Kromschroder Gas pressure switch DG30VC8D-5W 84448250

The Kromschroder DG30VC8D-5W gas pressure switch (SKU 84448250) monitors positive pressure of gases such as natural gas, town gas, LPG, flue gas, biogas, and air. It has an adjustable pressure range of 8–30 mbar and switches with falling pressure. The switch features a diaphragm system, a glass fibre reinforced PBT plastic housing with low gas release, and an NBR diaphragm. It is silicone-free, has a protection class of IP54 with a standard socket, and is designed for a lifetime of 10 years. The product is CE certified (CE-0085AQ0753) and complies with EN 13611:2015+AC:2016 and EN 1854:2010.

When selecting a gas pressure switch of this type, ensure the pressure range, connection thread (e.g., R 1/4 external), and electrical connection (e.g., 4-pin plug) match the system requirements. The switching function (rising or falling pressure) must align with the application. Mounting involves connecting the thread to the gas line and securing the electrical plug. Verify the protection class needed for the environment, as enclosures vary with socket types.

Common failures include diaphragm rupture or leakage, leading to loss of pressure sensing and incorrect switching. Symptoms may include burner lockout, failure to start, or erratic operation. Check for gas leaks around the connection and test the switch by adjusting the setpoint to see if it activates correctly. Inspect the diaphragm for damage or contamination.