Kromschroder Gas pressure switch DG150UG-6K2 84447523

The Kromschroder DG150UG-6K2 is a diaphragm pressure switch designed to monitor pressure fluctuations in gas or air systems. It operates over an adjusting range of 30–150 mbar and can sense positive, negative, or differential pressure. The switch features gold-plated contacts and a 4-pin plug with socket for electrical connection, with a pilot lamp voltage of 24 V AC/DC. Its housing is made of glass fibre reinforced PBT plastic with a lower housing of AlSi 12, and the diaphragm is NBR, silicone-free. The product is certified to CE-0085AP0467 and complies with EN 13611:2015+AC:2016 and EN 1854:2010.

When selecting a replacement pressure switch of this type, ensure the pressure range, connection thread (M16 x 1.5), and electrical connection (4-pin plug) match the existing installation. Verify the medium compatibility (gas or air) and the required pressure type (positive, negative, or differential). The line diameter for electrical wiring must be within 0.5–1.8 mm, and the line entrance thread should be M16 x 1.5. Also confirm the safety class and any applicable certifications for your region.

Common failures of diaphragm pressure switches include diaphragm rupture or leakage, leading to loss of pressure sensing and incorrect switching. Symptoms may include burner lockout, failure to start, or erratic operation due to false pressure readings. Check for physical damage, contamination, or wear on the diaphragm and verify the electrical contacts for corrosion or pitting. Ensure the pressure setpoint is correctly adjusted and that the switch is not exposed to temperatures outside its rated range.