Kromschroder Spring 75422020

The Kromschroder Spring 75422020 is a replacement spring for gas pressure regulators, designed for precise outlet pressure adjustment. It is compatible with Kromschroder GBF40, VGBF25-40, and VAR25-40 models. The spring is rated for an outlet pressure range of 85-105 mbar and is color-coded white for identification. It is made of spring steel, with dimensions of 150 mm in length, 42 mm in width and height, and a weight of 105 g. This spring is suitable for use with natural gas and liquefied gas (propane-butane) applications, and complies with safety standards EN 88 and EN 746-2.

Parts of this type are selected by matching the required outlet pressure range and the specific regulator model. Before ordering, verify the spring's color coding and part number against the original component. During installation, ensure the spring sits correctly in its housing and that the adjustment screw moves freely. After replacement, recalibrate the pressure switch or valve using a manometer to confirm actual pressures match the burner control settings.

When springs of this kind fail, they may lose tension or deform, causing unstable gas pressure regulation. Symptoms include burner ignition failure, unstable firing, or nuisance lockouts. Check the spring for signs of wear or deformation, and compare its pressure response to the specified range using a manometer.