Kromschroder Pressure switch for gas DG50U-3T2 84447387

The Kromschroder DG50U-3T2 pressure switch (SKU 84447387) is a diaphragm-type pressure switch designed for monitoring pressure changes in gas or air environments. It features a glass fibre reinforced PBT plastic housing with low gas release, and the lower housing section is made of AlSi 12. The switch is silicone-free and has a connection thread of M16 x 1.5, with electrical connection via screw terminals. It is classified under safety class 1 and is suitable for use with natural gas, town gas, LPG (gaseous), flue gas, biogas (max. 0.1% by vol. H2S), and air.

When selecting a replacement pressure switch of this type, ensure the connection thread (e.g., M16 x 1.5) matches the existing line entrance, and verify the electrical connection type (screw terminals) is compatible. The switch should be chosen based on the required pressure range and the medium (gas or air) it will monitor. Installation involves connecting the pressure line to the switch and wiring the screw terminals according to the system's electrical specifications.

Common failure modes for diaphragm pressure switches include diaphragm rupture or leakage, which can cause the switch to fail to detect pressure changes or to trigger false alarms. Symptoms may include the burner not starting, unexpected shutdowns, or erratic operation. Check the diaphragm for damage, verify the pressure setting, and ensure the electrical connections are secure.