Kromschroder Adjustment unit 03089221

This Kromschroder adjustment unit is a replacement part for gas pressure regulators in the GDJ and GIK series. It is mounted on the valve body and modulates gas flow by positioning the valve disc or servo regulator. It is compatible with GDJ/GIK..R /B, GDJ/GIK..R/B, and GDJ/GIK..R/J48/B regulators. The net weight is 0.067 kg, and the type designation is GDJ/GIK..R /J48/B.

Parts of this type are selected by confirming the regulator series and the actuator type — pneumatic or electric. Verify the control signal (0-10 V, 4-20 mA, or pneumatic pressure) matches the valve body. They mount on the valve body and are separate from the valve coil and main body, so they are replaced independently. Before ordering, compare the type designation and operating pressure range stamped on the existing unit with the replacement.

Failures in this type of unit usually involve a worn or stuck diaphragm, spring, or linkage. Symptoms include erratic modulation of the gas flow or the regulator failing to reach the required output pressure or gas-air ratio. This may cause unstable burner operation or fluctuating heat output. Check these components for wear, sticking, or damage before replacing the entire regulator.