Kromschroder Gas pressure switch DG10UG-3K2 84447324

The Kromschroder DG10UG-3K2 is a diaphragm pressure switch designed to monitor pressure fluctuations in gas or air environments. It has a pressure range of 1–10 mbar and operates mechanically. The switch features a glass fibre reinforced PBT plastic housing with a lower housing section of AlSi 12, and a silicone-free NBR diaphragm. It is equipped with gold-plated contacts, screw terminals, and a green/red pilot lamp for 24 V AC/DC. The device is IP54 rated, safety class 1, and complies with EN 1854:2010, with CE product ID CE-0085AP0467.

When selecting a replacement pressure switch of this type, ensure the pressure range, connection thread (M16 x 1.5), and electrical specifications (voltage, contact type) match the original. The switch must be suitable for the medium (gas or air) and comply with relevant standards. Installation involves connecting the pressure line to the appropriate port and wiring the screw terminals, ensuring the pilot lamp voltage is correct. Verify the enclosure rating and ambient temperature limits for the application.

Common failure modes for diaphragm pressure switches include diaphragm rupture or leakage, leading to loss of pressure sensing. This may cause the burner to fail to start, shut down unexpectedly, or not respond to pressure changes. Electrical contact failure can result in no signal or continuous signal, affecting control logic. Check for physical damage, contamination, or corrosion on contacts, and verify the diaphragm integrity by testing pressure response.