Kromschroder Gas pressure regulator GDJ20R04-0L 03155032

The Kromschroder GDJ20R04-0L is a gas pressure regulator with a nominal diameter of 20 mm and a Rp 3/4" female thread connection. It handles a maximum inlet pressure of 400 mbar and an outlet pressure range of 5–160 mbar, with a standard setting of 12.5–25 mbar. The regulator features inlet pressure compensation, a compensation diaphragm, and a zero shut-off safety feature. It is designed for dry gas without condensate and operates in ambient temperatures from -20 to 60 °C. This model is manufactured in Germany.

When selecting a gas pressure regulator of this type, ensure the connection size and thread type match the existing piping, and that the inlet pressure and outlet pressure range are compatible with the system's requirements. The regulator may be installed as a stand-alone unit or integrated into a multiblock; verify the mounting orientation and space constraints. Before ordering, compare the nominal diameter and pressure specifications with the equipment's data plate or manual.

Common failures include diaphragm wear or valve seat damage, leading to unstable outlet pressure or inability to maintain set pressure. Symptoms may include burner pulsation, incomplete combustion, or failure to reach desired output. Check the regulator's outlet pressure with a manometer and inspect the diaphragm for cracks or deformation.