Kromschroder Gas pressure switch DG150VC8-6W 84448473

The Kromschroder DG150VC8-6W is a mechanical diaphragm pressure switch designed for overpressure monitoring in gas and air systems. It has an adjusting range of 40–150 mbar and switches with falling pressure. The switch features a microswitch with change-over contact, a 4-pin plug without socket, and a glass fibre reinforced PBT plastic housing with an AlSi 12 lower section. It is silicone-free, has low gas release, and is rated IP54 with a standard socket. The product complies with EN 13611:2015+AC:2016 and EN 1854:2010, and is RoHS compliant.

When selecting a pressure switch of this type, ensure the adjusting range covers the required setpoint, the connection thread matches the system (e.g., R 1/4 external), and the electrical connection is compatible (e.g., 4-pin plug). The switch must be suitable for the medium and ambient temperature range, and the pressure type (overpressure) must align with the application. Mounting should follow the manufacturer's instructions, including torque specifications for cover and socket (45 Ncm).

Common failures include diaphragm rupture or leakage, leading to loss of pressure sensing and incorrect switching. The microswitch may wear out, causing intermittent or no switching. Symptoms on equipment include burner lockout, failure to start, or erratic operation. Check for gas leaks, verify the switch operation with a manometer, and inspect the diaphragm and electrical connections for damage.