Kromschroder Gas pressure switch DG150S-3 84447440

The Kromschroder DG150S-3 gas pressure switch, SKU 84447440, monitors gas pressure within a range of 30 to 150 mbar. It is designed for use with NH3, O2, and air, featuring a diaphragm made of IIR and a housing of glass fibre reinforced PBT plastic with a lower housing of AlSi 12. The switch has an IP54 or IP65 protection class, safety class 1, and is RoHS compliant. Electrical connection is via screw terminals, with a line entrance thread of M16 x 1.5 and cable clamping range of 4 to 10 mm.

When selecting a gas pressure switch of this type, ensure the pressure range, gas compatibility, and electrical ratings match the system requirements. Verify the process connection thread size and cable entry specifications. Installation should follow manufacturer guidelines, ensuring proper sealing and electrical connections.

Common failures include diaphragm rupture or leakage, leading to inaccurate pressure readings or failure to switch. Symptoms may include burner lockout, erratic operation, or no response to pressure changes. Check for physical damage, contamination, or wear on the diaphragm and verify electrical continuity.