Kromschroder Gas pressure switch DG17VC1-6W /B 75455241

The Kromschroder DG17VC1-6W /B (SKU 75455241) is a diaphragm pressure switch designed for monitoring gas and air pressure, including biomethane. It has an adjustable pressure range of 7.5–42.5 mbar. The switch features a glass fibre reinforced PBT plastic housing with a lower housing section of AlSi 12, and an NBR diaphragm that is silicone-free. It operates with a 4-pin plug connection and has a safety class of 1. The device weighs 100 g and is suitable for use with natural gas, town gas, LPG (gaseous), flue gas, biogas, and air.

When selecting a pressure switch of this type, ensure the pressure range, electrical connection, and process connection match the system requirements. Verify the medium compatibility and temperature range. Installation involves connecting the pressure line to the appropriate port and wiring the electrical plug according to the system's control circuit. Adjust the switching point using the hand wheel after installation.

Common failure modes for diaphragm pressure switches include diaphragm rupture or leakage, leading to loss of pressure sensing and incorrect switching. Symptoms may include the burner failing to start, unexpected shutdowns, or failure to detect pressure drops. Check for physical damage, verify the diaphragm integrity, and test the switch operation with a manometer and ohmmeter.