Kromschroder Gas pressure regulator VGBF40F40-3 86047010

The Kromschroder VGBF40F40-3 (SKU 86047010) is a flanged gas pressure regulator with a nominal diameter of 40 mm. It is designed to maintain a constant outlet pressure within a range of 10–30 mbar, with a factory setting of 20 mbar. The regulator operates on a spring-loaded principle and features inlet pressure compensation and zero shut-off for safety. It is certified to EN 88 and CE standards, suitable for natural gas, LPG, and air, and operates in ambient temperatures from -20 to 60 °C. This model does not require a vent line due to its built-in safety diaphragm.

When selecting a replacement gas pressure regulator of this type, verify the connection size (flanged or threaded), inlet pressure rating, and outlet pressure range to match the system requirements. Ensure the regulator's flow capacity aligns with the burner's gas consumption and that the gas type compatibility is correct. During installation, check that the regulator body and diaphragm are undamaged, and confirm the outlet pressure setting with a manometer after mounting.

Common failures in spring-loaded gas pressure regulators include drifting outlet pressure due to a weakened spring or damaged diaphragm, leading to unstable burner operation. A seized adjustment mechanism can prevent pressure changes, causing the outlet pressure to remain incorrect. If the zero shut-off function fails, gas may leak through when the burner is off, posing a safety risk. Regular inspection of the diaphragm and spring, and testing the shut-off function, are recommended.