Kromschroder Gas pressure switch DG150VC4-6WG 84448484

The Kromschroder DG150VC4-6WG is a mechanical diaphragm pressure switch with an adjusting range of 40–150 mbar. It features a glass fibre reinforced PBT plastic housing with a lower housing section of AlSi 12, and a NBR diaphragm. The switch is silicone-free, has low gas release, and is RoHS compliant. It operates with a microswitch with change-over contact and is designed for use with gases and air. The electrical connection is via a 4-pin plug with socket, and the enclosure is rated IP54 with a standard socket.

When selecting a pressure switch of this type, ensure the adjusting range and switching function (e.g., switches with falling pressure) match the application requirements. The connection thread must be compatible with the system's piping, and the electrical connection type (e.g., 4-pin plug) should match the existing wiring. Consider the medium and ambient temperature limits, as well as the protection class needed for the environment. Always verify the pressure range and switching point adjustment method before installation.

Common failure modes for diaphragm pressure switches include diaphragm rupture or leakage, which can cause the switch to fail to actuate or to actuate at incorrect pressures. Symptoms may include the burner not starting, unexpected shutdowns, or erratic pressure readings. Check for visible damage to the diaphragm or housing, and verify the switching point by applying controlled pressure. Also inspect the electrical contacts for wear or corrosion, as this can lead to intermittent operation.