Kromschroder Gas pressure switch DG150B-6 84447401

The Kromschroder DG150B-6 is a differential pressure switch designed for monitoring and regulating air and flue gas pressures in boilers, ventilation systems, and industrial equipment. It has an adjusting range of 30–150 mbar and operates with rising positive pressure. The electrical connection is via a 4-pin plug with socket. This component is suitable for industrial and commercial applications where precise pressure control is required. The article numbers are 84447401 and 624.214.010.

When selecting a replacement pressure switch of this type, ensure that the pressure range and adjusting range match the system requirements. The electrical connection type (e.g., 4-pin plug with socket) must be compatible with the existing wiring. Verify the pressure type (differential vs. gauge) and the switching function (e.g., rising or falling pressure) to match the application. Installation should follow the manufacturer's guidelines, ensuring proper mounting orientation and connection to the pressure sensing points.

Common failure modes for differential pressure switches include diaphragm rupture, contact welding, or loss of calibration. Symptoms may include the burner failing to start, erratic operation, or the system not responding to pressure changes. Check for physical damage, verify the setpoint with a manometer, and inspect electrical continuity across the contacts.