Kromschroder Pressure switch for gas DG 60/300VC4-6W 84448934

The Kromschroder DG 60/300VC4-6W (SKU 84448934) is a mechanical diaphragm pressure switch designed for gas applications. It has an adjusting range of 100–300 mbar and a pressure range of 10–60 mbar. The switch operates with falling pressure and features a change-over contact. It is suitable for media such as natural gas, town gas, LPG (gaseous), flue gas, biogas (max. 0.1 %-by-vol. H2S), and air. The device is silicone-free, has a glass fibre reinforced PBT plastic housing with an AlSi 12 lower section, and is IP54 rated with a standard socket. It is certified to EN 1854:2010 and is RoHS compliant.

When selecting a pressure switch of this type, verify the required pressure range and switching function (e.g., falling pressure). Ensure the connection thread (e.g., Rp 1/4 internal) matches the system. Check the electrical connection type (e.g., 4-pin plug) and enclosure rating for the environment. Confirm the medium compatibility and temperature limits. The switch may have adjustable set points via a hand wheel; set it according to the application.

Common failures include diaphragm rupture or leakage, leading to loss of pressure sensing. This may cause the burner to fail to start or shut down unexpectedly. Electrical contact issues can result in intermittent operation. Check for gas leaks, diaphragm integrity, and proper electrical connections.