Kromschroder Air pressure switch DL10K-4W 84444831

The Kromschroder DL10K-4W is a mechanical diaphragm pressure switch designed for monitoring overpressure, vacuum, and pressure drop in air or flue gas systems. It has an adjustable switching range of 1.0 to 10 mbar and features a tempered LSR diaphragm system. The housing is made of glass fibre reinforced PBT plastic with a hand wheel for adjustment and a tube connection. It includes a microswitch to EN 61058-1, screw terminals, and an IP65 protection class. The switch weighs 0.4 kg and is suitable for use as a special-design pressure switch.

When selecting a pressure switch of this type, verify the required pressure range, medium compatibility (air or flue gas), and electrical ratings. Check the connection type (e.g., tube connection) and mounting options, such as a Z-angle bracket. Ensure the switching function (overpressure, vacuum, or pressure drop) matches the application. Compare the physical dimensions and thread sizes with the existing installation before ordering.

Common failure modes include diaphragm rupture or leakage, leading to loss of pressure sensing or false switching. Microswitch contacts may wear or stick, causing intermittent or no switching. Symptoms on equipment include burner lockout, fan failure alarms, or erratic pressure readings. Check for visible damage, test the switch with a manometer, and verify electrical continuity.