Kromschroder Air pressure switch DL3AG-6K2 84444453

The Kromschroder DL3AG-6K2 is a mechanical diaphragm pressure switch designed for air or flue gas, capable of measuring positive, negative, or differential pressure. It has an adjusting range of 0.2 to 3 mbar and operates within a temperature range of -20 to 80 °C. The switch features a glass fibre reinforced PBT plastic housing, a tempered LSR diaphragm, and a microswitch with gold-plated contacts. It is certified to EN 1854:2010 and has a designed lifetime of 10 years. The product ID is CE-0085AP0466, and it weighs 0.22 g.

When selecting a pressure switch of this type, ensure the pressure range, medium compatibility, and electrical connection match the system requirements. The switch must be installed with the correct connection thread (e.g., Rp 1/4) and torque for the cover screw and strain relief (65 Ncm). Verify the ambient and medium temperatures are within the specified limits. The switch can be used for positive, negative, or differential pressure applications.

Common failure modes for such pressure switches include diaphragm rupture, contact wear, or loss of calibration. Symptoms may include the burner failing to start, erratic operation, or safety lockouts. Check the diaphragm for damage, verify the switch actuates at the set point, and inspect the electrical connections for continuity.