Kromschroder Air pressure switch DL50E-1 84444280

The Kromschroder DL50E-1 is a diaphragm pressure switch with SKU 84444280, designed to regulate positive, negative, or differential air and flue gas pressures. It has an adjusting range of 2.5 to 50 mbar and features a tempered LSR diaphragm system. The housing is made of glass fibre reinforced PBT plastic, and the electrical connection uses AMP plugs. The switch operates with a microswitch conforming to EN 61058-1 and meets safety class 2 standards. It weighs 100 g, with cover screw and strain relief torque both at 65 Ncm.

When selecting a replacement pressure switch of this type, ensure the pressure range matches the system's requirements, and verify the electrical connection type (e.g., AMP plugs) and mounting configuration. The switch must be compatible with the medium (air or flue gas) and temperature range. Check the diaphragm material and housing for suitability with the environment. Installation should follow the manufacturer's instructions, including proper torque for cover screws and strain relief.

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 or shut down unexpectedly. Microswitch contacts can wear or stick, resulting in erratic operation or no signal. Check for physical damage, contamination, or corrosion on the sensing element and electrical connections. Verify the switch operation by comparing its response to a known pressure source.