction. On installation, ensure the impulse line is clean, and recheck the setpoint with a manometer per the commissioning sheet.

Common failure modes include a torn diaphragm, a blocked impulse tube, or a drifted setpoint. The burner then locks out or fails to start, often misdiagnosed as an ignition fault. Check the impulse line for blockage, inspect the diaphragm, and verify the setpoint against a manometer.