Kromschroder Gas pressure switch DG6UG-4 84447000

The Kromschroder DG6UG-4 gas pressure switch (SKU 84447000) is a pressure switch designed to regulate positive, negative, or differential air and flue gas pressures. It has an adjusting range of 0.4-6 mbar and switches with rising pressure. The switch features gold-plated contacts, screw terminal electrical connections, and an M16 cable gland, with an IP65 protection class. It weighs 0.321 kg and has a designed lifetime of 10 years. It complies with EN 13611:2015+AC:2016 and EN 1854:2010 standards, and holds approval CE-0085AP0466 under the Low Voltage Directive (2009/142/EC).

When selecting a replacement pressure switch of this type, ensure the pressure range and switching function (rising pressure) match the application requirements. Verify the electrical connection type (screw terminals) and cable gland size (M16) are compatible with the existing wiring. The protection class (IP65) must be suitable for the installation environment. Mounting dimensions and process connections should be compared with the original part before ordering.

Common failure modes for this type of pressure switch include contact wear or sticking, which can cause the burner to fail to start or shut down unexpectedly. A faulty switch may result in no pressure signal, leading to a lockout or error code on the control system. Check the switch for proper operation by measuring continuity across the contacts while applying pressure within the set range. Also inspect for physical damage or contamination that could affect the diaphragm or switching mechanism.