Kromschroder Gas pressure switch DG50S-3 84447240

The Kromschroder DG50S-3 is a diaphragm pressure switch designed to monitor rising and falling pressure in gas systems. It operates within a pressure range of 2.5 to 50 mbar and is suitable for media such as NH3, O2, and air. The switch features a silicone-free IIR diaphragm, an AlSi 12 lower housing, and a glass fibre reinforced PBT plastic housing with low gas release. It has an IP 54 or IP 65 protection class, safety class 1, and electrical connection via screw terminals. The device weighs 321 g and is RoHS compliant, with certification under 2006/95/EC. Maintenance is required annually, including a leak check for tightness.

When selecting a pressure switch of this type, ensure the pressure range, gas compatibility, and electrical connection match the system requirements. The switch must be installed with the correct line entrance thread (M16 x 1.5) and clamping range for the cable diameter. Verify the protection class and safety class meet the installation environment. After installation, check for proper function and tightness.

Common failures of diaphragm pressure switches include diaphragm rupture or leakage, leading to incorrect pressure monitoring or failure to switch. Symptoms may include the burner not starting, erratic operation, or failure to detect pressure changes. Check for gas leaks, diaphragm integrity, and proper electrical connections. Regular annual maintenance is essential to prevent such issues.