Kromschroder Gas pressure switch DG10B-3 84447150

The Kromschroder DG10B-3 is a diaphragm pressure switch designed to monitor gas or air pressure changes, both increasing and decreasing. It has a pressure range of 1–10 mbar and operates as a mechanical switch with a NBR diaphragm. The housing is made of glass fibre reinforced PBT plastic with a lower housing of AlSi 12, and it is silicone-free with low gas release. It features a M16 x 1.5 connection thread and line entrance, screw terminals, and an IP54 protection class. The switch complies with EN 1854:2010 and safety class 1.

When selecting a pressure switch of this type, ensure the pressure range and connection thread match the system requirements. The switch must be compatible with the gas type and pressure direction (rising or falling). Installation involves connecting the pressure line to the M16 x 1.5 thread and wiring via screw terminals. After installation, perform a leak check and functional test, especially for decreasing pressure control.

Common failures include diaphragm rupture or leakage, leading to incorrect pressure readings or failure to switch. Symptoms may include burner lockout, erratic operation, or no response to pressure changes. Check for leaks, diaphragm integrity, and proper electrical connections. Regular maintenance, including annual functional checks, is recommended.