Kromschroder Air pressure switch DL2E-1 84444150

The Kromschroder DL2E-1 air pressure switch (SKU 84444150) is a safety-relevant product designed to control positive, negative, or differential air or flue gas pressures. It has a pressure range of 0.2–2 mbar and features a tempered LSR diaphragm system within a glass fibre reinforced PBT plastic housing. The switch uses a microswitch conforming to EN 61058-1 and is safety class II to VDE 0106-1. It is approved under CE-0085AP0466 and is suitable for media such as air or flue gas, with a designed lifetime of 10 years.

When selecting a replacement pressure switch of this type, ensure the pressure range, electrical connection (e.g., AMP plugs), and safety approvals match the original. The switch must be compatible with the medium (air or flue gas) and the system's pressure type (positive, negative, or differential). Mounting and electrical connections should be verified against the existing unit, and the cover screw and strain relief torque should be set to the specified value (e.g., 65 Ncm) during installation.

Common failure modes for such pressure switches include diaphragm rupture or leakage, leading to incorrect pressure sensing or no switching action. This may cause the burner to fail to start, shut down unexpectedly, or operate with improper air/fuel ratios. Check for physical damage, contamination, or loose electrical connections, and verify the switch's operation against the set pressure range.