Kromschroder Gas pressure switch DG500TG-22K2 84447843

The Kromschroder DG500TG-22K2 (SKU 84447843) is a gas pressure switch designed to monitor the pressure of gas, air, and biologically produced methane. It has a pressure range of 100–500 mbar and features two 1/4 NPT pressure connections. The switch is equipped with a handwheel for adjusting the switching point and includes a red/green indicator lamp for 24 V with gold-plated contacts. Electrical connection is via screw terminals and a 1/2 NPT cable entry. This device is certified by FM and UL.

Pressure switches of this type are selected by matching the pressure range, connection thread size, and electrical ratings to the system requirements. Before ordering, verify the thread type (e.g., NPT) and the number of pressure connections needed. Installation involves connecting the pressure lines to the appropriate ports and wiring the electrical terminals according to the system voltage and indicator requirements.

Common failure modes for such pressure switches include diaphragm rupture, contact welding, or loss of calibration. Symptoms may include the burner failing to start, unexpected shutdowns, or the indicator lamp not reflecting the actual pressure state. Check for leaks at the connections, verify the setpoint against a manometer, and inspect the electrical contacts for damage.