Kromschroder Gas pressure switch DG6U-6T2 84447283

The Kromschroder DG6U-6T2 (SKU 84447283) is a diaphragm pressure switch designed for monitoring pressure fluctuations in gas or air systems. It operates effectively for both increasing and decreasing pressure. The switch features a glass fibre reinforced PBT plastic housing with low gas release, an NBR diaphragm, and a lower housing section made of AlSi 12. It has a connection thread of M16 x 1.5, screw terminals for electrical connection, and is silicone-free. The device is suitable for media such as natural gas, town gas, LPG (gaseous), flue gas, biogas (max. 0.1 %-by-vol. H2S), and air, with a maximum medium and ambient temperature range of -20 to +80 °C.

When selecting a replacement pressure switch of this type, ensure that the connection thread (e.g., M16 x 1.5) matches the existing installation. Verify the electrical connection type (screw terminals) and the line entrance diameter to accommodate the cable. Check the pressure range and switching differential to match the application requirements. Also, confirm the medium compatibility and temperature range for the specific gas or air environment.

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 burner lockout, erratic operation, or failure to detect pressure changes. Check for visible damage to the diaphragm, ensure the pressure sensing line is clear, and verify the switch operation with a manometer.