Kromschroder Gas pressure switch DG110VC1-6W /B 75455245

The Kromschroder DG110VC1-6W /B is a diaphragm pressure switch designed for monitoring gas and air pressure, including biomethane. It has an adjusting range of 30–110 mbar and can handle medium and ambient temperatures from -20 to 80 °C. The switch features a glass fibre reinforced PBT plastic housing with a lower housing section made of AlSi 12, and a silicone-free NBR diaphragm. It connects via a 4-pin plug with socket and has a Valvario connection at the bottom, with a pressure tap on the plug side. The device is silicone-free and has low gas release, with a weight of 100 g and a line diameter of 0.5–1.8 mm.

When selecting a pressure switch of this type, ensure the adjusting range and pressure range match your system requirements. Check the electrical connection type (e.g., 4-pin plug) and the line entrance thread (M16 x 1.5) for compatibility. The switch can be mounted with the Valvario connection at the bottom; verify the pressure tap side orientation. Confirm the medium and ambient temperature limits and that the switch is suitable for your gas type. For installation, disconnect power, detach the housing cover, and set the switching point using the hand wheel while monitoring with an ohmmeter and pressure gauge.

Common failures of diaphragm pressure switches include diaphragm rupture or leakage, leading to inaccurate pressure readings or failure to switch. Symptoms may include the burner not starting, unexpected shutdowns, or the system not responding to pressure changes. Check for gas leaks, inspect the diaphragm for damage, and verify the electrical connections. If the switch fails to operate, test the switching point with a pressure gauge and ohmmeter to determine if recalibration or replacement is needed.