Kromschroder Gas pressure switch DG 6UG-6 84447271

Kromschroder DG 6UG-6 gas pressure switch, SKU 84447271, monitors overpressure, negative pressure, and differential pressure of gas and air. It has an adjustment range of 0.4 to 6 mbar and is set via a handwheel. The switch features gold-plated contacts and a standard 4-pin connector. It is manufactured in Germany.

Parts of this type are selected by the medium (gas or air), required switching range and differential, connection thread size, and contact rating. The switch must be mounted in the correct orientation per the manufacturer's instructions, and the impulse line must be clean. Ensure the setpoint is adjusted to match the system's required pressure band.

Typical failure modes include a torn diaphragm, blocked impulse tube, or drifted setpoint. These manifest as burner lockouts that may be mistaken for ignition problems. Check the impulse line for blockages and verify the switch's setpoint against the actual system pressure.